Schweitzer Engineering Laboratories SEL-749M Instruction Manual Download Page 235 | Manualshive

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Date Code 20080918

Instruction Manual

SEL-749M Relay

Appendix D

Modbus RTU Communications Protocol

Instructi on Manual

Overview

This appendix describes Modbus

®

RTU communications features supported

by the SEL-749M Relay on communications Port 3 or Port 4.

Complete specifications for the Modbus protocol are available from the
Modbus user’s group website at www.modbus.org.

Enable Modbus protocol with the serial port settings. When Modbus protocol
is enabled, the relay switches the port to Modbus protocol and deactivates the
ASCII protocol.

Modbus RTU is a binary protocol that permits communication between a
single master device and multiple slave devices. The communication is half
duplex; only one device transmits at a time. The master transmits a binary
command that includes the address of the desired slave device. All of the slave
devices receive the message, but only the slave device with the matching
address responds.

The SEL-749M Modbus communication allows a Modbus master device to do
the following:

➤

Acquire metering, monitoring, and event data from the relay.

➤

Control SEL-749M output contacts.

➤

Read the SEL-749M self-test status and learn the present
condition of all the relay protection elements.

➤

Read most of the relay settings and modify the relay settings.

Communications Protocol

Modbus Queries

Modbus RTU master devices initiate all exchanges by sending a query. The
query consists of the fields shown in

Table D.1

Modbus Query Fields

Field

Number of Bytes

Slave Device Address

1 byte

Function Code

1 byte

Data Region

0–251 bytes

Cyclical Redundancy Check (CRC)

2 bytes

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Summary of Contents for SEL-749M

Page 1: ...20080918 SEL 749M Motor Protection Relay Instruction Manual PM749M 01 NB Courtesy of NationalSwitchgear com ...

Page 2: ...SEMENT This device is shipped with default passwords Default passwords should be changed to private passwords at installation Failure to change each default password to a private password may allow unauthorized access SEL shall not be responsible for any damage resulting from unauthorized access WARNING Cet appareil est expédié avec des mots de passe par défaut A l installation les mots de passe p...

Page 3: ...3 Field Serviceability 2 19 Section 3 PC Software Overview 3 1 Setup 3 2 Terminal 3 3 Settings Database Management and Drivers 3 4 Settings 3 5 Event Analysis 3 10 Meter and Control 3 11 Available Help 3 14 Section 4 Protection and Logic Functions Overview 4 1 Application Data 4 2 Main Settings SET Command 4 3 Basic Motor Protection 4 4 PTC RTD Based Protection 4 20 Voltage Based Protection 4 24 F...

Page 4: ...erview 8 1 Front Panel Layout 8 1 Human Machine Interface 8 2 Operation and Target LEDs 8 9 Section 9 Analyzing Events Overview 9 1 Event Reporting 9 2 Sequential Events Recorder SER Report 9 14 Section 10 Testing and Troubleshooting Overview 10 1 Testing Tools 10 1 Commissioning Tests 10 3 Periodic Tests Routine Maintenance 10 10 Self Test 10 11 Troubleshooting 10 13 Factory Assistance 10 13 Appe...

Page 5: ... Features E 2 Electronic Data Sheet E 3 Appendix F Motor Thermal Element Overview F 1 Purpose of Motor Thermal Protection F 2 The Basic Thermal Element F 3 Motor Starting Protection F 6 Motor Running Protection F 7 Interpreting Percent Thermal Capacity Values F 9 Thermal Element Trip Time Equations F 9 Appendix G Relay Word Bits Overview G 1 Definitions G 2 Glossary Index SEL 749M Relay Command Su...

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Page 7: ...ble 4 8 Neutral Overcurrent Settings 4 11 Table 4 9 Residual Overcurrent Settings 4 13 Table 4 10 Load Jam Settings 4 13 Table 4 11 Undercurrent Settings 4 14 Table 4 12 Current Imbalance Settings 4 15 Table 4 13 Protection Disable Settings 4 16 Table 4 14 Start Monitor Settings 4 16 Table 4 15 Star Delta Settings 4 17 Table 4 16 Start Inhibit Settings 4 17 Table 4 17 Phase Reversal Setting 4 18 T...

Page 8: ...ets 7 5 Table 7 4 Serial Port Automatic Messages 7 7 Table 7 5 Command Response Header 7 9 Table 7 6 Access Commands 7 10 Table 7 7 ANALOG Command 7 11 Table 7 8 ANALOG Command Format 7 11 Table 7 9 BNAMES Command 7 12 Table 7 10 CASCII Command 7 12 Table 7 11 CEVENT Command Compressed Event Report 7 13 Table 7 12 CEVENT Command Format 7 13 Table 7 13 CHISTORY Command Compressed History 7 13 Table...

Page 9: ...s That Clear Relay Data Buffers 10 6 Table 10 3 Phase Current Measuring Accuracy 10 7 Table 10 4 Current Unbalance Measuring Accuracy 10 8 Table 10 5 Power Quantity Accuracy Wye Voltages 10 9 Table 10 6 Power Quantity Accuracy Delta Voltages 10 10 Table 10 7 Periodic Relay Checks 10 10 Table 10 8 Relay Self Tests 10 11 Table 10 9 Troubleshooting 10 13 Table A 1 Firmware Revision History A 1 Table ...

Page 10: ... 16 61h Read Parameter Text Command D 7 Table D 17 61h Read Parameter Text Query Error Messages D 7 Table D 18 62h Read Enumeration Text Command D 8 Table D 19 61h Read Parameter Enumeration Text Query Error Messages D 8 Table D 20 7Dh Encapsulated Packet With Control Command D 8 Table D 21 7Dh Encapsulated Packet Query Errors D 9 Table D 22 7Eh NOP Command D 9 Table D 23 Modbus Register Map D 11 ...

Page 11: ...erial Port Communication Parameters Dialog Box 3 2 Figure 3 3 Tools Menu 3 3 Figure 3 4 Device Response to the ID Command 3 3 Figure 3 5 Selection of Drivers 3 6 Figure 3 6 Update Part Number 3 7 Figure 3 7 New Setting Screen 3 7 Figure 3 8 Expressions Created With Expression Builder 3 9 Figure 3 9 Composite Screens for Retrieving Events 3 10 Figure 3 10 Saving the Retrieved Event 3 11 Figure 3 11...

Page 12: ... 8 SHOW Command Example 7 23 Figure 7 9 STATUS Command Example 7 25 Figure 7 10 Typical Relay Output for STATUS Command 7 26 Figure 7 11 SUMMARY Command Example 7 27 Figure 8 1 Front Panel Pushbuttons Overview 8 1 Figure 8 2 Access Level Security Padlock Symbol 8 3 Figure 8 3 Password Entry Screen 8 3 Figure 8 4 Front Panel Pushbuttons 8 4 Figure 8 5 SEL 749M Front Panel Menu Structure Continued 8...

Page 13: ...l System F 3 Figure F 3 Typical Induction Motor Current Torque and Rotor Resistance versus Slip F 4 Figure F 4 Motor Starting Thermal Element F 6 Figure F 5 Motor Running Thermal Element With Resistance and Trip Level Undefined F 7 Figure F 6 Calculating the Normal Operating Energy by Using Locked Rotor Trip Times F 7 Figure F 7 Motor Running Thermal Element F 8 Courtesy of NationalSwitchgear com ...

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Page 15: ...cribes the operation of each metering function describes the monitoring functions Section 6 Settings Describes how to enter and record settings for basic motor protection voltage based protection and RTD based protection Section 7 Communications Describes how to connect the SEL 749M to a PC for communication shows serial port pinouts lists and defines serial port commands Describes the optional co...

Page 16: ...phic Conventions There are two ways to communicate with the SEL 749M Using a command line interface on a PC terminal emulation window Using the front panel menus and pushbuttons The instructions in this manual indicate these options with specific font and formatting attributes The following table lists these conventions Examples This instruction manual uses several example illustrations and instru...

Page 17: ...ated IP54 or better The enclosure should be certified to these requirements or be tested for compliance as part of the complete assembly The following figure shows the compliance label that is located on the left side of the device Indicates a potentially hazardous situation that if not avoided may result in minor or moderate injury or equipment damage CAUTION Indicates an imminently hazardous sit...

Page 18: ...RE REMOVING COVER WARNING EXPLOSION HAZARD SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS 1 DIVISION 2 II 3 G Ex nC IIC 135ºC T4 This product complies with UL 1604 EN 60079 15 Applicable hazardous locations North America Class 1 Division 2 Groups A B C D T4 CSA C22 2 No 213 Environmental and Voltage Information Condition Range Description Indoor outdoor use Indoor Altitude Up to 2000 ...

Page 19: ...void using abrasive materials polishing compounds and harsh chemical solvents such as xylene or acetone on any surface of the relay Technical Assistance Obtain technical assistance from the following address Schweitzer Engineering Laboratories Inc 2350 NE Hopkins Court Pullman WA 99163 5603 USA Phone 1 509 332 1890 Fax 1 509 332 7990 Internet www selinc com E mail info selinc com Connection Type M...

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Page 21: ...install set test operate and maintain any SEL 749M It is not necessary to review the entire manual to perform specific tasks Features Standard Protection Features Thermal Overload thermal model 49 Undercurrent Load Loss 37 Current Balance and Phase Loss 46 Overcurrent Load Jam Short Circuit 50P Ground Fault 50G Ground Fault 50N Motor Starting Running Protection Inhibit During Start Start Motor Tim...

Page 22: ...e magnitudes The last five trip causes are saved in nonvolatile memory Event Reports including filtered and raw analog data Sequential Events Record SER Motor operating statistics since the last reset Running and stopped times Number of starts and emergency starts Average and Peak metering values during start and run periods Number of various Alarms and Trips Motor Start Reports for as long as 60 ...

Page 23: ... three output contacts Slot A IA IB IC and IN current inputs card ACSELERATOR QuickSet SEL 5030 Software User configurable labels Protocols include Modbus RTU SEL ASCII SEL Compressed ASCII SEL Fast Meter SEL Fast Operate SEL Fast SER SEL Fast Message Three expansion card slots Options The SEL 749M has the following options Voltage Option Slot E four wire wye or open delta connected VTs Input Outp...

Page 24: ...ing Kits For one relay Part 915900007 For two relays Part 915900008 For one relay and a test switch Part 915900009 Replacement Rear Connector Kits Without retaining screws Part 915900010 With retaining screws Part 915900014 For information on additional SEL 749M mounting accessories including adapter plates go to www selinc com Mounting Accessories Applications Section 2 Installation includes ac a...

Page 25: ...ications ports The following steps require PC terminal emulation software and an SEL Cable C234A or equivalent to connect the SEL 749M to the PC See Section 6 Settings for further information on serial communications connections and the required cable pinout Step 1 Connect the PC and the SEL 749M using the serial communications cable Step 2 Apply power to both the PC and the relay Step 3 Start the...

Page 26: ...sabled Figure 1 2 STA Command Response No Communications Card or Communications Card Modbus RTU Protocol If a communications card with DeviceNet protocol is present then the status report depicted in Figure 1 3 applies STA Enter SEL 749M Date 12 10 2003 Time 19 10 13 221 MOTOR RELAY Time Source internal FID SEL 749M R100 V0 Z001001 D20031210 CID 0965 Part Number 0749M01B613X0X11 SELF TESTS Current...

Page 27: ...DMY the relay will reply 29 7 2003 Changing the Date Type DAT followed by the correct date at the prompt to change the date stored in the relay For example to change the date to May 2 2003 DATE_F MDY enter the following at the action prompt DAT 5 2 03 You can separate the month day and year parameters with spaces commas slashes colons and semicolons TIM Time Command Viewing the Time Enter TIM at t...

Page 28: ...c Test Voltage 2000 Vac Impulse Withstand Voltage Uimp 4000 V Mechanical Durability 10 000 no load operations DC Output Ratings Rated Operational Voltage 250 Vdc Rated Voltage Range 19 2 275 Vdc Rated Insulation Voltage 300 Vdc Make 30 A 250 Vdc per IEEE C37 90 Continuous Carry 6 A 70 C 4 A 85 C Thermal 50 A for 1 s Contact Protection 360 Vdc 40 J MOV protection across open contacts Operating Time...

Page 29: ...2 or EIA 485 Option 2 DeviceNet Protocol Dimensions Refer to Figure 2 1 for relay dimensions Weight 2 0 kg 4 4 lbs Terminal Connections Current Inputs Terminal Block Tightening Torque Minimum 0 9 Nm 8 in lb Maximum 1 4 Nm 12 in lb Compression Plug Tightening Torque Minimum 0 5 Nm 4 4 in lb Maximum 1 0 Nm 8 8 in lb Type Tests Environmental Tests Enclosure Protection IEC 60529 2001 IP65 enclosed in ...

Page 30: ...s Card Relative Humidity 5 to 95 Maintains supply voltage fluctuations up to 10 of nominal voltage Overvoltage Category II Pollution Degree 2 Atmospheric Pressure 80 110 kPa Processing Specifications AC Voltage and Current Inputs 16 samples per power system cycle Digital Filtering One cycle cosine after low pass analog filtering Net filtering analog plus digital rejects dc and all harmonics greate...

Page 31: ...10 Open and short RTD detection Up to 500 m away using fiber optic cable Trip and Alarm Temperatures Setting Range Off 1 250 C Accuracy 2 C Metering Accuracies are specified at 20 C nominal frequency ac currents within 0 2 20 0 INOM A secondary and ac voltages within 50 250 V secondary unless otherwise noted Motor Phase Currents 2 of reading 2 3 Phase Average Motor Current 2 of reading 3 Phase Ave...

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Page 33: ... for proper physical installation of the SEL 749M Physical Location You can mount the SEL 749M in a sheltered indoor environment a building or an enclosed cabinet that does not exceed the temperature and humidity ratings for the relay The relay is IEC EN 61010 1 rated at Installation Overvoltage Category II and Pollution Degree 2 This rating allows mounting of the relay indoors or in an outdoor ex...

Page 34: ...plication In total the SEL 749M has six rear panel slots labeled as Slots A B C D E and Z Slots A B and Z are base unit slots each associated with a specific function Optional digital analog I O communications and voltage cards are available for the SEL 749M Table 2 1 shows the slot allocations for the cards Table 2 1 Slot Allocations for Different Cards Sheet 1 of 2 Rear Panel Slot Software Refer...

Page 35: ... supports the following protocols Modbus RTU Slave SEL ASCII and Compressed ASCII SEL Fast Meter SEL Fast Operate SEL Fast SER SEL Fast Message Unsolicited Write SEL Settings File Transfer E N A Voltage card Z N A CT card in base unit Table 2 1 Slot Allocations for Different Cards Sheet 2 of 2 Rear Panel Slot Software Reference Description NOTE When either a current or voltage signal is available ...

Page 36: ...ve sequence voltage and samples at 16 times a cycle see Processing Specifications on page 1 10 for more information Current Card Supported in Slot Z only this card provides current inputs for three phase CTs and one neutral CT Secondary phase current ratings are either all 1 A or all 5 A you cannot order a combination of 1 A and 5 A phase CTs on one card However the phase CTs and the neutral CT ca...

Page 37: ...Card Terminal Designation Terminal Number Description 01 02 IA Phase A current input 03 04 IB Phase B current input 05 06 IC Phase C current input 07 08 IN neutral current input Table 2 6 I O Card 3 DI 4 DO 1 AO Terminal Allocation Terminal Number Software Reference Description 01 02 OUT401 driven by OUT401 SELOGIC equation 03 04 OUT402 driven by OUT402 SELOGIC equation 05 06 OUT403 driven by OUT4...

Page 38: ...p 8 Press the Down Arrow pushbutton until STATUS is highlighted Step 9 Press the ENT pushbutton The front panel displays the following Confirm Hardware Config Enter Step 10 Press the ENT pushbutton The front panel displays the following Accept Config Yes No Step 11 Select Yes and press the ENT pushbutton The front panel displays the following Config Accepted Enter to Restart Step 12 Press ENT The ...

Page 39: ...ard 7 Main Board with PTC and EIA 232 Rear Port 01 02 IA 03 04 IB 05 06 IC 07 08 IN 02 03 VA WYE VB VC VB COM VC VA OPEN DELTA N COM 0 1 04 I NPUTS AO_0 1 I N_0 1 I N_02 I N_03 OUT_0 1 OUT_02 OUT_03 OUT_04 08 05 06 02 04 09 03 1 0 1 1 1 2 1 3 1 4 07 0 1 I NPUTS 08 05 06 02 04 09 03 1 0 1 1 1 2 1 3 1 4 1 5 1 6 07 0 1 I N_0 1 I N_02 I N_03 I N_04 I N_05 I N_06 I N_07 I N_08 PORT 4C 5 Vdc RXD N C TXD...

Page 40: ...ors on the rear panel and top panel diagrams of three sample configurations of the SEL 749M are shown in Figure 2 3 Figure 2 4 and Figure 2 5 Figure 2 3 PTC Input EIA 232 EIA 485 Communications Card 3 DI 4 DO 1 AO Card and Voltage Card Options i4155a B01 B02 i4152a A Rear Panel Layout B Top Panel Input and Output Designations Courtesy of NationalSwitchgear com ...

Page 41: ...49M Relay Installation Rear Panel Connections Figure 2 4 IRIG B Input DeviceNet Card 3 DI 4 DO 1 AO Card and Voltage Card Options i4156a B01 B02 i4153a A Rear Panel Layout B Top Panel Input and Output Designations Courtesy of NationalSwitchgear com ...

Page 42: ...ode 20080918 Installation Rear Panel Connections Figure 2 5 IRIG B Input 8 DI Card 3 DI 4 DO 1 AO Card and Voltage Card Options i4154a B01 B02 i4151a A Rear Panel Layout B Top Panel Input and Output Designations Courtesy of NationalSwitchgear com ...

Page 43: ...rt 4 communication interface COMMINF setting to select between EIA 485 and EIA 232 Modbus RTU protocol is available on Port 3 or 4 but not both The serial port EIA 485 plug in connector accepts wire size AWG 24 through AWG 12 Strip the wires 8 mm 0 31 inches and install with a small slotted tip screwdriver All EIA 232 ports accept 9 pin D subminiature male connectors For connecting devices at dist...

Page 44: ...are single rated 24 48 110 125 220 or 250 Vac Vdc IN101 102 may have a different rating than IN401 402 403 Output contacts OUT101 OUT102 and OUT103 are standard and are located on the card in Slot A Output contacts OUT401 OUT402 OUT403 and OUT404 are located on the optional 3 DI 4 DO 1 AO I O Expansion card in Slot D The Analog transducer Output is located on the optional 3 DI 4 DO 1 AO I O Expans...

Page 45: ...t When the relay coil is de energized the contact between A07 and A08 is open while the contact between A07 and A09 is closed Figure 2 7 Output OUT103 Relay Output Contact Configuration The SEL 749M provides fail safe and nonfail safe trip modes setting selectable for all output contacts The following occurs in fail safe mode The relay coil is energized continuously if the SEL 749M is powered and ...

Page 46: ...rt the motor in addition to the manual start pushbutton This allows internal relay logic to start the motor Figure 4 23 shows the logic the relay uses to initiate motor starts Figure 2 9 Contactor Application Using Factory Default Settings A07 TC 52A Fail Safe Electrically Held OUT103FS Y Nonfail safe OUT103FS N Circuit Breaker Contactor CR CR STOP START 52A Breaker Trip Coil A09 A07 A08 A07 STOP ...

Page 47: ...hows the three methods of connecting the three phase voltages Figure 2 10 Voltage Connections CAUTION Current limiting fuses in direct connected voltage applications are recommended to limit short circuit arc flash incident energy A B C A B C SEL 749M EO1 EO2 EO3 EO4 EO1 EO2 EO3 EO4 Direct Connection Wye Wye VT Connection Open Delta VT Connection F1 F2 F3 F1 F2 and F3 are fuses SEL 749M F1 F3 A B ...

Page 48: ...TRIP OUT101 SALARM OR HALARM Figure 2 12 Control Connections for Failsafe Tripping SEL 749M CBT CBT core balance current transformer The current transformers and the SEL 749M chassis must be grounded in the relay cabinet A B C IN IC IB IA M 3 Z08 Z07 Z06 Z05 Z04 Z03 Z02 Z01 Contactor Indicator contactor closed Indicator relay alarm CR I1 I2 CR STOP START I1 OUT103 SEL 749M OUT101 ALARM H N PS A07 ...

Page 49: ...gle winding motor rated for star delta starting is required The current transformers must be located as shown outside the delta OUT103FS Y OUT401 DELTA OUT103 TRIP OUT402 STAR OUT101 SALARM OR HALARM SEL 749M A B C A B C IC IB IA M 3 Z03 Z06 Z05 Z04 Z02 Z01 CR1 CR2 CR3 Contactor Indicator contactor closed Indicator relay alarm CR1 CR2 CR3 I1 I2 CR1 STOP START I1 OUT103 SEL 749M OUT101 ALARM OUT402...

Page 50: ...nterlocked so that only one is energized to select either Speed1 or Speed2 The following setting is required SPEED2 IN101 Figure 2 15 AC Connections for a Two Speed Motor Paralleled CTs C2 H N LC LB LA SEL 749M IC IB IA LN Z06 Z05 A10 A11 Z04 Z03 Z02 Z01 IN101 Speed 1 Windings Speed 2 Windings A B C M 3 C B A C2 C1 LA LB LC LN Courtesy of NationalSwitchgear com ...

Page 51: ...lder Step 6 Replace the fuse with a time delay 5 x 20 mm 3 15 A high breaking capacity 250 V fuse T3 15 H 250 V Step 7 Insert the printed circuit board into Slot A Step 8 Replace the relay rear panel and energize the relay Real Time Clock Battery Replacement To replace the real time clock battery perform the following steps Step 1 De energize the relay Step 2 Remove the four rear panel screws and ...

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Page 53: ...tings for specific applications SEL 5040 ACSELERATOR Report Server SEL 5040 Software Automatically retrieves files and summarizes reports SEL 5601 ACSELERATOR Analytic Assistant SEL 5601 Software Converts SEL Compressed ASCII event report files to oscillography SEL 5801 SEL 5801 Cable Selector Software Selects the proper SEL cables for your application Table 3 2 ACSELERATOR QuickSet SEL 5030 Softw...

Page 54: ...OR QuickSet uses relay communications Port 3 Port 4 or Port F front panel to communicate with the SEL 749M Perform the following steps to configure ACSELERATOR QuickSet to communicate effectively with the relay Step 1 Select Communications from the ACSELERATOR QuickSet main menu bar as shown in Figure 3 1 Figure 3 1 Serial Port Communication Dialog Box Step 2 Select the Parameters submenu to displ...

Page 55: ...king Tools Terminal or by pressing Ctrl T Verify proper communications with the relay by opening a terminal window pressing Enter a few times and verifying that a prompt is received If a prompt is not received verify proper setup Terminal Logging To create a file that contains all terminal communications with the relay select Terminal Logging in the Log menu and specify a file at the prompt ACSELE...

Page 56: ...e new databases and manage records within existing databases Settings Database Step 1 Open the Database Manager to access the database Click File Database Manager A dialog box appears The default database file already configured in ACSELERATOR QuickSet is Relay rdb This database contains example settings files for the SEL products with which you can use ACSELERATOR QuickSet Step 2 Enter descriptio...

Page 57: ...ick File Database Manager and select the Copy Move Settings Between Databases tab in the Database Manager dialog box ACSELERATOR QuickSet opens the last active database and assigns it as Database A Step 2 Click the Open B button ACSELERATOR QuickSet prompts you for a file location Step 3 Type a new database name click the Open button and click Yes the program creates a new empty database Load devi...

Page 58: ...f settings Use the File menu to Open an existing record create and open a New record or Read relay settings from a connected SEL 749M and then create and open a new record Use Tools menu to Convert and open an existing record The record will be opened in the Setting Editor as a Setting Form template or in Editor Mode File New Selecting the New menu item creates new settings files ACSELERATOR Quick...

Page 59: ... 6 Press OK when finished Figure 3 6 Update Part Number Figure 3 7 shows the Settings Editor screen View the bottom of the Settings Editor window to check the Settings Driver number Compare the ACSELERATOR QuickSet Settings Driver number and the first portion of the Z number in the FID string select Tools Meter Control Status These numbers must match ACSELERATOR QuickSet uses this first portion of...

Page 60: ...lick the marks and the buttons in the Settings Tree View to expand and select the settings you want to change Step 2 Use Tab to navigate through the settings or click on a setting Step 3 To restore the previous value for a setting right click the mouse over the setting and select Previous Value Step 4 To restore the factory default setting value right click in the setting dialog box and select Def...

Page 61: ...ion Builder Use the right side of the equation RVALUE to select broad categories of device elements analog quantities counters timers latches and logic variables Select a category in the RVALUE tree view and the Expression Builder displays all operands for that category in the list box at the bottom right side Directly underneath the right side of the equation choose operators to include in the RV...

Page 62: ...t Number Use this menu item to change the part number if it was entered incorrectly during an earlier step Text Files Select Tools Import and Tools Export on the ACSELERATOR QuickSet menu bar to import or export settings from or to a text file Use this feature to create a small file that can be more easily stored or sent electronically Event Analysis ACSELERATOR QuickSet has integrated analysis to...

Page 63: ...t type with the Options Event type function 4 samples or 16 samples and click the Get Selected Event button When downloading is complete ACSELERATOR QuickSet queries whether to save the file on your computer as shown in Figure 3 10 Figure 3 10 Saving the Retrieved Event Enter a suitable name in the File name text box and select the appropriate location where ACSELERATOR QuickSet should save the ev...

Page 64: ...text above the square you want to change After double clicking on the text a box with available Relay Word bits appears in the lower left corner of the screen Select the appropriate Relay Word bit and click the Update button to assign the Relay Word bit to the LED To change the color of the LED click in the square and make your selection from the color palette The front panel LEDs display the stat...

Page 65: ...the ASCII STA and SER commands Click on the Motor Start Report Data button to display the motor start report data or on the Graph button to display the report graphically Figure 3 12 shows the control screen From here you can clear the Event History SER trigger events and reset metering data You can also reset the targets synchronize with IRIG and set the time and date Figure 3 12 Control Screen T...

Page 66: ...text sensitive help file with the appropriate topic as the default Table 3 4 ACSELERATOR QuickSet Help Forms Help Types Description General ACSELERATOR QuickSet Select Help from the main menu bar SEL 749M Settings Select Settings Help from the Help menu bar while the Settings Editor is open Database Manager Select Help from the bottom of the Database Manager window Courtesy of NationalSwitchgear c...

Page 67: ... all models of the SEL 749M including the thermal element overcurrent elements load loss functions and load jam functions PTC and RTD Based Protection Lists settings associated with the PTC and RTD inputs You can skip this subsection if your application does not include PTC and RTD inputs Voltage Based Protection Relays With Voltage Inputs Lists settings associated with the optional ac voltage bas...

Page 68: ...ou to calculate settings for the SEL 749M if you collect the following information before you begin collect the information for each speed for a two speed motor application Specifications of the protected motor including the following details Rated full load current Service factor Locked rotor current Maximum locked rotor time with the motor at ambient and or operating temperature Maximum motor st...

Page 69: ...ings Table 4 4 shows voltage settings for relay models with optional voltage inputs These settings configure the optional relay voltage inputs to correctly measure and scale the voltage signals Set the phase PT ratio PTR setting equal to the VT ratio Table 4 1 Identifier Settings Setting Prompt Setting Range Setting Name Factory Default UNIT ID LINE 1 16 Characters RID SEL 749M UNIT ID LINE 2 16 C...

Page 70: ...Overload Imbalance Current Negative Sequence Current Heating Repeated or Frequent Starting The Thermal Method setting SETMETH selects the thermal element algorithm that will be used in the SEL 749M The Thermal Method setting offers the following two options Rating Thermal Method When selected the relay configures a thermal curve based on the motor Full Load Amps Service Factor Run State Time Const...

Page 71: ...etting A 4000 V 600 HP motor is protected by the SEL 749M Thermal Overload Element The motor data sheet includes the following information Rated Horsepower 600 HP Rated Voltage 4000 V Rated Full Load Current 80 A Rated Locked Rotor Amps 480 A Safe Stall Time at 100 Volts Cold 18 seconds Hot 15 seconds Service Factor 1 2 Table 4 4 Overload Thermal Model Settings Setting Prompt Setting Range Setting...

Page 72: ...t greater than 1 00 use the speed switch see Table 4 18 to provide locked rotor protection See Figure 4 1 for thermal overload limits for selected settings Refer to Equation F 10 through Equation F 17 in Appendix F Motor Thermal Element for these and additional curves Figure 4 1 Thermal Overload Limits Rating Method NOTE For IEC applications set SF 1 05 or higher but no higher than 1 2 RTC TD 0 2 ...

Page 73: ... Equation F 17 in Appendix F Motor Thermal Element for these and additional curves Be sure that the standard curve you select trips in a time less than or equal to the motor rated locked rotor time at locked rotor current Each increase in the curve number yields a 2 5 second increase in the curve thermal limit time at six times full load current For a cold rotor the curve 10 trip time at six times...

Page 74: ... 00 10 00 100 00 Multiples of Full Load Amps Trip Times in Seconds 45 30 15 10 5 3 2 1 CURVE A Service Factor 1 01 B Service Factor 1 15 1 Trip times are for Cold rotor and Hot stator 2 Relay Settings Thermal Method Curve Curve see the curves 1 Trip times are for Cold rotor and Hot stator 2 Relay Settings Thermal Method Curve Curve see the curves Table 4 5 Thermal Limit Tripping Times in Seconds v...

Page 75: ... 5 00 3 60 7 20 10 80 18 00 36 00 54 00 108 162 0 6 00 2 50 5 00 7 50 12 50 25 00 37 50 75 00 112 5 7 00 1 84 3 67 5 51 9 18 18 37 27 55 55 10 82 65 8 00 1 41 2 81 4 22 7 03 14 06 21 09 42 19 63 28 9 00 1 11 2 22 3 33 5 56 11 11 16 67 33 33 50 00 10 0 0 90 1 80 2 70 4 50 9 00 13 50 27 00 40 50 11 0 0 74 1 49 2 23 3 72 7 44 11 16 22 31 33 47 12 0 0 63 1 25 1 88 3 13 6 25 9 38 18 75 28 13 14 0 0 63 ...

Page 76: ...tor protected by a fused contactor disable the phase overcurrent element by setting its trip level to OFF If the relay is connected to a device capable of interrupting fault current use the element to detect and trip for phase overcurrent faults Set the phase overcurrent trip level 50P1P equal to 2 0 times the motor locked rotor current with a 0 0 second time delay Set the phase overcurrent warn l...

Page 77: ...nput The residual RES overcurrent elements 50G1T and 50G2T operate with the current derived from the phase currents see Figure 4 3 When a core balance CT is connected to the relay IN input as in Figure 2 11 use the neutral overcurrent element to detect motor ground faults Calculate the trip and warn level settings based on the available ground fault current and the core balance CT ratio Table 4 8 ...

Page 78: ...TRN see Main Settings SET Command on page 4 3 equal to 10 and Neutral Trip Lvl 50N1P equal to 5 A with 0 10 second time delay ensures that the element will quickly detect and trip for motor ground faults but prevent misoperation resulting from unequal breaker or contactor pole closing times 50P1P IP IA IB IC IN PHROT IG Current Magnitude Calculations IP IN IG 50P1T 50P2P 50P2T 50N1P IN 50N1T 50N2P...

Page 79: ...he relay trips see Figure 4 5 Set the jam trip level greater than the expected normal load current but less than the rated locked rotor current This setting is entered in per unit of the full load amps FLA setting Table 4 9 Residual Overcurrent Settings Setting Prompt Setting Range Setting Name Factory Default RES OC TRIP LVL Off 0 10 1 00 xFLA 50G1P OFF RES OC TRIP DLAY 0 00 5 00 sec 50G1D 0 50 R...

Page 80: ...G JAMALRM LJADLY 0 JAMTRIP LJTDLY 0 Relay Word Bits Relay Word Bit Setting Setting Settings Table 4 11 Undercurrent Settings Setting Prompt Setting Range Setting Name Factory Default UC TRIP LEVEL Off 0 10 1 00 xFLA LLTPU OFF UC TRIP DELAY 0 4 120 0 sec LLTDLY 5 0 UC WARN LEVEL Off 0 10 1 00 xFLA LLAPU OFF UC WARN DELAY 0 4 120 0 sec LLADLY 10 0 UC START DELAY 0 1500 sec LLSDLY 0 Load Loss Trip Pi...

Page 81: ...g effect of the negative sequence current you may desire the additional imbalance and single phasing protection offered by a current imbalance element The SEL 749M calculates percent imbalance current in one of two ways depending on the magnitude of the average current When the average current Iav is greater than the motor rated full load current the relay calculates the percent imbalance Equation...

Page 82: ...fault and undervoltage elements Set the overload inhibit time setting THERBL_T for the time you want to disable the overload thermal model element If you use the time delay settings keep the delays as short as possible Start Monitoring 46UBAD 0 46UBA 46UBTD 0 46UBT Enable Enable Im Iav IA IC FLA 46UBA 46UBT IB Relay Word Bits UB Im Iav 100 Avg 0 25 Max Dev Settings Inputs UB Im FLA 100 IA IB IC FL...

Page 83: ...d Delta exceeds a set time start monitoring must also be used Start Inhibit Function When the protected motor is rated for a specific maximum number of starts per hour or minimum time between starts set the MAXSTART and TBSDLY settings accordingly If the relay detects MAXSTART starts within 60 minutes and the motor stops or is tripped the relay asserts the TRIP output contact to prevent an additio...

Page 84: ...gency restart function overrides all three limits allowing the motor to be placed back in service in an emergency Phase Reversal Protection The SEL 749M uses phase currents or phase voltages if available to determine that the phase rotation of signals applied to the relay matches the phase rotation setting PHROT When you set E47T equal to Y the relay trips 0 5 seconds after incorrect phase rotatio...

Page 85: ...rsal Element Logic 0 5 s 0 47T E47T Y Voltage Option Y DELTA_Y Wye VA VB VC VAB VBC 60 V 0 5 V2 0 25 FLAmin V1 IA IB IC 0 5 I2 I1 35 V Relay Word Bits Relay Inputs I1 V1 and I2 V2 indicate positive sequence and negative sequence quantities FLAmin Lowest Full Load Current Setting Allowed Relay Inputs Courtesy of NationalSwitchgear com ...

Page 86: ... winding This function is independent of the thermal model and accounts for conditions such as ambient temperature obstructed cooling etc The detectors and their leads are monitored for short circuits Table 4 18 Speed Switch Settings Setting Prompt Setting Range Setting Name Factory Default SS TRIP DELAY Off 1 240 sec SPDSDLYT OFF SS WARN DELAY Off 1 240 sec SPDSDLYA OFF NOTE In addition to settin...

Page 87: ...or RTD1 settings for RTD2 RTD12 are similar When an SEL 2600 RTD module is not connected to the relay disable the RTD function by setting E49RTD equal to N RTD Location The relay allows you to independently define the location of each monitored RTD by using the RTD location settings 4000 1330 550 250 100 20 10 20 C 0 C TNF TNF R Ω Nominal pickup temperature Resistance to sensors TNF 20 K TNF 5 K T...

Page 88: ...120 ohm nickel NI120 10 ohm copper CU10 RTD Trip Warning Levels The SEL 749M provides temperature warnings and trips through use of the RTD temperature measurements and the warning and trip temperature settings in Table 4 20 The relay issues a winding temperature warning if any of the healthy winding RTDs RTD location setting equals WDG indicate a temperature greater than the relay RTD warning tem...

Page 89: ...l Capacity Equation 4 7 As ambient temperature rises the ability of a motor to shed heat to the surroundings is reduced and internal temperatures rise To preserve insulation life NEMA standards suggest a 1 C reduction in RTD trip temperature for each 1 C rise in ambient temperature over 40 C When you enable RTD biasing the SEL 749M automatically reduces the RTD trip temperatures for all winding RT...

Page 90: ... in Figure 2 10 the relay provides two levels of phase to neutral overvoltage and undervoltage elements Each of the elements has an associated time delay You can use these elements as you choose for tripping and warning Figure 4 13 and Figure 4 14 show the logic diagram for the undervoltage and overvoltage elements respectively To disable any of these elements set the level settings equal to OFF T...

Page 91: ...C Voltage Magnitude Calculation VP VPP Minimum Phase Voltage Magnitude Minimum Phase to Phase Voltage Magnitude 27P1P 27P2P Vnm Settings Effective Nominal Voltage 27P1P 27P2P 27P1P 27P2P 59P1P Vnm VP 59P1D 0 59P1T 59P2P Vnm 0 59P2D 59P2T 59P1D 0 59P1T 0 59P2D 59P2T Relay Word Bits When DELTA_Y WYE When DELTA_Y DELTA 59P1P Vnm VPP 59P2P Vnm 59P1P 59P2P Vnm Settings Effective Nominal Voltage 59P1P 5...

Page 92: ... VAR warn level NVARAP and negative VAR trip level NVARTP settings to OFF Underpower Function Table 4 23 VAR Settings Setting Prompt Setting Range Setting Name Factory Default NEG VAR TRIP LEV Off 1 25000 kVAR NVARTP OFF POS VAR TRIP LEV Off 1 25000 kVAR PVARTP OFF VAR TRIP DLY 0 240 sec VARTD 1 NEG VAR WARN LEV Off 1 25000 kVAR NVARAP OFF POS VAR WARN LEV Off 1 25000 kVAR PVARAP OFF VAR WARN DLY ...

Page 93: ...y setting the relay can issue a warning or trip signal The power factor elements are disabled when the motor is stopped or starting Figure 4 17 shows the logic diagram for the power factor elements These elements can be used to detect synchronous motor out of step or loss of field conditions Refer to Figure 5 3 for the relay power measurement convention For application on an induction motor disabl...

Page 94: ...OP Relay Word bit at logical 1 The relay resets LOP when the positive sequence voltage V1 returns to a level greater than 0 43 VNOM PTR while negative sequence voltage V2 and zero sequence voltage V0 are both less than 5 V secondary VNOM and PTR are relay settings Settings The loss of potential function has no settings and is always active You must incorporate the LOP function in a SELOGIC control...

Page 95: ...n OR NOT LOP AND LOADLOW OR 37PT OR 55T OR VART OR You can supervise each element separately or as a group when these elements occur in the trip equations as shown in this example LOP Monitoring and Alarms You should take steps to immediately correct a loss of potential problem so that normal protection is rapidly re established Include the LOP Relay Word bit in an output contact alarm to notify o...

Page 96: ...Figure 4 19 Over and Underfrequency Element Logic Table 4 26 Frequency Settings Setting Prompt Setting Range Setting Name Factory Default FREQ1 TRIP LEVEL Off 55 0 65 0 Hz 81D1TP OFF FREQ1 TRIP DELAY 0 0 240 0 sec 81D1TD 1 0 FREQ1 WARN LEVEL Off 55 0 65 0 Hz 81D1AP OFF FREQ1 WARN DELAY 0 0 240 0 sec 81D1AD 1 0 FREQ2 TRIP LEVEL Off 55 0 65 0 Hz 81D2TP OFF FREQ2 TRIP DELAY 0 0 240 0 sec 81D2TD 1 0 F...

Page 97: ...eter is above the lower level setting for 1 second You can use this feature to control the motor load within set limits I O Configuration Analog Output The SEL 749M provides a 4 20 mA dc analog current output with a variety of output parameters Use the analog output select setting AOPARM to select the desired parameter from the list of available options Table 4 29 shows description and scaling of ...

Page 98: ...analog output will be scaled using power factor For power factors 0 8 lag unity and 0 8 lead the analog outputs will be 4 mA 12 mA and 20 mA respectively Trip Inhibit Block Function Table 4 29 Scaling of Analog Output ANALOG OUT SEL AOPARM Description Output Scaling 4 mA 20 mA Unit LOAD_I Average Load Current 0 0 1 0 Per Unit of FLA AVG_I Average Load Current 0 2 2 0 Per Unit of FLA MAX_I Maximum ...

Page 99: ...erload jam During commissioning and fault location localizing the source of the trouble Trip Close Logic NOTE The factory default assignment of the Relay Word bit TRIP is the output OUT103 See Table 4 37 for the output contacts settings The SEL 749M tripping logic is designed to trip or stop motors energized through circuit breakers or contactors The relay logic lets you define the conditions that...

Page 100: ...103FS at Y See Section 2 Installation Fail Safe Nonfail Safe Tripping on page 2 13 NOTE You can use an indirect mapping e g SV01T as in the factory default setting See Table 4 36 for the SV01 settings Set the TR SELOGIC control equation to include an OR combination of all the enabled protection element Relay Word bits that you want to cause the relay to trip Use the factory default setting as a gu...

Page 101: ...l the ABSDLY timer expires Minimum Time Between Starts Lockout A new start is not permitted until after the minimum time between starts has passed The trip signal is maintained until a start is permitted Starts Per Hour Limit Lockout If the starts per hour limit has been met a new start is not permitted until 60 minutes after the oldest start The trip signal is maintained until a start is permitte...

Page 102: ...ce the SEL 749M for external start control and motor speed control Table 4 32 lists these SELOGIC control equation settings NOTE When the 52A is used with an appropriate control input it enhances the motor state logic see Figure 4 22 This is particularly important if the motor has low operational idling current less than 10 percent FLA NOTE Set 52A 0 if you do not connect the contactor breaker aux...

Page 103: ...ion function see Figure 4 20 You can override all of the lockout conditions Use the emergency restart function The relay asserts the emergency restart bit EMRSTR in response to any of the following conditions The control input assigned to EMRSTR asserts The relay receives an emergency restart control command from front panel or Modbus DeviceNet command When the emergency restart bit asserts the re...

Page 104: ... Table 4 35 and Table 4 36 This helps limit the number of settings that need to be made Latch Bits Equations Table 4 33 Settings Selected by SPEED2 Input Setting Description Normal Setting Prompt Normal Setting Name Second Setting Prompt Second Setting Name Phase CT Ratio PHASE CT RATIO CTR1 CT RATIO 2nd CTR2 Full Load Current MOTOR FLA FLA1 MOTOR FLA 2nd FLA2 Locked Rotor Current MOTOR LRC LRA1 M...

Page 105: ...e TRIP output fail safe by selecting N In addition you can select any of the auxiliary outputs to be fail safe or nonfail safe according to what you need for your application NOTE The SEL 749M includes eight SELOGIC variable timers Table 4 36 shows settings only for SV01 and SV02 settings for SV03 SV08 are similar to SV02 Table 4 36 SELOGIC Variable Timer Settings Setting Prompt Setting Range Sett...

Page 106: ...t lockouts See Figure 4 20 for more details You should assign a contact input e g RSTTRGT IN401 if you want remote target reset Access Control NOTE DSABLSET does not disable the setting changes from the serial ports The DSABLSET setting defines conditions for disabling all front panel setting changes You can view the settings but cannot change relay settings when the Relay Word bit DSABLSET is ass...

Page 107: ...N HDWR HANDSHAKING Y N RTSCTS N Table 4 42 Rear Panel Serial Port 3 Settings Setting Prompt Setting Range Setting Name Factory Default PROTOCOL SEL MOD PROTO SEL SPEED 300 38400 bps SPEED 9600 DATA BITS 7 8 bits BITS 8 PARITY O E N PARITY N STOP BITS 1 2 bits STOP 1 PORT TIMEOUT 0 30 min T_OUT 5 SEND AUTOMESSAGE Y N AUTO N HDWR HANDSHAKING Y N RTSCTS N FAST OP MESSAGES Y N FASTOP N MODBUSa SLAVE I...

Page 108: ...t Set FASTOP N to block binary Fast Operate messages Refer to Appendix C SEL Communications Processors for the description of the SEL 749M Fast Operate commands Use the Port 4 factory default settings to establish communications when the DeviceNet card is used Table 4 44 shows the additional settings which can be set only at the rear on the DeviceNet card Once the relay detects the DeviceNet card ...

Page 109: ...6_LED control the six front panel LEDs see Figure 8 1 and Figure 8 7 for the programmable LED locations Table 4 46 Display Enable Settings Setting Prompt Setting Range Setting Name Factory Default TIME DATE Y N FP_TD N GROUND CURRENT Y N FP_GC N CURRENT IMBALANC Y N FP_LA N FREQUENCY Y N FP_MF N THERM CAP USED Y N FP_TH N VOLTAGE IMBALANC Y N FP_VA N POWER Y N FP_PE N RTD TEMPERATURE Y N FP_RTD N ...

Page 110: ...e data before changing the setting Event reports can be either 15 cycles or 64 cycles in length as determined by the LER setting For LER of 15 the prefault length PRE must be in the range 1 10 The relay can hold twenty three 15 cycle event reports or seven 64 cycle event reports Table 4 48 SERa Trigger Settings a Use up to 24 Relay Word elements separated by spaces or commas for each setting Setti...

Page 111: ...operate similarly and the resultant Relay Word bits are IN301 IN308 The figures show examples of energized and de energized optoisolated inputs and corresponding Relay Word bit states To assert an input apply rated control voltage to the appropriate terminal pair see Figure 2 4 and Figure 2 6 Figure 4 25 is used for the following discussion examples The optoisolated inputs in Figure 4 26 operate s...

Page 112: ...and IN102 control Relay Word bits IN101 and IN102 that are used in SELOGIC control equations Remote Control Switches Remote control switches are operated via the serial communications port only see CONTROL Command Control Remote Bit on page U 7 14 The outputs of the remote control switches in Figure 4 27 are Relay Word bits RBn n 1 to 8 called remote bits Use these remote bits in SELOGIC control e...

Page 113: ... OFF position corresponding remote bit is deasserted to logical 0 before a settings change it comes back in the OFF position corresponding remote bit is still deasserted to logical 0 after the change Remote Control Switch MOMENTARY Position This subsection describes how to operate remote bit RB3 as a momentary switch You can make RB1 RB8 operate in the same way The CON 3 command and PRB 3 subcomma...

Page 114: ...is stored in nonvolatile memory but the relay de energizes the output contact When power to the relay is restored the programmable output contact will go back to the state of the latch control switch after relay initialization Traditional latching relay output contact states are changed by pulsing the latching relay inputs see Figure 4 28 Pulse the set input to close set the latching relay output ...

Page 115: ...he limit can result in an EEPROM self test failure An average of 70 cumulative latch bit state changes per day can be made for a 25 year relay service life Settings SETn and RSTn cannot result in continuous cyclical operation of latch bit LTn Use timers to qualify conditions set in settings SETn and RSTn If you use any optoisolated inputs in settings SETn and RSTn the inputs each have a separate d...

Page 116: ...valuates the NOT operation of SV04 first and uses the result in subsequent evaluation of the expression Operator precedence is shown in Table 4 52 Timers Reset When Power Lost or Settings Changed If the relay loses power or settings change the SELOGIC control equation variables timers reset Relay Word bits SVn and SVnT n 1 8 reset to logical 0 after power restoration or a settings change Figure 4 ...

Page 117: ...pens An a contact output is open when the output coil is de energized and closed when the output coil is energized A b contact output is closed when the output contact coil is de energized and open when the output contact coil is energized Output contact pickup dropout time is 8 ms Configuring an Output as an Alarm Output Contact Refer to Figure 4 32 and Self Test on page 10 11 Use the SALARM and ...

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Page 119: ...otor operating statistics report available using either the front panel the serial port or the optional DeviceNet port Also helpful in preventive maintenance tasks the SEL 749M calculates and stores motor starting information The relay retains motor start reports for the five latest motor starts The motor start trending function stores motor start averages for the last eighteen 30 day periods Mete...

Page 120: ... Option Meter Values All Models Line Currents IA IB IC and IN Core Balance Ground Fault Current magnitudes A and phase angles deg IG Residual Ground Fault Current magnitude A and phase angle deg IM Average Current Magnitude Average Motor Load x FLA Negative Sequence Current 3I2 Current Imbalance System Frequency Hz With Voltage Option VAB VBC VCA or VAN VBN VCN VG magnitudes V and phase angles deg...

Page 121: ...e deg 0 0 119 7 120 9 143 6 Average Phase V 2383 Negative Seq Volt 3V2 V 30 6 Voltage Imbalance 0 1 Real Power kW 1212 Reactive Power kVAR 762 Apparent Power kVA 1432 Power Factor 0 85 LAG Frequency Hz 60 0 Figure 5 1 METER Command Report With Voltage Option MET T Enter SEL 749M Date 02 27 2007 Time 17 04 56 974 MOTOR RELAY Time Source internal Max Winding RTD 135 C Max Bearing RTD 123 C Ambient R...

Page 122: ...tion The implications of this convention are depicted in Figure 5 3 Figure 5 3 Complex Power Measurement Conventions Motor Action In the SEL 749M reported positive real power is always into the motor Power Into Motor Q VAR I leads V W VAR PF LAG I lags V W VAR PF LEAD P W I leads V W VAR PF LEAD I lags V W VAR PF LAG M SEL 749M Relay Source Bus Direction of Positive Real Power Motor Courtesy of Na...

Page 123: ...erage Peak Start Time s 9 1 9 3 Max Start I A 1079 1152 Min Start V V 4113 4111 Start TCU 91 8 93 6 Running TCU 90 9 93 8 Running Cur A 224 9 242 2 Running kW 1362 1467 Running kVARin 854 3 922 7 Running kVARin 854 3 922 7 Running kVA 1607 1732 Alarms Trips Overload 0 0 Locked Rotor 0 0 Undercurrent 0 0 Jam 0 0 Current Imbal 0 0 Overcurrent 0 0 Ground Fault 0 0 Speed Switch 0 0 Undervoltage 0 0 Ov...

Page 124: ...etected until the running state is declared see Figure 4 22 The TCU value is the thermal element capacity used at the end of the start expressed in percent of the trip value Start Data The motor start data is taken periodically after the starting current is detected The relay stores 720 sets of the data with the period determined by the setting MSRR motor start report resolution The following data...

Page 125: ...tor Start Trending For each motor start the relay stores a motor start report and adds this data described in Summary Data on page 5 6 to the motor start trending buffer Motor start trending tracks motor start data for the past eighteen 30 day periods For each 30 day interval the relay records the following information the date the interval began the total number of starts in the interval the aver...

Page 126: ...M Date 02 27 2007 Time 11 35 24 049 MOTOR RELAY Time Source internal Began Number Start Start Max Min Record on of Time TCU Start I Start V Number Date Starts s A V 1 11 17 2003 2 9 1 92 1079 4113 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Figure 5 6 Motor Start Trending Report Example Courtesy of NationalSwitchgear com ...

Page 127: ...ttings Sheets at the end of this section list all SEL 749M settings the setting definitions and input ranges Refer to Section 4 Protection and Logic Functions for detailed information on individual elements and settings Table 6 1 Methods of Accessing Settings Serial Port Commandsa a Refer to Section 7 Communications for detailed information on set up and use of the serial communications port Front...

Page 128: ...LAY settings as listed in the SEL 749M Settings Sheets Use the Up Arrow and Down Arrow and the Left Arrow and Right Arrow pushbuttons to scroll through the relay settings and view change them according to your needs by selecting and editing them After viewing changing the RELAY settings press the ESC pushbutton until the following message appears Select and enter the appropriate command by pushing...

Page 129: ... Reset Access Lvl Set Show Menu RELAY LOGIC GLOBAL PORT FRONT PANEL REPORT RESTORE DEFAULTS PASSWORD RELAY Menu Main Settings Thermal Overload Trip Close Logic Motor Control Main Settings Menu RID SEL 749M FLA1 250 0 A DELTA_Y DELTA PHASE ROTATION Menu MOTOR FLA FLA1 0250 0 A Press to move within the list Press to return to the previous list Press to select an underlined menu item Courtesy of Nati...

Page 130: ... A Enter Settings The SET command available from Access Level 2 allows you to view or change settings Table 6 3 lists the SET command options When you issue the SET command the relay presents a list of settings one at a time Enter a new setting or press Enter to accept the existing setting Editing keystrokes are listed in Table 6 4 Table 6 2 SHOW Command Options Command Description SHOW Show relay...

Page 131: ...ve interdependency checks with other settings The relay checks setting interdependencies after you answer Y to the Saves Settings prompt but before the settings are stored If any of these checks fail the relay issues one of the error messages shown in Table 6 6 and returns you to the settings list for a correction Table 6 4 SET Command Editing Keystrokes Press Key s Results Enter Retains the setti...

Page 132: ...ral Overcurrent Modify the 50NnP or CTRN setting to satisfy the requirement shown in the error message 50NnP must be within 0 010 CTRN xx xx and 2 0 CTRN yy yy n 1 or 2 Neutral Overcurrent Modify the 50NnP or CTRN setting to satisfy the requirement shown in the error message Choose PRE from 1 10 cycles Event Report Settings Modify the PRE setting to satisfy the requirement shown in the error messa...

Page 133: ...________ CT RATIO 2nd 1 5000 Hidden if E2SPEED N CTR2 _____________________ MOTOR FLA 2nd 0 2 5000 A Hidden if E2SPEED N FLA2 _____________________ NEUTRAL CT RATIO 1 2000 CTRN _____________________ PHASE PT RATIO 1 00 250 00 Hidden if voltages not included PTR _____________________ LINE VOLTAGE 100 30000 V Hidden if voltages not included VNOM _____________________ XFMR CONNECTION Delta Wye Hidden...

Page 134: ...xFLA 50P1P _____________________ PH OC TRIP DLAY 0 00 5 00 sec Hidden if 50P1P Off 50P1D _____________________ PH OC WARN LVL Off 0 10 20 00 xFLA 50P2P _____________________ PH OC WARN DLAY 0 00 5 00 sec Hidden if 50P2P Off 50P2D _____________________ Neutral Overcurrent NEUT OC TRIP LVL Off 0 01 25 00 A 50N1P _____________________ NEUT OC TRIP DLAY 0 00 5 00 sec Hidden if 50N1P Off 50N1D ________...

Page 135: ...______ CI WARN DELAY 0 240 sec Hidden if 46UBA Off 46UBAD _____________________ Protection Disable PROT INHIBT TIME Off 1 240 sec PROTBL_T _____________________ OL INHIBIT TIME Off 1 240 sec THERBL_T _____________________ Start Monitoring START MOTOR TIME Off 1 240 sec START_T _____________________ Star Delta STAR DELTA ENABL Y N ESTAR_D _____________________ MAX STAR TIME Off 1 600 sec Hidden if ...

Page 136: ...___________ RTD3 TYPE PT100 NI100 NI120 CU10 Hidden if RTD3LOC Off RTD3TY _____________________ RTD3 TRIP LEVEL Off 1 250 C Hidden if RTD3LOC Off TRTMP3 _____________________ RTD3 WARN LEVEL Off 1 250 C Hidden if RTD3LOC Off ALTMP3 _____________________ RTD4 LOCATION Off WDG BRG AMB OTH RTD4LOC _____________________ RTD4 TYPE PT100 NI100 NI120 CU10 Hidden if RTD4LOC Off RTD4TY ____________________...

Page 137: ...0 CU10 Hidden if RTD9LOC Off RTD9TY _____________________ RTD9 TRIP LEVEL Off 1 250 C Hidden if RTD9LOC Off TRTMP9 _____________________ RTD9 WARN LEVEL Off 1 250 C Hidden if RTD9LOC Off ALTMP9 _____________________ RTD10 LOCATION Off WDG BRG AMB OTH RTD10LOC _____________________ RTD10 TYPE PT100 NI100 NI120 CU10 Hidden if RTD10LOC Off RTD10TY _____________________ RTD10 TRIP LEVEL Off 1 250 C Hi...

Page 138: ... not included OV TRIP LEVEL Off 1 00 1 20 xVnm 59P1P _____________________ OV TRIP DELAY 0 0 120 0 sec Hidden if 59P1P Off 59P1D _____________________ OV WARN LEVEL Off 1 00 1 20 xVnm 59P2P _____________________ OV WARN DELAY 0 0 120 0 sec Hidden if 59P2P Off 59P2D _____________________ VAR Hidden if voltages not included NEG VAR TRIP LEV Off 1 25000 kVAR NVARTP _____________________ POS VAR TRIP ...

Page 139: ...______ FREQ1 WARN LEVEL Off 55 0 65 0 Hz 81D1AP _____________________ FREQ1 WARN DELAY 0 0 240 0 sec Hidden if 81D1AP Off 81D1AD _____________________ FREQ2 TRIP LEVEL Off 55 0 65 0 Hz 81D2TP _____________________ FREQ2 TRIP DELAY 0 0 240 0 sec Hidden if 81D2TP Off 81D2TD _____________________ FREQ2 WARN LEVEL Off 55 0 65 0 Hz 81D2AP _____________________ FREQ2 WARN DELAY 0 0 240 0 sec Hidden if 8...

Page 140: ...gic MIN TRIP TIME 0 0 400 0 sec TDURD _____________________ TRIP EQUATION SV TR ______________________________________________________________________ REMOTE TRIP EQN SV REMTRIP ______________________________________________________________________ UNLATCH TRIP EQN SV ULTRIP ______________________________________________________________________ CONTACTOR STATUS SV 52A _____________________________...

Page 141: ...____________________ SET04 SV Hidden if ELAT N or 4 SET04 ______________________________________________________________________ RST04 SV Hidden if ELAT N or 4 RST04 ______________________________________________________________________ SET05 SV Hidden if ELAT N or 5 SET05 ______________________________________________________________________ RST05 SV Hidden if ELAT N or 5 RST05 __________________...

Page 142: ..._____________________ SV TIMER PICKUP 0 00 3000 00 sec Hidden if ESV N or 4 SV04PU _____________________ SV TIMER DROPOUT 0 00 3000 00 sec Hidden if ESV N or 4 SV04DO _____________________ SV INPUT EQ SV Hidden if ESV N or 4 SV04 ______________________________________________________________________ SV TIMER PICKUP 0 00 3000 00 sec Hidden if ESV N or 5 SV05PU _____________________ SV TIMER DROPOUT...

Page 143: ..._____________________________________ OUT401 FAIL SAFE Y N Hidden if I O expansion card is not included OUT401FS _____________________ OUT401 SV Hidden if I O expansion card is not included OUT401 ______________________________________________________________________ OUT402 FAIL SAFE Y N Hidden if I O expansion card is not included OUT402FS _____________________ OUT402 SV Hidden if I O expansion c...

Page 144: ...eneral PHASE ROTATION ABC ACB PHROT RATED FREQ 50 60 Hz FNOM _____________________ DATE FORMAT MDY YMD DMY DATE_F _____________________ Data Reset TARGET RESET EQ SV RSTTRGT ______________________________________________________________________ Access Control DISABLE SETTINGS SV DSABLSET ______________________________________________________________________ Courtesy of NationalSwitchgear com ...

Page 145: ...E Y N Hidden if PROTO MOD AUTO _____________________ HDWR HANDSHAKING Y N Hidden if PROTO MOD RTSCTS _____________________ FAST OP MESSAGES Y N Hidden if PROTO MOD FASTOP _____________________ MODBUS SLAVE ID 1 248 Hidden if PROTO SEL SLAVEID _____________________ NOTE Modbus protocol is available in either Port 3 or Port 4 but not both Port 4 Hidden if DeviceNet communications card is detected CO...

Page 146: ...when DeviceNet card is used These settings can be viewed by using either the STA serial port command or the front panel menu item Status The settings can be changed only at the rear of the relay on the DeviceNet card MAC_ID 0 63 MAC_ID _____________________ ASA 8 hex characters assigned by factory ASA _____________________ DN_Rate 125 250 500 kbps Auto DN_Rate _____________________ Courtesy of Nat...

Page 147: ...____ CLOSE RESET LEDS Y N RSTLED _____________________ Target LED TRIP LATCH T_LED Y N T01LEDL _____________________ LED1 EQUATION SV T01_LED ______________________________________________________________________ TRIP LATCH T_LED Y N T02LEDL _____________________ LED2 EQUATION SV T02_LED ______________________________________________________________________ TRIP LATCH T_LED Y N T03LEDL ___________...

Page 148: ..._____________ SER2 SER2 ______________________________________________________________________ SER3 SER3 ______________________________________________________________________ SER4 SER4 ______________________________________________________________________ Event Report EVENT TRIGGER SV ER ______________________________________________________________________ EVENT LENGTH 15 64 cyc LER ____________...

Page 149: ...connections The remainder of the section describes the ASCII commands used with the EIA 232 serial port s Communications Interfaces The SEL 749M physical interfaces are shown in Table 7 1 Several optional SEL devices are available to provide alternative physical interfaces including EIA 485 and fiber optic cable Table 7 1 SEL 749M Port Interfaces Port Serial Port Interface PORT 1 Reserved PORT 2 R...

Page 150: ...e demodulated IRIG B time code input One physical interface is via terminals B01 and B02 and the other is part of the serial Port 3 physical interface Only one interface can be used at a time When using serial Port 3 connect to an SEL communications processor with Cable C273A see the cable diagrams that follow in this section or SEL 5801 Cable Selector software 5 Vdc Power Supply Port power can pr...

Page 151: ...y for more information SEL 749M Cable Connections to Communications Devices Figure 7 2 SEL Cable C234A SEL 749M to DTE Device Table 7 2 EIA 232 EIA 485 Serial Port Pin Functions Pina a For EIA 485 the pin numbers represent relay terminals CO1 through C05 Port 3 EIA 232 Port 4C EIA 232 Port 4A EIA 485a Port F EIA 232 1 5 Vdc 5 Vdc TX N C 2 RXD RXD RX TX RXD 3 TXD TXD TX RX TXD 4 IRIG N C RX N C 5 G...

Page 152: ... Func Pin Pin DTE Device DTE Data Terminal Equipment Computer Terminal etc SEL 749M Relay 9 Pin Male D Subconnector 25 Pin Female D Subconnector 5 3 7 2 8 9 7 2 20 3 8 1 GND TXD RTS RXD CTS GND GND TXD IN DTR IN RXD OUT CD OUT GND Pin Func Pin Func Pin Pin DCE Device DCE Data Communications Equipment Modem etc SEL Communications Processor 9 Pin Male D Subconnector 9 Pin Male D Subconnector 2 3 5 7...

Page 153: ...S N the relay permanently asserts the RTS line If RTSCTS Y the relay deasserts RTS when it is unable to receive characters If RTSCTS Y the relay does not send characters until the CTS input is asserted Protocols The SEL 749M supports the protocols and command sets shown in Table 7 3 Other Devices 120 Ω 1nF 120 Ω Characteristic Twisted Shielded Pair Connect Shield to Ground at One Point Only SEL 74...

Page 154: ...Communications Protocol DeviceNet The SEL 749M provides DeviceNet support DeviceNet is an optional protocol described in Appendix E DeviceNet SEL ASCII Protocol Details Message Format SEL ASCII protocol is designed for manual and automatic communication All commands the relay receives must be of the following form command CR or command CRLF A command transmitted to the relay consists of the comman...

Page 155: ...ission You can send control characters from most keyboards with the following keystrokes XOFF Ctrl S hold down the Ctrl key and press S XON Ctrl Q hold down the Ctrl key and press Q CAN Ctrl X hold down the Ctrl key and press X Automatic Messages When the serial port AUTO setting is Y the relay sends automatic messages to indicate specific conditions The automatic messages are described in Table 7...

Page 156: ...t See the SEL 749M Relay Command Summary at the end of this manual for the commands available from Access Level 1 The relay can go to Access Level 2 from this level The 2AC command places the relay in Access Level 2 See Access Commands ACCESS and 2ACCESS for more detail Enter the 2AC command at the Access Level 1 prompt 2AC Enter Access Level 2 When the relay is in Access Level 2 the SEL 749M send...

Page 157: ...it breaker number n 1 or 2 remote bit number nn 1 8 and level Command options appear with brief explanations about the command function Refer to the references listed with the commands for more information on the control function corresponding to the command or examples of the control response to the command You can simplify the task of entering commands by shortening any ASCII command to the firs...

Page 158: ...ts Passwords are required if they are not disabled See PASSWORD Command View Change Passwords on page U 7 19 for the list of default passwords and for more information on changing and disabling passwords Access Level Attempt Password Required Assume the following conditions Access Level 1 password is not disabled Access Level is 0 At the Access Level 0 prompt enter the ACC command ACC Enter Becaus...

Page 159: ... demonstrate going from Access Level 0 to Access Level 1 The procedure to go from Access Level 1 to Access Level 2 with the 2AC command entered at the access level screen prompt is similar The relay pulses the SALARM Relay Word bit for one second after a successful Level 2 access or if access is denied ANALOG Command Use the ANALOG p t command to test the relay analog current output When you use t...

Page 160: ...ata from other Compressed ASCII commands Upon receiving the CAS command the relay responds with the configurations of all Compressed ASCII commands CEV CHI CST and CSU The configuration message for only the CHI command is shown below as an example CAS CAS 4 yyyy CR CHI 1 yyyy CR 1H FID yyyy CR 1D 45S yyyy CR 11H REC_NUM MONTH DAY YEAR HOUR MIN SEC MSEC EVENT CURR TARG ETS yyyy CR 30D I I I I I I I...

Page 161: ...68 CR ETX Table 7 11 CEVENT Command Compressed Event Report Command Description Access Level CEV n Return the n event report with4 samples cycle data of the first 15 cycles 1 CEV n L Return the n event report with 4 samples cycle data of the entire event stored 15 or 64 cycles 1 CEV n R Return the n event report with raw unfiltered 16 samples cycle analog data and 4 samples cycle digital data stor...

Page 162: ...U command retrieves the event summary information from the last event report in Compressed ASCII format See Section 9 Analyzing Events Table 7 15 CONTROL Command Command Description Access Level CON na a Parameter n is a number from 1 to 8 representing RB1 RB8 First step of a two command sequence The SEL 749M will prompt for the second step subcommand shown below 2 Table 7 16 CONTROL Subcommands S...

Page 163: ...mmand The FIL command provides a safe and efficient means of transferring files between intelligent electronic devices IEDs and external support software ESS Use the FIL commands for sending settings to the SEL 749M and receiving settings from the relay Table 7 19 Date Command Command Description Access Level DATE Display the internal clock date 1 DATE date Set the internal clock date DATE_F set t...

Page 164: ... Level FIL DIR Return a list of files 1 FIL READ filename Transfer settings file filename from the relay to the PC 1 FIL WRITE filename Transfer settings file filename from the PC to the relay 2 FIL SHOW filename Filename 1 displays contents of the file filename 1 Table 7 24 HISTORY Command Command Description Access Level HIS Return event histories with the oldest at the bottom of the list and th...

Page 165: ...y divides the displayed information into two groups NOTE All ASCII command responses in this section are examples only Your specific relay will have differences based on model number firmware revision number and application Instantaneous Thermal and RTD METER k Instantaneous Metering The MET k command displays instantaneous magnitudes and angles if applicable of the measured and calculated analog ...

Page 166: ...n is 9999 seconds The relay also displays starts available and time to reset MOTOR Command The MOT command displays motor operating statistics including the following Motor running time stopped time and percent time running Total number of motor starts Number of emergency starts Section 5 Metering and Monitoring includes additional details on the motor operating statistics report Issuing the MOT R...

Page 167: ...ge each default password to a private password may allow unauthorized access SEL shall not be responsible for any damage resulting from unauthorized access WARNING Use the PAS command to inspect or change existing passwords Table 7 31 MSR Motor Start Report Command Command Description Access Level MSR n Return the n motor start report where n is event number The n defaults to 1 where 1 is the most...

Page 168: ...red the passwords correctly Make sure that the passwords are what you intended and record the new passwords To recover lost passwords press the Left Arrow and Right Arrow pushbuttons for 10 seconds to disable passwords Reenter the PAS command and new passwords as previously described Pressing the Left Arrow and Right Arrow pushbuttons for 10 seconds toggles the PASSWORD DISABLE ENABLE if passwords...

Page 169: ... to display a chronological or reverse chronological subset of the SER rows 1 SER C Use this command to clear reset the SER records 1 SER R Use this command to clear reset the SER records 1 Table 7 40 SER Command Format Parameter Description row1 Append row1 to return a chronological progression of the first row1 rows For example use SER 5 to return the first five rows row1 row2 Append row1 and ro...

Page 170: ...vel SET s TERSE Set the Group settings beginning at the first setting 2 SET L s TERSE Set general logic settings 2 SET G s TERSE Set global settings 2 SET P n s TERSE Set serial port settings n specifies the port 3 4 or F n defaults to the active port if not listed 2 SET R s TERSE Set report settings such as Sequential Events Recorder SER and Event Report ER settings 2 SET F s TERSE Set front pane...

Page 171: ... 37PAP OFF 55LGTP OFF 55LDTP OFF 55LGAP OFF 55LDAP OFF 81D1TP OFF 81D1AP OFF 81D2TP OFF 81D2AP OFF LOAD OFF AOPARM LOAD_I BLKPROT 0 BLK46 N BLK48 N BLK50EF N BLK50P N BLK37 N BLK66 N BLK49PTC N BLK49RTD N TDURD 0 5 TR 49T OR LOSSTRIP OR JAMTRIP OR 46UBT OR 50P1T OR 50G1T OR 59P1T OR 47T OR 55T OR SPDSTR OR 50N1T OR SMTRIP OR 81D1T OR 81D2T OR SV01T REMTRIP 0 ULTRIP 0 52A NOT IN101 STREQ 0 EMRSTR I...

Page 172: ...RA 37PA 27P2T 0C67 59P2T SPDSAL 81D1A 81D2A OTHALRM AMBALRM SALARM WARNING 10B3 LOADUP LOADLOW 50P2T STOPPED RUNNING STARTING STAR DELTA 11E2 START SPEED2 0411 STATUS Command Relay Self Test Status The STA command displays the status report Refer to Section 10 Testing and Troubleshooting for self test thresholds and corrective actions as well as hardware configuration conflict resolution Table 7 4...

Page 173: ...mming unsuccess ful or Front Panel FPGA failed OK WARN RAM Volatile memory integrity OK FAIL ROM Firmware integrity OK FAIL CR_RAM Integrity of settings in RAM and code that runs in RAM OK FAIL Non_Vol Integrity of data stored in nonvolatile mem ory OK FAIL Clk_Bat Clock battery integrity OK WARN Clock Clock functionality OK WARN PTC Integrity of PTC OK FAIL RTD Integrity of RTD module communicati...

Page 174: ...st in reverse chronological order of all the archived event summary reports maximum of five events An example event summary report is in Figure 7 11 Each event summary report shows the date time current magnitudes primary values frequency and if the relay has the voltage option voltage magnitudes primary values The relay reports the voltage and current when the largest current occurs during the ev...

Page 175: ...y Word rows are described in Table G 1 and Table G 2 Relay Word bits are used in SELOGIC control equations See Appendix G Relay Word Bits The TAR command does not remap the front panel target LEDs as is done in some previous SEL relays Table 7 52 TARGET Command Display Relay Word Bit Status Command Description Access Level TAR name ROW TAR n k ROW Use TARGET without parameters to display Relay Wor...

Page 176: ...le clock and displays the time you just entered If you enter an invalid time the SEL 749M responds Invalid Time TRIGGER Command Trigger Event Report Use the TRI command to trigger the SEL 749M to record data for high resolution oscillography and event reports When you issue the TRI command the SEL 749M responds Triggered If the event did not trigger within 1 second the relay responds Did not trigg...

Page 177: ...ol functions The SEL 749M features a straightforward menu driven control structure presented on the front panel liquid crystal display LCD Front panel targets and other LED indicators give a quick look at SEL 749M operation status The features that help you operate the relay from the front panel include the following Reading metering Inspecting targets Accessing settings Controlling relay operatio...

Page 178: ...s is a short cut for changing the LCD contrast setting FP_CONT in the front panel settings Front Panel Automatic Messages The relay displays automatic messages under the conditions described in Table 8 1 NOTE See the Preface for an explanation of typographic conventions used to describe menus the front panel display and the front panel pushbuttons Table 8 1 Front Panel Automatic Messages Condition...

Page 179: ...n the control logic In the figures that follow restricted activities are indicated by the padlock symbol shown in Figure 8 2 Figure 8 2 Access Level Security Padlock Symbol Before you can perform a front panel menu activity that is marked with the padlock symbol you must enter the correct Access Level 2 passwords After you have correctly entered the password you can perform other Access Level 2 ac...

Page 180: ...access to most of the information that the relay measures and stores You can also use front panel controls to view or modify relay settings All of the front panel functions are accessible through use of the six button keypad and LCD display Use the keypad shown in Figure 8 4 to maneuver within the front panel menu structure described in detail throughout the remainder of this section Table 8 2 des...

Page 181: ...cape from the current menu or display Displays additional information if lockout condition exists Hold for 2 seconds to display contrast adjustment screen ENT Move from the rotating display to the MAIN menu Select the menu item at the cursor Select the displayed setting to edit that setting Table 8 2 Front Panel Pushbutton Functions Pushbutton Function Continued on next page Display Events Menu DI...

Page 182: ...ess Lvl Reset etc etc Relay Menu Port Menu RELAY Main Settings Thermal Overload Phase Overcurr Neutral Overcurr Residual Overcur Jam Settings Undercurrent Set PORT Port F Port 3 Port 4 Main Settings Menu Set Port F Menu Main Settings RID TID CTR1 FLA1 Thermal Overload E49MOTOR SETMETH 49RSTP PORT F SPEED BITS PARITY Set Show Menu SET SHOW RELAY LOGIC GLOBAL PORT FRONT PANEL REPORT RESTORE DEFAULTS...

Page 183: ...s Use the following features to monitor the relay during operation and testing Control Menu The SEL 749M provides great flexibility in control through the MAIN Control menu Use the front panel CONTROL menu for the following control actions Stop Motor Initiates STOP input to the Stop Trip Logic see Figure 4 20 Emergency Restrt Asserts Relay Word EMRSTR to initiate an emergency start see Figure 4 23...

Page 184: ...item on the MAIN menu to view or modify the settings refer to SEL 749M Menu Structure on page 8 5 Step 2 Select the settings class date time or password settings from the SET SHOW menu Each settings class includes headings that create subgroups of associated settings These headings are displayed in the settings screen captures in Section 6 Settings Select the heading that contains the setting of i...

Page 185: ...tion and Target LEDs Programmable LEDs The SEL 749M provides quick confirmation of relay conditions via operation and target LEDs Figure 8 7 shows this region with factory default text on the front panel configurable labels Figure 8 7 Factory Default Front Panel LEDs You can reprogram all of these indicators except the ENABLED and TRIP LEDs to reflect operating conditions other than the factory de...

Page 186: ...the SEL 749M latches the trip involved target LEDs except for the ENABLED LED Press the TARGET RESET pushbutton to reset the latched target LEDs When a new trip event occurs and the previously latched trip targets have not been reset the relay clears the latched targets and displays the new trip targets Pressing and holding the TARGET RESET pushbutton illuminates all the LEDs Upon release of the T...

Page 187: ...s pressed The target LEDs return to a normal operational state after release of the TARGET RESET pushbutton Other Target Reset Options Use the ASCII command TAR R to reset the target LEDs see TARGET Command Display Relay Word Bit Status on page U 7 27 for more information Programming specific conditions in the SELOGIC control equation RSTTRGT is another method for resetting target LEDs Access RSTT...

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Page 189: ...able automatic messaging to allow the relay to send event summaries out a serial port when port setting AUTO Y A summary provides a quick overview of an event The summaries may also be retrieved by using the SUMMARY command Event History The relay keeps an index of stored nonvolatile event reports Use the HISTORY command to obtain this index The index includes some of the event summary information...

Page 190: ...tored in addition to the automatically generated triggers for relay power up settings changes and active setting group changes State changes are time tagged to the nearest millisecond SER report data are useful in commissioning tests and during operation for system monitoring and control SER information is stored when state changes occur Event Reporting Length The SEL 749M provides selectable even...

Page 191: ... Event Summaries For every triggered event the relay generates and stores an event summary The relay stores the most recent 22 if event report length setting LER 15 or 4 if LER 64 event summaries When the relay stores a new event summary it discards the oldest event and event summary if the event memory is full Event summaries contain the following information Relay and Terminal Identification RID...

Page 192: ...e logic used to determine event types are shown in Table 9 1 Table 9 1 Event Types Sheet 1 of 2 Event Type Event Type Logic Overload Trip 49T AND RUNNING AND TRIP Lockd Rotor Trip 49T AND STARTING AND TRIP Undercurr Trip LOSSTRIP AND TRIP Jam Trip JAMTRIP AND TRIP Curr Imbal Trip 46UBT AND TRIP Overcurrent Trip 50P1T AND TRIP Ground Flt Trip 50N1T OR 50G1T AND TRIP Speed Sw Trip SPDSTR AND TRIP Ov...

Page 193: ...ading in each RTD group The hottest RTD temperatures in degrees centigrade C are listed below Winding Bearing Ambient Other Event History The event history report gives you a quick look at recent relay activity The relay labels each new event in reverse chronological order with 1 as the most recent event See Figure 9 2 for a sample event history Use this report to view the events that are presentl...

Page 194: ...ach event report includes four sections Analog values of current voltage and digital states of the various Relay Word bits Digital states of the protection and control elements including overcurrent and voltage elements plus status of digital output and input states Event Summary Settings in service at the time of event trigger consisting of Group Logic Global and Report settings classes Use the E...

Page 195: ...ns NOTE Figure 9 3 on page 9 11 is on multiple pages Refer to the example event report in Figure 9 3 to view event report columns This example event report displays rows of information each 1 4 cycle Retrieve this report with the EVE command The columns contain ac current ac voltage input output and protection and control element information Use the serial port SUM command see SUMMARY Command on p...

Page 196: ...D 50G2T 50G1T AND 50G2T O C 50N 1 2 b 50N1T AND NOT 50N2T NOT 50N1T AND 50N2T 50N1T AND 50N2T RTD Wdg SEL 2600 RTD mod ule required w W WDGALRM AND NOT WDGTRIP WDGTRIP RTD Brg SEL 2600 RTD mod ule required b B BRGALRM AND NOT BRGTRIP BRGTRIP RTD Oth SEL 2600 RTD mod ule required o O OTHALRM AND NOT OTHTRIP OTHTRIP RTD Amb SEL 2600 RTD module required a A AMBALRM AND NOT AMBTRIP AMBTRIP RTD In 1 RT...

Page 197: ...mbers in Figure 9 3 correspond to the SER row numbers in Figure 9 6 The row explanations appear in Table 9 4 In Figure 9 3 an arrow in the column following the VCA column would identify the trigger row This is the row that corresponds to the Date and Time values at the top of the event report The asterisk in the column following the VCA column identifies the row with the maximum phase current The ...

Page 198: ...8 1135 0 93 0 16 7 0 0 1058 7 4170 1 2588 R 1 3 970 0 32 7 100 3 0 0 902 3 627 0 3331 R 1 3 1137 3 93 7 17 0 0 0 1060 7 4170 1 2585 R 1 3 970 3 35 0 97 3 0 0 908 0 626 1 3331 R 1 3 9 1137 0 95 0 15 7 0 0 1057 7 4169 0 2582 R 1 3 969 3 33 7 97 7 0 0 905 3 624 1 3332 R 1 3 1137 3 92 7 17 0 0 0 1061 7 4171 1 2584 R 1 3 969 7 33 0 97 3 0 1 905 3 623 0 3333 R 1 3 10 1135 0 95 0 15 7 0 0 1055 7 4170 1 2...

Page 199: ...F 27P1P 0 80 27P1D 0 5 27P2P OFF 59P1P 1 10 59P1D 0 5 59P2P OFF NVARTP OFF PVARTP OFF NVARAP OFF PVARAP OFF 37PTP OFF 37PAP OFF 55LGTP OFF 55LDTP OFF 55LGAP OFF 55LDAP OFF 81D1TP OFF 81D1AP OFF 81D2TP OFF 81D2AP OFF LOAD OFF AOPARM LOAD_I BLKPROT 0 BLK46 N BLK48 N BLK50EF N BLK50P N BLK37 N BLK66 N BLK49PTC N BLK49RTD N TDURD 0 5 TR 49T OR LOSSTRIP OR JAMTRIP OR 46UBT OR 50P1T OR 50G1T OR 59P1T OR...

Page 200: ...rted to phasor rms values Voltages are processed similarly Figure 9 4 Derivation of Event Report Current Values and RMS Current Values From Sampled Current Waveform In Figure 9 4 note that any two rows of current data from the event report in Figure 9 3 1 4 cycle apart can be used to calculate rms current values Event Report Column 970 1135 971 1135 1135 971 1135 970 IA 1 2 2 2 Multiply by 1 Multi...

Page 201: ...IA 1135 A is a real rms current value that relates to the phasor rms current value Equation 9 2 IA t IA 970 1135 971 1135 Event Report Column X Present Sample Magnitude X 1135 Y 971 Angle Arctan Arctan Y X 971 1135 40 5 Real Axis Axis Imaginary 1 4 cyc 971 2 1135 2 1493 Y Previous 1 4 Cycle NOTE The arctan function of many calculators and computing programs does not return the correct angle for th...

Page 202: ...Report on page U 7 21 for details on the SER command Example SER Report The example SER report in Figure 9 6 includes records of events that occurred before the beginning of the event summary report in Figure 9 3 SER 10 Enter SEL 749M Date 12 10 2003 Time 23 56 14 749 MOTOR RELAY Time Source internal FID SEL 749M R100 V0 Z001001 D20031210 CID 6FBD DATE TIME ELEMENT STATE 10 12 10 2003 22 56 14 629...

Page 203: ... and phase angle presented to the relay in primary values In addition the command shows power system frequency Compare these quantities against other devices of known accuracy The METER command is available at the serial ports and front panel display See Section 7 Communications and Section 8 Front Panel Operations The relay generates a 15 or 64 cycle event report in response to faults or disturba...

Page 204: ...anel removed work surfaces and personnel must be properly grounded or equipment damage may result CAUTION Step 1 Loosen eight 8 mounting and one ground screws on the back and remove the back cover Step 2 Remove the CT board from Slot Z Step 3 Locate jumpers JMP1 JMP4 and change them from Pin 1 2 Normal position to Pin 2 3 Low Level Test position Step 4 Locate connector J2 and connect low level sig...

Page 205: ...ent timer and function in these tests The following procedure is a guideline to help you enter settings into the SEL 749M and to verify that it is properly connected Modify the procedure as necessary to conform to your standard practices Use this procedure at initial relay installation you should not need to repeat it unless major changes are made to the relay electrical connections Required Equip...

Page 206: ... connections Step 11 Connect the ac test source current or voltage to the appropriate relay terminals Disconnect the current transformer and voltage transformer if present secondaries from the relay prior to applying test source quantities If you set the relay to accept phase to ground voltages DELTA_Y Wye set the current and or voltage phase angles as shown in Figure 10 2 If you set the relay to ...

Page 207: ...e from zero 0 to one 1 Step 18 Verify output contact operation a For each output contact set the input to Logic 1 This causes the output contact to close For example setting OUT101 1 causes the output OUT101 contact to close b Repeat the process for all contact outputs VC 120 120 PHROT ACB VB VA 120 120 VC VB VA PHROT ABC When setting PHROT ABC set angle Va angle Ia 0 set angle Vb angle Ib 120 set...

Page 208: ...y the following ac quantities by using the front panel METER or serial port METER command Phase current magnitudes should be nearly equal Phase current angles should be balanced have proper phase rotation and have the appropriate phase relationship to the phase voltages Step 25 If your relay is equipped with voltage inputs check the following Phase voltage magnitudes should be nearly equal Phase v...

Page 209: ...the front panel SET SHOW function or the serial port SHOW command record the CTR1 PHROT and FLA1 setting values Step 3 Set the phase current angles to apply balanced three phase currents in accordance with the PHROT setting Refer to Figure 10 2 Step 4 Apply the appropriate magnitude for each phase current as shown in Column 1 of Table 10 4 Table 10 3 Phase Current Measuring Accuracy I Applied A se...

Page 210: ... the serial port SHOW command record the CTR1 PTR and PHROT setting values Step 4 Apply the current and voltage quantities shown in Column 1 of Table 10 5 Values are given for PHROT ABC and PHROT ACB Step 5 Use the front panel METER function or the serial port MET command to verify the results Table 10 4 Current Unbalance Measuring Accuracy I Applied A secondary Expected Reading Actual Reading IA ...

Page 211: ... and voltage quantities shown in Column 1 of Table 10 6 Values are given for PHROT ABC and PHROT ACB Step 5 Use the front panel METER or the serial port MET command to verify the results Table 10 5 Power Quantity Accuracy Wye Voltages Applied Currents and Voltages Real Power kW Reactive Power kVAR Power Factor pf PHROT ABC Ia 2 5 26 Ib 2 5 146 Ic 2 5 94 Expected P 0 4523 CTR1 PTR Expected Q 0 2211...

Page 212: ... Vab 120 30 Vbc 120 90 Measured Measured Measured PHROT ACB Ia 2 5 26 Ib 2 5 94 Ic 2 5 146 Expected P 0 4677 CTR1 PTR Expected Q 0 2286 CTR1 PTR Expected pf 0 90 lag Vab 120 30 Vbc 120 90 Measured Measured Measured Table 10 7 Periodic Relay Checks Test Description Relay Status Use the front panel STATUS or serial port STATUS command to ver ify that the relay self tests have not detected any WARN o...

Page 213: ...M power up Performs a read write test on system RAM Yes Latched Status Fail RAM Failure External RAM run time Performs a read write test on system RAM Yes Latched Status Fail RAM Failure Internal RAM power up Performs a read write test on CPU RAM Yes Latched Status Fail RAM Failure Internal RAM run time Performs a read write test on CPU RAM Yes Latched Status Fail RAM Failure Critical RAM settings...

Page 214: ... battery voltage level No Not Latched RTC Chip Unable to communicate with clock or fails time keeping test No Not Latched RTC Chip Internal RAM Clock chip static RAM fails No Not Latched Mainboard FPGA power up Fail if mainboard Field Pro grammable Gate Array does not accept program Yes Latched Status Fail FPGA Failure Mainboard FPGA run time Fail on lack of data acquisition interrupts Yes Latched...

Page 215: ...display The relay is de energized Verify input power and fuse continuity The relay does not accurately measure voltages or currents Wiring error Verify input wiring Incorrect CTR1 CTRN or PTR setting Verify instrument transformer ratios con nections and associated settings Voltage neutral terminal N is not prop erly grounded Verify wiring and connections The relay does not respond to commands from...

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Page 217: ...rsal condition by adding negative sequence current magnitude to 50S element and to motor state logic Added hysteresis to 49A thermal alarm logic to eliminate occasional nuisance alarm due to chatter Added hysteresis to 50S element such that pickup is at 2 5 pu and dropout is at 2 4 pu Added Fast Meter protocol to front port Port F to support ACSELERATOR QuickSet SEL 5030 Software Added 8 DI card 8...

Page 218: ...or LOADUP and LOADLOW elements Corrected blocking of LOP function 20060126 SEL 749M R103 V0 Z002002 D20050623 Corrected possible error condition when reading event reports 20050623 SEL 749M R102 V0 Z002002 D20041027 Modified 50P and Undercurrent Load Loss element ranges Added Loss of Potential function Added Frequency in event reporting Lengthened passwords to 12 characters Added Time to Reset for...

Page 219: ...2 Revised and added I O Configuration subsection including 8 DI card option Section 3 Revised for the newly added SEL 749M HMI feature in the ACSELERATOR QuickSet Software Section 4 Revised Thermal Element Port Settings SET P Command Logic Functions and Optoisolated Inputs segments Section 6 Added Port 3 PROTOCOL and Modbus SLAVEID settings Appendix A Updated for firmware version R105 Appendix D R...

Page 220: ...d 50P and Undercurrent Load Loss element ranges Section 7 Described improved password protection Added STA S command explanation Added Frequency to Event Summary Section 8 Added flashing TRIP LED explanation Section 9 Added Frequency to Event Report Appendix A Updated for firmware version R102 Appendix D Modified 50P and Undercurrent Load Loss element ranges 20040216 Section 1 Updated product comp...

Page 221: ...cable Disk containing the firmware upgrade e g r101749m s19 file Upgrade Instructions The instructions below assume you have a working knowledge of your personal computer terminal emulation software In particular you must be able to modify your serial communications parameters baud rate data bits parity etc select transfer protocol XMODEM CRC and transfer files e g send and receive binary files St...

Page 222: ...e new firmware e g r101749m s19 The file transfer takes less than 5 minutes at 115200 baud After the transfer is complete the relay will reboot and return to Access Level 0 Figure B 1 shows the entire process L_D Enter Disable relay to receive firmware Y N Y Enter Are you sure Y N Y Enter Relay Disabled BAU 115200 Enter REC Enter Caution This command erases the firmware If you erase the firmware t...

Page 223: ... command verify all relay self test results are OK Step 13 Apply current and voltage signals to the relay Step 14 Issue the METER command verify that the current and voltage signals are correct Step 15 Autoconfigure the SEL 2032 SEL 2030 or SEL 2020 port if you have a Communications Processor connected This step reestablishes automatic data collection between the SEL 2032 SEL 2030 or SEL 2020 Comm...

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Page 225: ...hat precede the checksum field in the message The program that uses the data can detect transmission errors in the message by summing the characters of the received message and comparing this sum to the received checksum Most commands are available only in SEL ASCII or Compressed ASCII format Selected commands have versions in both standard SEL ASCII and Compressed ASCII formats Compressed ASCII r...

Page 226: ...cessor These SEL communications processors perform autoconfiguration by using a single data stream and SEL Compressed ASCII and binary messages In subsequent operations the SEL communications processor uses the binary data stream for Fast Meter and Fast Operate messages to populate a local database and to perform SCADA operations At the same time you can use the binary data stream to connect trans...

Page 227: ...SCADA HMI and other data consumers Access to the IEDs for engineering functions including configuration report data retrieval and control through local serial remote dial in and Ethernet network connections Distribution of IRIG B time synchronization signal to IEDs based on external IRIG B input internal clock or protocol interface Simultaneous collection of SCADA data and engineering connection t...

Page 228: ...n C or another general purpose computer language SEL communications processors offer the protocol interfaces listed in Table C 3 Table C 3 SEL Communications Processors Protocol Interfaces Protocol Connect to DNP3 Level 2 Slave DNP3 masters Modbus RTU Protocol Modbus masters SEL ASCII Fast Message Slave SEL protocol masters SEL ASCII Fast Message Master SEL protocol slaves including other communic...

Page 229: ...a communications processor than for many conversations required to collect data directly from each individual IED You can further reduce data latency by connecting any SEL communications processor directly to the SCADA master and eliminating redundant communication processing in the RTU The SEL communications processor is responsible for the protocol interface so you can install test and even upgr...

Page 230: ...rface In this example the SEL communications processor provides the following enhancements when compared to a system that employs only the multidrop network Ethernet access for IEDs with serial ports Backup engineering access through the dial in modem IRIG B time signal distribution to all station IEDs Integration of IEDs without Ethernet Single point of access for real time data for SCADA HMI and...

Page 231: ...onnected device is an SEL device CONFIG Y Allow autoconfiguration for this device PORTID Relay 1 Name of connected relaya a Automatically collected by the SEL communications processor during autoconfiguration BAUD 19200 Channel speed of 19200 bits per seconda DATABIT 8 Eight data bitsa STOPBIT 1 One stop bit PARITY N No parity RTS_CTS N Hardware flow control enabled TIMEOUT 30 Idle timeout that te...

Page 232: ...essages STARTUP ACC nOTTER n Automatically log in at Access Level 1 SEND_OPER Y Send Fast Operate messages for remote bit and breaker bit control REC_SER N Automatic sequential event recorder data collection disabled NOCONN NA No SELOGIC control equation entered to selectively block connections to this port MSG_CNT 2 Two automessages ISSUE1 P00 00 01 0 Issue Message 1 every second MESG1 20METER Co...

Page 233: ... float TCU 2019h float FREQ 201Bh float VAB 201Dh float VBC 201Fh float VCA 2021h float 2023h float VAVG 2025h float VIMB 2027h float P MW 2029h float Q MVAR 202Bh float S MVA 202Dh float PF 202Fh float WDG 2031h float BRG 2033h float AMB 2035h float OTH 2037h float Table C 8 Communications Processor METER Region Map Sheet 2 of 2 Item Starting Address Type Table C 9 Communications Processor TARGET...

Page 234: ...ommunications processor it automatically sets RB1 in the SEL 749M Breaker bit BR1 operates differently than remote bits There are no breaker bits in the SEL 749M For Circuit Breaker 1 when you set BR1 the SEL communications processor sends a message to the SEL 749M that asserts the motor stop bit STOP for one processing interval If you clear BR1 the SEL communications processor sends a message to ...

Page 235: ...mits at a time The master transmits a binary command that includes the address of the desired slave device All of the slave devices receive the message but only the slave device with the matching address responds The SEL 749M Modbus communication allows a Modbus master device to do the following Acquire metering monitoring and event data from the relay Control SEL 749M output contacts Read the SEL...

Page 236: ...errors listed in Table D 3 occur the relay assembles a response message that includes the exception code in the data field The relay sets the most significant bit in the function code field to indicate to the master that the data field contains an error code instead of the required data Table D 2 SEL 749M Modbus Function Codes Codes Description 03h Read Holding Registers 04h Read Input Registers 0...

Page 237: ...sponses to errors in the query are shown in Table D 5 04h Read Input Register Command Use function code 04h to read directly from the Modbus Register Map shown in Table D 23 You can read a maximum of 125 registers at once with this function code Most masters use 4X references with this function code If you are accustomed to 4X references with this function code for five digit addressing add 40001 ...

Page 238: ...dress 2 bytes Number of Registers to Read 2 bytes CRC 16 A successful response from the slave will have the following format 1 byte Slave Address 1 byte Function Code 04h 1 byte Bytes of data n n bytes Data 2 250 2 bytes CRC 16 Table D 7 Responses to 04h Read Input Register Query Errors Error Error Code Returned Communication Counter Increments Illegal register to read Illegal Data Address 02h Inv...

Page 239: ... Code 10h 2 bytes Starting Address 2 bytes Number of Registers to Write 1 byte Number of Bytes of Data n n bytes Data 2 bytes CRC 16 A successful response from the slave will have the following format 1 byte Slave Address 1 byte Function Code 10h 2 bytes Starting Address 2 bytes Number of Registers 2 bytes CRC 16 Table D 11 10h Preset Multiple Registers Query Error Messages Error Error Code Return...

Page 240: ...etting is hidden 2 DBL 32 bit 1 when the following setting is a fractional value of this setting 3 RA RAM only 1 when the setting is not saved in nonvolatile memory 4 RR Read only if running 1 when the setting is read only if in running operational state 5 P Power Cycle or Reset 1 when the setting change requires a power cycle or reset 6 0 Reserved 7 Extend Reserved to extend the descriptor table ...

Page 241: ... Errors Error Error Code Returned Communication Counter Increments Illegal parameter to read Illegal Address 02h Invalid Address ParameterValue Offset Multiplier Divisor value value Divisor Multiplier Base Offset Table D 16 61h Read Parameter Text Command Bytes Field Queries from the master must have the following format 1 byte Slave Address 1 byte Function Code 61h 2 bytes Parameter Number 2 byte...

Page 242: ...eld Queries from the master must have the following format 1 byte Slave Address 1 byte Function Code 62h 2 bytes Parameter Number 1 byte Enumeration Index 2 bytes CRC 16 A successful response from the slave will have the following format 1 byte Slave Address 1 byte Function Code 62h 2 bytes Parameter Number 1 byte Enumeration Index 16 bytes Enumeration Text 2 bytes CRC 16 Table D 19 61h Read Param...

Page 243: ...llowing format 1 byte Slave Address 1 byte Function Code 7Dh 2 bytes Status Information Register 2100h or 2101h based on Bit 3 in Control Command Word 1 byte Embedded Modbus Function n bytes Optional data to support the Modbus function 0 250 2 bytes CRC 16 Table D 21 7Dh Encapsulated Packet Query Errors Bytes Field Queries from the master must have the following format 1 byte Slave Address 1 byte ...

Page 244: ...on has failed The relay will also set ERROR REGISTER 4016h flags to indicate the type of error Parameters such as date and time can be changed with the appropriate registers by using Modbus Function Code 06h or 10h Controlling Output Contacts Using Modbus The SEL 749M includes registers for controlling some of the outputs See LOGIC COMMAND 2000h RESET COMMAND 2001h and registers in the Reset Setti...

Page 245: ...00 0 1 0 1 105 0006 RW TWO SPEED ENABLE 0 N 1 Y 0 1 1 106 0007 RW CT RATIO 2nd 1 5000 1 1 107 0008 RW MOTOR FLA 2nd A 2 50000 0 1 0 1 108 0009 RW NEUTRAL CT RATIO 1 2000 1 1 109 000A RW PHASE PT RATIO 100 25000 0 01 0 01 110 000B RW LINE VOLTAGE V 100 30000 1 1 111 000C RW XFMR CONNECTION 0 DELTA 1 WYE 0 1 1 112 Thermal Overload 000D RW OVERLOAD ENABLE 0 N 1 Y 0 1 1 113 000E RW THERMAL METHOD 0 RA...

Page 246: ... 1 1 132 0021 RW PH OC TRIP LVL xFLA 10 2000 0 01 0 01 133 0022 RW PH OC TRIP DLAY s 0 500 0 01 0 01 134 0023 RW PH OC WARN ENABL 0 N 1 Y 0 1 1 135 0024 RW PH OC WARN LVL xFLA 10 2000 0 01 0 01 136 0025 RW PH OC WARN DLAY s 0 500 0 01 0 01 137 Neutral Overcurrent 0026 RW NEUT OC TRIP EN 0 N 1 Y 0 1 1 138 0027 RW NEUT OC TRIP LVL A 1 2500 0 01 0 01 139 0028 RW NEU OC TRIP DLAY s 0 500 0 01 0 01 140...

Page 247: ...200 0 1 0 1 155 Undercurrent Settings 0038 RW UC TRIP ENABLE 0 N 1 Y 0 1 1 156 0039 RW UC TRIP LEVEL xFLA 10 100 0 01 0 01 157 003A RW UC TRIP DELAY s 4 1200 0 1 0 1 158 003B RW UC WARN ENABLE 0 N 1 Y 0 1 1 159 003C RW UC WARN LEVEL xFLA 10 100 0 01 0 01 160 003D RW UC WARN DELAY s 4 1200 0 1 0 1 161 003E RW UC START DELAY s 0 1500 1 1 162 Current Imbalance Settings 003F RW CI TRIP ENABLE 0 N 1 Y ...

Page 248: ...RW STARTS HR 0 Off 0 15 1 1 174 004B RW MIN OFF TIME 0 Off min 0 150 1 1 175 004C RW RESTART BLK TIME min 0 60 1 1 176 Phase Reversal Settings 004D RW PH REV ENABLE 0 N 1 Y 0 1 1 177 Speed Switch Settings 004E RW SS TRIP DELAY 0 Off s 0 240 1 1 178 004F RW SS WARN DELAY 0 Off s 0 240 1 1 179 PTC Settings 0050 RW PTC ENABLE 0 N 1 Y 0 1 1 180 RTD Settings 0051 RW RTD ENABLE 0 N 1 Y 0 1 1 181 0052 RW...

Page 249: ... NI120 3 CU10 0 3 1 187 0058 RW RTD2 TRIP LEVEL 0 Off C 0 250 1 1 188 0059 RW RTD2 WARN LEVEL 0 Off C 0 250 1 1 189 005A RW RTD3 LOCATION 0 OFF 1 WDG 2 BRG 3 AMB 4 OTH 0 4 1 190 005B RW RTD3 TYPE 0 PT100 1 NI100 2 NI120 3 CU10 0 3 1 191 005C RW RTD3 TRIP LEVEL 0 Off C 0 250 1 1 192 005D RW RTD3 WARN LEVEL 0 Off C 0 250 1 1 193 005E RW RTD4 LOCATION 0 OFF 1 WDG 2 BRG 3 AMB 4 OTH 0 4 1 194 Table D 2...

Page 250: ... NI120 3 CU10 0 3 1 199 0064 RW RTD5 TRIP LEVEL 0 Off C 0 250 1 1 200 0065 RW RTD5 WARN LEVEL 0 Off C 0 250 1 1 201 0066 RW RTD6 LOCATION 0 OFF 1 WDG 2 BRG 3 AMB 4 OTH 0 4 1 202 0067 RW RTD6 TYPE 0 PT100 1 NI100 2 NI120 3 CU10 0 3 1 203 0068 RW RTD6 TRIP LEVEL 0 Off C 0 250 1 1 204 0069 RW RTD6 WARN LEVEL 0 Off C 0 250 1 1 205 006A RW RTD7 LOCATION 0 OFF 1 WDG 2 BRG 3 AMB 4 OTH 0 4 1 206 Table D 2...

Page 251: ... NI120 3 CU10 0 3 1 211 0070 RW RTD8 TRIP LEVEL 0 Off C 0 250 1 1 212 0071 RW RTD8 WARN LEVEL 0 Off C 0 250 1 1 213 0072 RW RTD9 LOCATION 0 OFF 1 WDG 2 BRG 3 AMB 4 OTH 0 4 1 214 0073 RW RTD9 TYPE 0 PT100 1 NI100 2 NI120 3 CU10 0 3 1 215 0074 RW RTD9 TRIP LEVEL 0 Off C 0 250 1 1 216 0075 RW RTD9 WARN LEVEL 0 Off C 0 250 1 1 217 0076 RW RTD10 LOCATION 0 OFF 1 WDG 2 BRG 3 AMB 4 OTH 0 4 1 218 Table D ...

Page 252: ...11 TRIP LEVEL 0 Off C 0 250 1 1 224 007D RW RTD11 WARN LEVEL 0 Off C 0 250 1 1 225 007E RW RTD12 LOCATION 0 OFF 1 WDG 2 BRG 3 AMB 4 OTH 0 4 1 226 007F RW RTD12 TYPE 0 PT100 1 NI100 2 NI120 3 CU10 0 3 1 227 0080 RW RTD12 TRIP LEVEL 0 Off C 0 250 1 1 228 0081 RW RTD12 WARN LEVEL 0 Off C 0 250 1 1 229 0082 RW WIND TRIP VOTING 0 N 1 Y 0 1 1 230 0083 RW BEAR TRIP VOTING 0 N 1 Y 0 1 1 231 0084 RW TMP RT...

Page 253: ... 241 008E RW OV WARN ENABLE 0 N 1 Y 0 1 1 242 008F RW OV WARN LEVEL xVnm 100 120 0 01 0 01 243 0090 RW OV WARN DELAY s 0 1200 0 1 0 1 244 VAR Settings 0091 RW NEG VAR TRIP EN 0 N 1 Y 0 1 1 245 0092 RW NEG VAR TRIP LEV kVAR 1 25000 1 1 246 0093 RW POS VAR TRIP EN 0 N 1 Y 0 1 1 247 0094 RW POS VAR TRIP LEV kVAR 1 25000 1 1 248 0095 RW VAR TRIP DELAY s 0 240 1 1 249 0096 RW NEG VAR WARN EN 0 N 1 Y 0 ...

Page 254: ...1 264 00A5 RW PF TRIP DELAY s 0 240 1 1 265 00A6 RW PF LAG WARN ENABL 0 N 1 Y 0 1 1 266 00A7 RW PF LAG WARN LEVL 5 99 0 01 0 01 267 00A8 RW PF LD WARN ENABL 0 N 1 Y 0 1 1 268 00A9 RW PF LD WARN LEVEL 5 99 0 01 0 01 269 00AA RW PF WARN DELAY s 0 240 1 1 270 Frequency Settings 00AB RW FREQ1 TRIP ENABL 0 N 1 Y 0 1 1 271 00AC RW FREQ1 TRIP LEVEL Hz 450 650 0 1 0 1 272 00AD RW FREQ1 TRIP DELAY s 0 2400...

Page 255: ... LD CTL UPP ENABL 0 N 1 Y 0 1 1 284 00B9 RW LD CTL CUR UPPER xFLA 20 200 0 01 0 01 285 00BA RW LD CTL PWR UPPER kW 1 25000 1 1 286 00BB RW LD CTL TCU UPPER TCU 1 99 1 1 287 00BC RW LD CTL LOW ENABL 0 N 1 Y 0 1 1 288 00BD RW LD CTL CUR LOWER xFLA 20 200 0 01 0 01 289 00BE RW LD CTL PWR LOWER kW 1 25000 1 1 290 00BF RW LD CTL TCU LOWER TCU 1 99 1 1 291 Analog Output 00C0 RW ANALOG OUT SEL 0 LOAD_I 1...

Page 256: ...6 Output Contacts 00C5 RW OUT101 FAIL SAFE 0 N 1 Y 0 1 1 297 00C6 RW OUT102 FAIL SAFE 0 N 1 Y 0 1 1 298 00C7 RW OUT103 FAIL SAFE 0 N 1 Y 0 1 1 299 00C8 RW OUT401 FAIL SAFE 0 N 1 Y 0 1 1 300 00C9 RW OUT402 FAIL SAFE 0 N 1 Y 0 1 1 301 00CA RW OUT403 FAIL SAFE 0 N 1 Y 0 1 1 302 00CB RW OUT404 FAIL SAFE 0 N 1 Y 0 1 1 303 Event Report Settings 00CC RW EVENT LENGTH 0 15 1 64 cyc 0 1 1 304 00CD RW PREFAU...

Page 257: ... 1 310 00D3 RW SET TO DEFAULTS 0 Ready 1 Reset 0 1 1 311 00D4 RW RESET STAT DATA 0 Ready 1 Reset 0 1 1 312 00D5 RW RESET HIS DATA 0 Ready 1 Reset 0 1 1 313 00D6 RW RESET COMM CNTR 0 Ready 1 Reset 0 1 1 314 00D7 RW RESET MOT DATA 0 Ready 1 Reset 0 1 1 315 00D8 00DC R Reserved 0 1 1 316 320 Date Time Settings 00DD RW SET SEC 0 5999 0 01 0 01 321 00DE RW SET MIN 0 59 1 322 00DF RW SET HOUR 0 23 1 323...

Page 258: ...3 R VBC V 0 65535 1 343 00F4 R VBC ANGLE deg 1800 1800 0 1 344 00F5 R VCA V 0 65535 1 345 00F6 R VCA ANGLE deg 1800 1800 0 1 346 00F7 R AVERAGE LINE V 0 65535 1 347 00F8 R VAN V 0 65535 1 348 00F9 R VAN ANGLE deg 1800 1800 0 1 349 00FA R VBN V 0 65535 1 350 00FB R VBN ANGLE deg 1800 1800 0 1 351 00FC R VCN V 0 65535 1 352 00FD R VCN ANGLE deg 1800 1800 0 1 353 00FE R VG V 0 65535 1 354 00FF R VG A...

Page 259: ...1 376 0115 R RTD 10 C 32768 32767 1 377 0116 R RTD 11 C 32768 32767 1 378 0117 R RTD 12 C 32768 32767 1 379 0118 R RTD TCU 0 100 1 380 Overload Status 0119 R THERM CAP USED 0 9990 0 1 381 011A R TIME TO TRIP s 0 9999 1 382 011B R TIME TO RESET s 0 9999 1 383 011C R STARTS AVAILABLE 0 255 1 384 011D R Reserved 0 0 1 385 Motor Statistics 011E R ELAPSED TIME mm 0 59 1 386 011F R ELAPSED TIME hh 0 23 ...

Page 260: ...413 013A R RUNNING KVA kVA 0 65535 0 1 414 013B R MAX WDG TRD C degC 32768 32767 1 415 013C R MAX BRG TRD C degC 32768 32767 1 416 013D R AMBIENT RTD C degC 32768 32767 1 417 013E R MAX OTH RTD C degC 32768 32767 1 418 Peak Statistics 013F R START TIME S sec 0 9999 0 1 419 0140 R MAX START I A A 0 65535 1 420 0141 R MIN START V V V 0 65535 1 421 0142 R START TCU 0 9990 0 1 422 0143 R RUNNING TCU 0...

Page 261: ...unters 015F R OVERLOAD 0 65535 1 451 0160 R LOCKED ROTOR 0 65535 1 452 0161 R UNDERCURRENT 0 65535 1 453 0162 R JAM 0 65535 1 454 0163 R CURRENT IMBAL 0 65535 1 455 0164 R OVERCURRENT 0 65535 1 456 0165 R GROUND FAULT 0 65535 1 457 0166 R SPEED SWITCH 0 65535 1 458 0167 R UNDERVOLTAGE 0 65535 1 459 0168 R OVERVOLTAGE 0 65535 1 460 0169 R UNDERPOWER 0 65535 1 461 016A R POWER FACTOR 0 65535 1 462 0...

Page 262: ... SW TRIP 9 UNDERVOLT TRIP 10 OVERVOLT TRIP 11 UNDERPOWER TRIP 12 PWR FACTOR TRIP 13 REACT PWR TRIP 14 PHASE REV TRIP 15 UNDERFREQ TRIP 16 OVERFREQ TRIP 17 RTD TRIP 18 PTC TRIP 19 START TIME TRIP 20 RESERVED 21 RTD FAIL TRIP 22 PTC FAIL TRIP 23 RESERVED 24 TRIGGER 25 COMMIDLELOSS TRIP 26 REMOTE TRIP 27 RESERVED 28 RESERVED 29 STOP COMMAND 30 ER TRIGGER 31 TRIP 0 31 1 481 017E R EVENT IA A 0 65535 1...

Page 263: ... Bear Bit 6 PTC Bit 7 Ground Curr Bit 8 VAR Bit 9 Underpower Bit 10 Undervoltage Bit 11 Overvoltage Bit 12 Phase Reversal Bit 13 Power Factor Bit 14 Speed Switch Bit 15 Neutral Curr 0 65535 1 499 0190 R TRIP STATUS HI Bit 0 Start Time Bit 1 Frequency 1 Bit 2 Frequency 2 Bit 3 RTD Other Bit 4 RTD Ambient Bit 5 PTC Error Bit 6 RTD Error Bit 7 Reserved Bit 8 Comm Idle Bit 9 Comm Loss Bit 10 Remote Tr...

Page 264: ...t Bit 1 SALARM Bit 2 Warning Bit 3 6 Reserved Bit 7 Overcurrent Bit 8 15 Reserved 0 65535 1 502 Communications Counters 0193 R NUM MSG RCVD 0 65535 1 503 0194 R NUM OTHER MSG 0 65535 1 504 0195 R INVALID ADDR 0 65535 1 505 0196 R BAD CRC 0 65535 1 506 0197 R UART ERROR 0 65535 1 507 0198 R ILLEGAL FUNCTION 0 65535 1 508 0199 R ILLEGAL REGISTER 0 65535 1 509 019A R ILLEGAL WRITE 0 65535 1 510 019B ...

Page 265: ...RESET COMMAND Bit 0 Trip Reset Bit 1 Set to Defaults Bit 2 Reset Stat Data Bit 3 Reset Hist Data Bit 4 Reset Comm Cntr Bit 5 Reset MOT Data Bit 6 Reserved Bit 7 Reserved 0 255 Relay Elements 2100 R FAST STATUS 0 Bit 0 Faulted OUT 103 Bit 1 Warning Bit 2 IN101 Status Bit 3 IN102 Status Bit 4 IN401 Status Bit 5 IN402 Status Bit 6 IN403 Status Bit 7 Starting Bit 8 OUT101 Status Bit 9 OUT102 Status Bi...

Page 266: ...2106 R AVERAGE CURRENT A 0 65535 1 2107 R IA CURRENT A 0 65535 1 2108 R IB CURRENT A 0 65535 1 2109 R IC CURRENT A 0 65535 1 210A R THERM CAP USED 0 9990 0 1 210B R CURRENT IMBAL 0 1000 0 1 210C R MAX WINDING RTD C 32768 32767 1 210D R IN CURRENT A 0 65535 1 210E R IG CURRENT A 0 65535 1 210F R LATCHED TAR ROW 0 0 255 1 2110 R ROW 1 0 255 1 2111 R ROW 2 0 255 1 2112 R ROW 3 0 255 1 2113 R ROW 4 0 ...

Page 267: ...255 1 2130 R Reserved 0 0 PAR Group Indices 3000 R Reserved 0 0 3001 R GLOBAL SETTINGS 1 3 1 3002 R MAIN SETTINGS 4 12 1 3003 R THERMAL OVERLOAD 13 31 1 3004 R PHASE OVERCURR 32 37 1 3005 R NEUTRAL OVERCURR 38 43 1 3006 R RESIDUAL OVERCURR 44 49 1 3007 R JAM SETTINGS 50 55 1 3008 R UNDERCURRENT SET 56 62 1 3009 R CURRENT IMB SET 63 68 1 300A R PROT DISABLE 69 70 1 300B R START MONITORING 71 71 1 3...

Page 268: ...21 226 1 3022 R CURRENT DATA 227 240 1 3023 R VOLTAGE DATA 241 258 1 3024 R POWER DATA 259 263 1 3025 R RTD DATA 264 280 1 3026 R OVERLOAD STATUS 281 285 1 3027 R MOTOR STATISTICS 286 303 1 3028 R AVG STATISTICS 304 318 1 3029 R PEAK STATISTICS 319 333 1 302A R ALARM COUNTERS 334 350 1 302B R TRIP COUNTERS 351 372 1 302C R HISTORICAL DATA 373 398 1 302D R TRIP WARN DATA 399 402 1 302E R COMMN COUN...

Page 269: ...CODE 0 English 1 French 2 Spanish Mexican 3 Italian 4 German 5 Japanese 6 Portuguese 7 Mandarin Chinese 8 Russian 9 Dutch 400D R FIRMWARE BUILD NUM 16400 16400 400E not used 400F R Product Support Bits Bit 0 2nd IO Card installed Bits 1 15 Reserved 0 1 4010 RW SETTINGS TIMEOUT ms 500 65535 4011 4013 Reserved 4014 R CONFIGURED BIT Bit 0 Unit Configured Bits 1 15 Reserved 0 1 4015 R Reserved 0 0 Tab...

Page 270: ...ttings Error Bit 10 Memory Not Available Bit 11 Settings Prep Error Bit 12 Settings Changes Disabled Bit 13 Memory Diag Error Bit 14 15 Reserved 0 65535 4017 401F R Reserved 0 0 a All addresses in this table refer to the register addresses in the Modbus packet b Registers labeled RW are read write registers Registers labeled W are write only registers Registers labeled R are read only registers c ...

Page 271: ...ovides this direct connectivity include limit switches photoelectric sensors valve manifolds motor starters process sensors bar code readers variable frequency drives panel displays and operator interfaces See the SEL DeviceNet Communications Card User s Guide for information on the installation and use of the DeviceNet card Instruction Manual DeviceNet Card The DeviceNet Communication Card is an ...

Page 272: ...eport the status of the device bus and network communications They are visible from the back panel of the SEL 749M as installed You can do the following with the DeviceNet interface Retrieve metering data such as the following Currents Voltages Power Retrieve motor statistics data Node Address Switch Rotary switch for setting the least significant digit LSD of node address Data Rate Switch Rotary ...

Page 273: ... e g RSNetWorx for DeviceNet or DeviceNet Configurator from OMRON for device parameter monitoring modification or both The interface to the device can also be easily updated without revision of the configuration software tool itself All the registers defined in the Modbus Register Map Table D 23 are available as parameters in a DeviceNet configuration Parameter names data ranges and scaling enumer...

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Page 275: ...dless of the setting method used the thermal element provides motor protection for the following potentially damaging conditions Locked Rotor Starts Running Overload Operation Under Unbalanced Currents Too Frequent or Prolonged Starting In order to provide integrated protection for all these conditions the thermal element Continuously maintains a numeric estimate analogous to the heat energy in th...

Page 276: ...ntinuous heavy load through the service factor specification The purpose of motor thermal protection is to allow the motor to start and run within the manufacturer s published guidelines but trip if the motor heat energy exceeds those ratings because of overloads negative sequence current or locked rotor starting Figure F 1 shows a typical motor thermal limit characteristic plotted with the motor ...

Page 277: ... includes A heat source modeled as a current source A thermal capacitance modeled as a capacitor A thermal impedance to ambient modeled as a resistor A comparator to compare the present heat estimate U to the thermal trip value Figure F 2 Electrical Analog of a Thermal System 0 2 4 6 8 10 1 10 100 Current in Multiples of Full Load Amps Time in Seconds 1000 Overload Running Current Locked Rotor Sta...

Page 278: ... rotor resistance versus slip When motor slip is 1 per unit rotor speed is zero As the motor approaches rated speed slip decreases to near zero Figure F 3 Typical Induction Motor Current Torque and Rotor Resistance versus Slip Use Equation F 2 to calculate the positive sequence rotor resistance plotted in Figure F 3 Equation F 2 The positive sequence rotor resistance is represented as a linear fun...

Page 279: ...heating effect of positive and negative sequence current divide Equation F 3 and Equation F 4 by R0 For the locked rotor case slip S 1 Equation F 5 When the motor is running S 0 the positive sequence heating factor K1 is solved as shown in Equation F 6 Equation F 6 The negative sequence heating factor K2 at S 0 is solved as shown in Equation F 7 Equation F 7 To summarize based on the assumption th...

Page 280: ...t IL the heat estimate U reaches the trip value in exactly locked rotor time To This is true for the motor initially at or below the normal operating temperature and the rating method is used If a less conservative curve method is used the locked rotor trip time will adapt to the actual initial temperature heat estimate at the beginning of the motor start For example the locked rotor trip time wil...

Page 281: ...s the energy level representing the motor rated operating temperature To determine the normal operating energy recall that many motor data sheets publish two locked rotor trip times one longer time referred to as Ta when the motor is started from ambient temperature and one shorter time To when the motor is started from operating temperature Figure F 6 shows a graphical representation of the probl...

Page 282: ... because of the insertion of the resistor into the model The decay of U is exponential as a result of the interaction between the model thermal capacitance and resistance Rather than instantly switching from the high starting trip threshold to the low running trip threshold the relay allows the trip threshold to decay exponentially using the same time constant as the thermal element RC circuit fro...

Page 283: ... downtime A normal motor start is expected to use a significant percentage of the available starting thermal capacity After a motor start it is generally necessary for the motor to cool for a time before another start is permitted The cooling can usually take place while the motor is stopped or running The SEL 749M helps to ensure that a motor start is not attempted while the motor is still too ho...

Page 284: ... Auto Equation F 13 I Motor current in per unit of full load current I0 Preload motor current in per unit of full load current 0 9 SF for stator initially at normal operating temperature hot stator OR O for cold stator and testing thermal element Tp Thermal element trip time in seconds SETMETH Thermal element method setting SF Service factor setting RTC Run state time constant setting in minutes s...

Page 285: ... Equation F 10 Equation F 15 To obtain the trip time hot rotor substitute and in Equation F 10 Equation F 16 Equation F 17 applies to the running element when 2 5 Ι SF and SETMETH Curve To obtain the trip time hot stator substitute and RTC in Equation F 11 Equation F 17 Tp 60 RTC I 2 0 9 SF 2 I 2 SF 2 ln U0 0 TD 1 0 TO 2 08 CURVE IL 6 0 Tp 90 CURVE I 2 U0 R TD 1 0 TO 2 08 CURVE IL 6 0 Tp 75 CURVE ...

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Page 287: ...c Functions and the Sequential Events Recorder SER trigger list settings see Section 9 Analyzing Events Table G 1 SEL 749M Relay Word Bits Sheet 1 of 2 Bit Row Relay Word Bits 7 6 5 4 3 2 1 0 TAR 0 ENABLE TRIP TLED_01 TLED_02 TLED_03 TLED_04 TLED_05 TLED_06 1 49T LOSSTRIP JAMTRIP 46UBT 50P1T RTDT PTCTRIP 50G1T 2 VART 37PT 27P1T 59P1T 47T 55T SPDSTR 50N1T 3 SMTRIP 81D1T 81D2T OTHTRIP AMBTRIP PTCFLT...

Page 288: ...gure 4 13 11 27P1T Phase Undervoltage Trip Definite time delayed see Figure 4 13 2 27P2 Phase Undervoltage Level 2 Alarm Pickup see Figure 4 13 25 27P2T Phase Undervoltage Alarm Warning Definite time delayed see Figure 4 13 6 37LLTC 37LL torque control Bit controlled by Protection Disable Table 4 13 and or Trip Inhibit Table 4 30 settings For internal use only 24 37PA Underpower Alarm Assert when ...

Page 289: ...t Short Circuit Trip Level see Figure 4 3 1 50P2P Definite Time Phase Overcurrent Alarm Pickup see Figure 4 3 11 50P2T Definite Time Phase Overcurrent Short Circuit Warning Level see Figure 4 13 7 50PTC 50P torque control Bit controlled by Protection Disable Table 4 13 and or Trip Inhibit Table 4 30 settings For internal use only 24 50S Motor starting overcurrent element Pickup 2 5 Full Load Curre...

Page 290: ...ase B For internal use only see Overcurrent Elements on page 4 10 27 DI_C Distortion index phase C For internal use only see Overcurrent Elements on page 4 10 27 DNAUX1 DeviceNet Modbus AUX1 assert bit 26 DNAUX2 DeviceNet Modbus AUX2 assert bit 26 DNAUX3 DeviceNet Modbus AUX3 assert bit 26 DNAUX4 DeviceNet Modbus AUX4 assert bit 26 DNAUX5 DeviceNet Modbus AUX5 assert bit 26 DNAUX6 DeviceNet Modbus...

Page 291: ...OSLO Motor Lockout Conditions Starts per hour function NOSLO 12 OTHALRM Other Temperature Alarm Asserts when any healthy Other RTD temperature exceeds the alarm warning set point for that temperature 6 OTHTRIP Other Temperature Trip Asserts when one or more healthy Other RTD temperature exceeds the trip set points 3 OUT101 Control equation for contact outputs Slot A 10 OUT102 Control equation for ...

Page 292: ... Reset Latch Bit 08 see Table 4 35 22 RSTTRGT Asserts when the SELOGIC control equation RSTTRGT result is logical 1 Used to reset trip logic and target LEDs see Table 4 36 25 RTD10A RTD10 Alarm 16 RTD10T RTD10 Trip 16 RTD11A RTD11 Alarm 16 RTD11T RTD11 Trip 16 RTD12A RTD12 Alarm 16 RTD12T RTD12 Trip 16 RTD1A RTD1 Alarm 14 RTD1T RTD1 Trip 14 RTD2A RTD2 Alarm 14 RTD2T RTD2 Trip 14 RTD3A RTD3 Alarm 1...

Page 293: ... detect a speed switch contact closure within a settable trip period from the beginning of a motor start see Figure 4 11 2 SPEED2 Asserts when the SELOGIC control equation SPEED2 result is logical 1 see Table 4 32 13 SPEEDSW Speed Switch Input Asserts when the SELOGIC control equation SPEEDSW result is logical 1 see Table 4 32 13 STAR Asserts when the Star Delta Starting function issues a command ...

Page 294: ...e between starts lockout 12 THERBL Asserts for a specified time when protected motor starts Indicates inhibit of thermal protection see Table 4 13 13 THERMLO Motor Lockout Conditions Lockout asserted by the thermal element THERMLO 12 TLED_01 Front Panel T01_LED 0 TLED_02 Front Panel T02_LED 0 TLED_03 Front Panel T03_LED 0 TLED_04 Front Panel T04_LED 0 TLED_05 Front Panel T05_LED 0 TLED_06 Front Pa...

Page 295: ...y Element These numbers are frequently used within a suffix letter to further designate application The suffix letters used in this instruction manual include P Phase Element G Residual Ground Element N Neutral Ground Element Q Negative Sequence 3I2 Element Antibackspin Protection Relay function that prevents the motor from being started for a short time after it is stopped Used on pump motors to ...

Page 296: ...n was received without data corruption CT Abbreviation for current transformer Current Unbalance Element Protection element that calculates the magnitudes of the measured phase cur rents calculates the average of those magnitudes determines the magnitude with the largest deviation from average It then calculates the difference between the magnitude average and magnitude of the phase with the large...

Page 297: ...l relay operation and de energized when relay power is removed or if the relay fails Fast Meter Fast Operate Binary serial port commands that the relay recognizes at the relay front and rear panel EIA 232 serial ports These commands and the responses from the relay make relay data collection by a communications processor faster and more efficient than transfer of the same data through use of forma...

Page 298: ...tor Thermal Element provides motor protection for the following condi tions that cause motor overheating locked rotor overload operation and cur rent unbalance NEMA Abbreviation for National Electrical Manufacturers Association Neutral Overcurrent Element A protection element that causes the relay to trip when the neutral current magnitude measured by the IN input exceeds a user settable value Use...

Page 299: ...sented by a unique identifier known as a Relay Word bit Relay Word Bit A single relay element or logic result that the relay updates once each process ing interval A Relay Word bit can be equal to either logical 1 or logical 0 Logical 1 represents a true logic condition picked up element or asserted contact input or contact output Logical 0 represents a false logic condition dropped out element or...

Page 300: ...rting Terminal Emulation Software Personal computer PC software that can be used to send and receive ASCII text messages via the PC serial port Underfrequency Element A protection element that causes the relay to trip when the measured electrical system frequency is less than a settable frequency Underpower Element A protection element that causes the relay to trip when the measured electrical pow...

Page 301: ...ART REPORT MSR 7 19 MOTOR START TREND MST 7 19 PASSWORD 7 19 QUIT 7 20 R_S 7 21 SER 7 21 SET 7 22 SHOW 7 23 SNS 7 24 START STR 7 26 STATUS 7 24 STOP 7 26 SUMMARY 7 26 TARGET 7 27 TIME 7 28 TRIGGER 7 28 9 3 Commissioning Procedure 10 3 10 6 clear data buffers 10 6 connection check 10 6 required equipment 10 3 Communication access levels 7 7 7 10 ASCII commands 7 11 7 28 automatic messages 7 7 comma...

Page 302: ... 3 trigger settings 4 44 unfiltered 9 7 Event Summary 9 3 9 5 See also Event contents 9 3 event type 9 4 SUMMARY command 7 26 F F_TRIG Operator 4 50 Factory Default contact outputs 2 14 LEDs 8 9 passwords 7 20 serial port settings 4 41 tripping logic 4 34 Fail Safe 2 13 4 39 See also Contact Outputs auxiliary outputs 4 39 TRIP output 4 39 Fast Binary Messages C 2 See also Fast Operate Fast Meter F...

Page 303: ... reactive power 5 2 5 4 real power 5 2 5 4 RTD 5 3 RTD thermal capacity 5 2 RTD temperatures 5 2 starts available 5 2 temperature 5 2 5 3 thermal 5 2 thermal capacity used 5 2 time to reset 5 2 5 3 time to trip 5 2 voltage 5 2 5 3 METER Command 7 17 METER T Command 7 18 Modbus D 1 D 36 03h read holding registers D 3 04h input holding registers D 3 06h preset single register D 4 10h preset multiple...

Page 304: ...inary Protocol C 2 SEL Communications Processor 7 2 C 3 C 10 SEL 2600A RTD Module 1 2 failure messages 5 3 fiber optic connection 2 12 RTD based protection 4 21 4 23 SEL 749M Relay features 1 1 options 1 3 Self Tests 10 11 See also Status Relay self test table 10 11 SELOGIC Control Equations AND operator 4 50 contact output 4 39 contactor circuit breaker auxiliary 4 36 event trigger 9 3 F_TRIG ope...

Page 305: ...ont panel reset 8 8 locked rotor trip time dial 4 6 application example 4 7 lockout 4 35 negative sequence F 4 positive sequence F 4 purpose F 2 rating method application example 4 5 RTD biasing 4 10 4 23 running protection 4 5 F 7 selecting thermal method 4 4 starting protection 4 5 theory F 1 F 9 Thermistor See PTC Thermistor Time Between Starts 4 17 lockout 4 18 meter time to reset 5 2 5 3 Time...

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Page 307: ...y compressed history report CST Display compressed status report CSU Display compressed event summary DAT View the date DAT dd mm yyyy Enter date in DMY format if DATE_F setting is DMY DAT mm dd yyyy Enter date in MDY format if DATE_F setting is MDY DAT yyyy mm dd Enter date in YMD format if DATE_F setting is YMD EVE n Show event report n with 4 samples per cycle If n is omitted most recent report...

Page 308: ...w serial port settings where n specifies the port 3 4 or F n defaults to the active port if not listed SHO R Show report event and SER settings SHO L Show general logic settings STA Display relay self test status STA S Display SELOGIC usage status report SUM View event summary reports SUM R or C Reset event summary buffer TAR Display Relay Word Row 0 front panel target LEDs TAR n k Display Relay W...

Page 309: ...nds jump ahead to a specific setting by entering the setting name e g 50P1P SET P n Enter change serial Port n settings n 3 4 or F if not specified the default is the active port SET R Enter change report event and SER settings SET TERSE For all SET commands TERSE disables the automatic SHO command after settings entry STA R or C Clear self test status and restart relay STO Stop motor STR Start mo...

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Page 311: ...y compressed history report CST Display compressed status report CSU Display compressed event summary DAT View the date DAT dd mm yyyy Enter date in DMY format if DATE_F setting is DMY DAT mm dd yyyy Enter date in MDY format if DATE_F setting is MDY DAT yyyy mm dd Enter date in YMD format if DATE_F setting is YMD EVE n Show event report n with 4 samples per cycle If n is omitted most recent report...

Page 312: ...w serial port settings where n specifies the port 3 4 or F n defaults to the active port if not listed SHO R Show report event and SER settings SHO L Show general logic settings STA Display relay self test status STA S Display SELOGIC usage status report SUM View event summary reports SUM R or C Reset event summary buffer TAR Display Relay Word Row 0 front panel target LEDs TAR n k Display Relay W...

Page 313: ...nds jump ahead to a specific setting by entering the setting name e g 50P1P SET P n Enter change serial Port n settings n 3 4 or F if not specified the default is the active port SET R Enter change report event and SER settings SET TERSE For all SET commands TERSE disables the automatic SHO command after settings entry STA R or C Clear self test status and restart relay STO Stop motor STR Start mo...

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