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GE MIFII GEK-106237P, Instruction Manual, Page: 170 / 245

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GE MIFII GEK-106237P Instruction Manual Download Page 170

GEK-106237P

MIFII  Digital Feeder Relay 

11-3

11 MII FAMILY FAQ (FREQUENTLY ASKED QUESTIONS)

11.1 MIFII FAQ

11

Q12   My MIFII unit has tripped clearing a system fault, and I would like to analyze oscillography, should I use
special software?  

A12   EnerVista MII SETUP software allows saving oscillography in a COMTRADE format file (IEEE C37.111 / IEC 60255-
24: Common format for transient data exchange for power systems). As the COMTRADE format chosen is ASCII, these
files can be viewed in any application accepting ASCII format ("Microsoft Excel“), as well as specific applications for
viewing oscillography records, as GE Multilin’s GE OSC software.

Q13   My MIFII unit has the display off but the Ready LED is ON; does that mean the relay needs to be repaired? 

A13   No, it doesn’t. MII relays automatically turn off the display if in 15 minutes no key has been pressed. By pressing any
key the display turns on again.

Q14   I want to pint/view all the relay settings in one window, how can I do it? 

A14   In ENERVISTA MII Setup it is possible to see all the settings in a single window. After the communication with the
relay, from the FILE menu of the program you can PRINT or PREVIEW the settings.

Q15

   

Do harmonics influence the MIFII measure?

A15  No, they don’t. MIFII uses a complete cycle recursive DFT (Discrete Fourier Transformation) in order to obtain the
resulting measure phasor. The Fourier transformation consists of decomposing a signal into a series of sinusoidal signals
with frequencies that are multiples of the fundamental frequency. Once these signals have been obtained, harmonics are
extracted to get the phasor value corresponding to the fundamental frequency; therefore, it acts as a digital harmonic filter
and all the relay protection elements work only with the fundamental component of each signal.

Summary of Contents for MIFII GEK-106237P

Page 1: ...mail gemultilin ge com Internet www GEDigitalEnergy com Copyright 2009 GE Multilin MIFII Digital Feeder Protection with Recloser Instruction manual GEK 106237P GE Multilin Avda Pinoa 10 48170 Zamudio SPAIN Tel 34 94 485 88 00 Fax 34 94 485 88 45 E mail gemultilin euro ge com g GE Digital Energy ...

Page 2: ...5 THERMAL IMAGE ELEMENT 49 2 6 RECLOSER ELEMENT 2 6 1 INTRODUCTION 2 8 2 6 2 RECLOSER STATUSES 2 8 2 6 3 RECLOSER SETTINGS 2 12 2 7 COLD LOAD PICKUP AVAILABLE ONLY IN OPTION 2 MODELS 2 8 BREAKER FAILURE TO OPEN AVAILABLE ONLY IN OPTION 2 MODELS 2 9 I2 COUNTER AVAILABLE ONLY IN OPTION 2 MODELS 2 10 EVENTS AVAILABLE IN OPTION 1 AND OPTION 2 MODELS 2 11 OSCILLOGRAPHY AVAILABLE IN OPTION 1 AND OPTION ...

Page 3: ...FILE 4 2 1 NEW 4 3 4 2 2 OPEN 4 3 4 2 3 SETTINGS FILE CONVERTER 4 4 4 2 4 PROPERTIES 4 4 4 2 5 GET INFO FROM RELAY 4 5 4 2 6 SEND INFO TO RELAY 4 5 4 2 7 PRINT SETUP 4 5 4 2 8 PRINT PREVIEW 4 5 4 2 9 PRINT 4 6 4 2 10 CLOSE 4 6 4 3 SETPOINT 4 3 1 SETTINGS 4 7 4 3 2 MAIN SETTINGS 4 8 4 3 3 ADVANCED SETTINGS 4 8 4 3 4 RELAY CONFIGURATION 4 9 4 3 5 LOGIC CONFIGURATION 4 11 4 3 6 DATE TIME 4 12 4 4 ACT...

Page 4: ... AND 2 6 1 1 DESCRIPTION OF INPUTS 6 1 6 1 2 INPUT ELEMENTS 6 4 6 2 OUTPUTS AND LEDS CONFIGURATION FOR OPTIONS 1 AND 2 6 2 1 DESCRIPTION OF OUTPUTS AND LEDS 6 5 6 2 2 OUTPUT AND LED ELEMENTS 6 7 7 LOGIC CONFIGURATION ONLY OPTION 2 MODELS 7 1 LOGIC DESCRIPTION 7 2 LOGIC ELEMENTS 8 KEYPAD AND DISPLAY 8 1 DESCRIPTION 8 2 FACEPLATE KEYPAD 8 3 ALPHANUMERIC DISPLAY AND LEDS 8 3 1 DISPLAY 8 3 8 3 2 LEDS ...

Page 5: ...5 9 IAC EXTREMELY INVERSE CURVE 9 17 9 15 10 IAC INVERSE LONG CURVE 9 17 9 15 11 IAC INVERSE SHORT CURVE 9 17 9 15 12 DEFINITE TIME 9 18 9 16 GROUND TOC ELEMENT 51G 9 16 1 IEC INVERSE CURVE 9 19 9 16 2 IEC VERY INVERSE CURVE 9 19 9 16 3 IEC EXTREMELY INVERSE CURVE 9 20 9 16 4 ANSI INVERSE CURVE 9 20 9 16 5 ANSI VERY INVERSE CURVE 9 21 9 16 6 ANSI EXTREMELY INVERSE CURVE 9 21 9 16 7 IAC INVERSE CUR...

Page 6: ...13 TROUBLESHOOTING GUIDE 13 1 MIFII TROUBLESHOOTING GUIDE A THERMAL IMAGE UNIT A 1 INTRODUCTION A 2 OPERATING PRINCIPLE A 3 ALGORITHMS A 4 DIGITAL TECHNOLOGY AND THERMAL IMAGE RELAYS A 5 THERMAL CURVE A 6 MIFII THERMAL CURVES B TIME CURRENT CURVES FOR 51P AND 51N UNITS B 1 IEC BS142 CURVES B 2 ANSI CURVES B 3 IAC CURVES C MODBUS C 1 MODBUS FORMAT C 2 READING VALUES C 3 COMMAND EXECUTION C 4 SYNCHR...

Page 7: ...SETTINGS AND CONFIGURATION D 3 E OPTION C MODELS E 1 INTRODUCTION E 2 COMUNICATION PORTS E 3 IEC 60870 5 103 E 3 1 PHYSICAL LAYER E 4 E 3 2 LINK LAYER E 5 E 3 3 APPLICATION LAYER E 7 F TIMING ACCURACY FOR 51 ELEMENT F 1 INTRODUCTION F 2 TIME OVERCURRENT ELEMENTS F 3 ANALYSIS OF A PRACTICAL CASE F 4 INTERNATIONAL STANDARD F 5 CONCLUSIONS ...

Page 8: ... BY THE EQUIPMENT MAY BE IMPAIRED INSTALLATION MUST BE ACCORDING TO THE NATIONAL ELECTRIC CODE OF THE APPROPRIATE COUNTRY IMPORTANT WARNING For upgrading the relay firmware to version 4 00 or later it is mandatory that the EnerVista MII Setup version is 1 10 or higher For firmware version 5 00 or later the EnerVista MII Setup version must be 2 10 or later Otherwise it may result in damage to the r...

Page 9: ... damage Check the label at the side of the relay and check that the relay model is the same model ordered Figure 1 1 RELAY IDENTIFICATION LABEL A4454P3 Ensure that the mounting screws have been included with the relay For product information instruction manual updates and the latest software updates please visit the GE Multilin Home Page www GEdigitalenergy com multilin ...

Page 10: ...ro ge com AMERICA ASIA AND AUSTRALIA GE MULTILIN 215 Anderson Avenue L6E 1B3 Markham ON CANADA Tel 1 905 294 6222 Fax 1 905 201 2098 E mail multilin tech ge com The information provided herein does not intend to cover all details of variations of the equipment nor does it take into account the circumstances that may be present in your installation operating or maintenance activities Should you wis...

Page 11: ...to communicate with the relay using a computer through the front serial port please ensure that the computer is grounded to the same ground as the relay In case of using a portable computer it is recommended to have it disconnected to its power supply as in many cases they are not correctly grounded either due to the power supply itself or to the connector cables used Powering the portable PC with...

Page 12: ...ton and follow the installation instructions to install the no charge ENERVISTA software 3 When installation is complete start the ENERVISTA Launchpad application 4 Click the IED Setup section of the Launch Pad window Figure 1 3 ENERVISTA LAUNCH PAD WINDOW 5 In the ENERVISTA Launch Pad window click the Add Product button and select the relay from the Install Software window as shown below Select t...

Page 13: ...hoose from the list the software program related to the specific model and click the Download Now button to obtain the installation program 7 When ENERVISTA detects that there is already a version of the program in the Software Library you can choose whether to install it directly or to check for more versions Figure 1 5 CHECK FOR UPDATED VERSIONS ...

Page 14: ...am from the Web If the version you already have is the last one on the Web the following screen will appear 10 If there were more versions on the Web ENERVISTA will then show the user the different setup programs available for upgrade with their version size and release date 11 Double click the installation program once its download is complete to install the EnerVista MII SETUP software 12 Select...

Page 15: ...ext to continue with the installation procedure Figure 1 6 WELCOME TO INSTALLATION WINDOW 15 When the Choose Destination Location window appears and if the software is not to be located in the default directory click Change and type in the complete path name including the new directory name and click Next to continue with the installation procedure Figure 1 7 CHOOSE DESTINATION LOCATION WINDOW 16 ...

Page 16: ...I Digital Feeder Relay 1 9 1 GETTING STARTED 1 2 ENERVISTA MII SETUP SOFTWARE 1 Figure 1 8 PROGRAM FOLDER 17 To finish with the installation process select the desired language for startup Figure 1 9 LANGUAGE SELECTION ...

Page 17: ...eder Relay GEK 106237P 1 2 ENERVISTA MII SETUP SOFTWARE 1 GETTING STARTED 1 18 Click Finish to end the installation The MII device will be added to the list of installed IEDs in the ENERVISTA Launchpad window as shown below ...

Page 18: ... required GE Multilin offers F485 DAC300 and RS232 485 converters This converter box is connected to the computer using a straight through serial cable A shielded twisted pair 20 22 or 24 AWG 0 25 0 34 or 0 5 mm2 cable is used to connect the converter box to the relay rear communication terminals The converter box GND terminals are connected to the relay SDA SDB GND terminals respectively For long...

Page 19: ...alue for each phase Ia Ib Ic Ig Pressing the Menu button accesses the second level To access information within the same hierarchical level horizontal movement push the up down arrow buttons To access the third level push the Enter button when the desired heading is shown in the display To return back to the previous level from the third to the second level or from the second to the first one push...

Page 20: ...y in Option 2 models I2 Counter available only in Option 2 models CONTROL 2 Setting groups Open close breaker operations METERING Phase and ground currents Thermal image INPUTS OUTPUTS 4 Current inputs 3 phases 1 ground Programmable digital inputs and outputs available only in Option 1 and Option 2 models COMMUNICATIONS Front RS232 port Rear RS485 port USER INTERFACE 2x16 LCD Display 6 LEDs 4 prog...

Page 21: ... actual values and for retrieving stored information list of events oscillography etc All serial ports of the standard model use the Modbus RTU protocol and may be connected to system computers with baud rates from 300 600 1200 4800 9600 and 19200 bps The rear RS485 port can be converted into an RS232 port or into a fiber optic plastic or glass serial port by using GE Multilin DAC300 F485 or RS232...

Page 22: ...access is local by the RS232 port the back port is disabled and the relay will not serve any petition or command sent by the rear port When the access is local by keypad the back port is not disabled and actual values can be read but setting changes and operations will not be allowed by the back port Setting changes either by keypad and display or by communications are password protected the user ...

Page 23: ...elements In order to avoid undesired trips time overcurrent elements will not pickup till a value of 1 05 Set value Due to design criteria actual pickup level has been INTENTIONALLY set to 5 over the set value to ensure that even in the worst case scenario the relay will NEVER TRIP under the intended setting This meets IEC international standards 2 4 1 1 IEC CURVES The general formula for IEC BS14...

Page 24: ...P Q B K Constants defined in the standard as follows Settings available for the phase time overcurrent unit allows the user to enable disable the unit set the pickup value between 0 1 2 4 times the rated current in case of 1 5 A ground or 0 005 0 12 A in case of sensitive ground and set the current time operating characteristic type and time dial Note The relay will use either IEC IAC or ANSI curv...

Page 25: ...e Ground Time Overcurrent element offers the same setting possibilities as the Phase Time Overcurrent element The ground current can be obtained from a residual connection on the CTs For a more sensitive ground current detection a window type zero sequence CT taking the three phases inside its windows can be used Refer to figure 3 6 for more details 2 4 4 GROUND INSTANTANEOUS OVERCURRENT ELEMENTS ...

Page 26: ...s unit provides protection against overheating due to overloading conditions The operating time curve is set from the time curve family as a function of the time constant T1 settable between 3 and 600 minutes The cooling time constant T2 can be set between 1 and 6 times the heating time constant T1 Refer to Appendix A for a detailed explanation on the operating principles of this element ...

Page 27: ...the first protection trip to be for instantaneous overcurrent and the next trip to be timed over current in order to allow a time for output fuses to burn of a feeder branch For this purpose it is necessary to disable the IOC element after the first shot The reclose initiation can be started by a trip or from the physical input AR INITIATE There are settings for selecting which protection function...

Page 28: ...GEK 106237P MIFII Digital Feeder Relay 2 9 2 PRODUCT DESCRIPTION 2 6 RECLOSER ELEMENT 2 Figure 2 3 AUTORECLOSER DETAILED STATUS DIAGRAM ...

Page 29: ... TO DELAY CHECK BLOCK READY FOR FIRST RECLOSE WAIT FOR 52 OPEN INITIATE DEAD TIME n ISSUE CLOSE BREAKER OPERATION INCREASE n WAIT FOR 52 CLOSE INITIATE RST TIME BLOCK LAST RECLOSE INCOM SEQ TIME BLOCK RI 52CLOSE RI LAST SHOT INCOM SEQ TIME BLOCK RI LAST SHOT LOCKOUT DEAD TIME n 52 CLOSE T RESET LOCKOUT BLOCK RI OPEN T RESET RI LAST SHOT RI LAST SHOT ...

Page 30: ...will continue through its sequence until one of the following conditions is satisfied The close signal is issued when the AR DEAD TIME timer times out The scheme goes to lockout While RIP is active the scheme checks that the breaker is open and the shot number is below the limit and the being measuring the AR DEAD TIME Each of the four possible shots has an independently settable dead time AR DEAD...

Page 31: ...mand in order for the autorecloser to reset from LOCKOUT AR INCOM SEQ TIME this timer is used to set the maximum time interval allowed for a single reclose shot It is started whenever a reclosure is initiated and is active when the scheme is in the RECLOSE IN PROGRESS state If all conditions allowing a breaker closure are not satisfied when this time expires the scheme goes to LOCKOUT AR RST TIME ...

Page 32: ...ied by a constant K50P and the phase TOC 51P tap settings are multiplied by a constant K51P A status signal turns on indicating that the Cold Load Pickup is enabled and the corresponding event is generated For exiting the CLP status when the current values of the three phases are above 8 In a T OUT timer is started If the current values fall below 8 In before the timer countdown has finished the u...

Page 33: ... not disabled the FAILURE TO OPEN status signal is activated and the corresponding event is generated The Breaker Failure to Open signal is reset when the breaker is open and there is no current once the breaker has been opened it gets closed again If a breaker status input is not enabled After a trip the unit checks whether the highest current value is over 8 of the rated current In this case a t...

Page 34: ... the counter reaches or exceeds a limit value setting an I2 ALARM signal will be produced in the unit status and the corresponding event will be generated There is also a Breaker Opening counter available for informational purposes only The I2 counter and the number of openings counter are stored in capacitor backed up RAM memory The setting associated to the I2 COUNTER is the limit value of the c...

Page 35: ...ister contains the event description date and time 4ms accuracy the current values in phases and ground at that moment and a summary of the status signals tha can produce events and whether they were active or not in that moment Table 2 1 LIST OF EVENTS DESCRIPTION OPTION 1 OPTION 2 50P1 Pickup Drop out Yes 50P2 Pickup Drop out Yes 50G1 Pickup Drop out Yes 50G2 Pickup Drop out Yes 51P Pickup Drop ...

Page 36: ...1 OPTION 2 Close Breaker Yes Yes 52B open closed No Yes 52A open closed No Yes 52 open closed No Yes Group 2 selection by digital input Yes Yes Oscillography triggered by digital input Yes Yes Oscillography triggered by command Yes Yes Breaker failure No Yes I2 Alarm No Yes Settings change Yes Yes EEPROM failure Yes Yes User settings Factory settings Yes Yes Table 2 1 LIST OF EVENTS ...

Page 37: ...mber of oscillo Value of the differential Ia Ib Ic and Ig currents at the moment of the oscillography trigger Active group at the moment of the oscillography trigger Element settings when retrieving the oscillography record Oscillography and event mask File to emulate the relay model in PC program with the relay settings and memory map The number of oscillo is a circular counter that increases wit...

Page 38: ...from where the above mentioned causes can be masked They are detailed in the SETPOINT SETPOINT ADVANCED SETTINGS OSCILOGRAPHY MASK section MIFII relay with option C stores 4 oscillography records with a resolution of 16 samples per cycle with a total length of 150 cycles including prefault cycles each register In General Settings there is a setting for prefault cycles It is adjustable from 10 to 1...

Page 39: ...e Users can select which setting group is active using a setting sending a command to the relay from the communications program or by a digital input in OPTION 1 and OPTION 2 models Settings are divided in two different categories Main Settings and Advanced Settings This makes setting the relay extremely simple for those users who want to use just the Main functions of the MIFII relay Users who re...

Page 40: ...rents Accuracy is 1 of injected current at rated current and 3 of injected current 0 1 full scale in the complete range 2 13 2 SELF TEST Self monitoring tests are carried out both when the unit is started up and during normal operation Any internal problem detected by the self monitoring function will issue an alarm and the READY output contact will be released indicating an out of service conditi...

Page 41: ...dy and at least one of the protection functions is enabled If the LED is off with the above mentioned conditions this indicates a loss of auxiliary supply voltage or an internal HW SW critical failure condition TRIP The relay has issued a trip activating the corresponding tripping output contact PHASE Indicates that the trip has been issued by one of the Phase Overcurrent Elements 51P 50P1 50P2 GR...

Page 42: ...port provide interface with the relay All serial ports of the standard model use the Modbus RTU protocol and may be connected to system computers with baud rates from 300 to 19200 bps Up to 32 MIFII relays can be connected daisy chained on the same communication circuit Each relay must be assigned a different Modbus Address using a setting if multiple relays are connected on the same circuit A spe...

Page 43: ...se CT In 1A 0 1 2 4 A 5 Phase CT In 5A 0 5 12 A Ground range 0 Ground CT In 1 5 A 0 1 2 4 In 1 Ground CT In 1A 0 1 2 4 A 5 Ground CT In 5A 0 5 12 A N Sensitive ground In 1 A 0 005 0 12 A L Very sensitive ground In 1 A 0 002 0 048 A Language E English language F French language T Turkish language Options 0 Basic model no options 1 Option 11 1 OPTION 1 Configurable I O event recording oscillography ...

Page 44: ...f 0 1 for ANSI curves 0 5 to 10 in steps of 0 1 for IAC curves Reset Type Instantaneous Timing Accuracy 5 50 ms of set time for 2 I 20 times the Actual Pickup Level for IEC ANSI definite time curves For I 2 times the Actual Pickup refer to APPENDIX F TIMING ACCURACY FOR 51 ELEMENT 6 of set time for 2 I 20 times the Actual Pickup for IAC curves Type measure time DFT of 1 cycle 2 16 1 2 PHASE GROUND...

Page 45: ... 1 to 6 times τ1 in steps of 1 From 70 to 100 Ipickup in steps of 1 5 for operate times greater than 2 sec 2 16 2 1 FUNDAMENTAL CURRENT Accuracy 1 at rated current 3 of injected current 0 1 full scale in the whole range 2 16 3 1 AC CURRENT Secondary Rated Current Frequency Relay CT Burden Current Withstand 1m 5 A depending on the selected model or 50 mA for sensitive ground models 50 60 Hz 3 Hz Th...

Page 46: ...age 110 to 250 Vdc 88 300 Vdc 110 to 230 Vac 50 60 Hz 88 264 Vac 50 60 Hz Power Consumption Max 10 W Proper backup time date time and log memory without power supply voltage 1 week 2 16 5 1 OUTPUT RELAYS Configuration 6 Electro Mechanical Form C Contact Material Silver alloy suited for inductive loads Maximum Operating Voltage 400 Vac Single Contact Carry Continuous 10 A at 250 Vac general purpose...

Page 47: ...5 Vdc 10 A 48 A 0 6 A 75 W 250 Vdc 10 A 48 A 0 5 A 125 W AC Resistive 120 Vac 10 A 48 A 10 A 1920 VA 250 Vac 10 A 48 A 10 A 4000 VA AC Inductive PF 0 4 250 Vac 10 A 30 A 10 A 1000 VA FRONT PORT RS232 300 600 1200 2400 4800 9600 or 19200 bps Modbus RTU REAR PORT RS485 300 600 1200 2400 4800 9600 or 19200 bps Modbus RTU 9600 or 19200 IEC60870 5 103 Operating Temperatures 20º C to 60º C Ambient Stora...

Page 48: ...and 1 kV in differential mode in the I O terminals specified in paragraph 4 2 of the corresponding report IEC 61000 4 8 1993 IEC 61000 4 8 1993 50 Hz Magnetic Fields Immunity Test Level 5 100 A m for continuous applications and 1000 A m for transient applications with a performance criteria A IEC 60255 5 1977 Measurement of Insulation Resistance In the paragraph relating to insulation resistance f...

Page 49: ...ESTS IEC 60068 2 1 1990 A1 1992 A2 1994 Test Ad Cold IEC 60068 2 2 1974 A1 1993 A2 1994 Test Bd Dry Heat MAKE AND CARRY ANSI C37 90 1990 Make and Carry VIBRATION SHOCK AND BUMPS IEC 60255 21 1 1998 Sinusoidal vibration Vibration endurance Test Class I IEC 60255 21 2 1998 Shock response Shock strength Bumps Test Class I VIBRATION EN 60255 21 3 1996 Seismic Test Insulation Test IEC255 5 Tested on CT...

Page 50: ...ive material which guarantees the unit s immunity to all types of EMI RFI ESD interference As well an IP52 IEC 529 protection degree against dust and water through the front and with the relay mounted in the panel The modular design of the relay simplifies repair or replacement of its components without the need to manipulate the wiring These types of operations must be performed exclusively by qu...

Page 51: ... panel with the 4 M6 screws provided with the unit This allows the user access to the front keypad display and communication port The wiring is at the rear of the unit The drilling dimensions are shown on the drilling dimension diagram Note Dimensions are shown in inches mm Figure 3 2 MOUNTING AND DIMENSIONS DRAWING FOR MIFII MODELS WITH DEPTH REDUCING COLLAR ...

Page 52: ...he case that incorporates shorting bars in the current inputs so that it can be extracted without the need to short circuit the current externally A grounded antistatic wristband must be used when manipulating the module in order to avoid electrostatic discharges that may cause damage to the electronic components In a similar way when mounting and dismounting the front of the unit be sure to corre...

Page 53: ... Relay GEK 106237P 3 1 DESCRIPTION 3 HARDWARE 3 3 1 4 TYPICAL WIRING DIAGRAM Recommended cable section 12 16 AWG Copper conductor only Tightening torque 1 2 Nm Figure 3 4 TYPICAL WIRING DIAGRAM FOR MIFII RELAY WITHOUT RECLOSER ...

Page 54: ...GEK 106237P MIFII Digital Feeder Relay 3 5 3 HARDWARE 3 1 DESCRIPTION 3 Figure 3 5 TYPICAL WIRING DIAGRAM FOR MIFII RELAY WITH RECLOSER ...

Page 55: ... CONTROL POWER CAUTION CONTROL POWER SUPPLIED TO THE RELAY MUST MATCH THE RATED VOLTAGE OF THE RELAY IF THE VOLTAGE IS APPLIED TO THE WRONG TERMINALS DAMAGE MAY OCCUR RANGE RATED VOLTAGE OPERATION RANGE LO 24 48 Vdc 19 2 57 6 Vdc HI 110 250 Vdc 110 230 Vac 88 300 Vdc 88 264 Vac ...

Page 56: ...ound connections on the current inputs Current transformers with 1 A or 5 A rated secondary current may be used CAUTION VERIFY THAT YOUR RELAY MODEL CORRESPONDS TO YOUR RATED SECONDARY CURRENT UNMATCHED CTS MAY RESULT IN EQUIPMENT DAMAGE OR INADEQUATE PROTECTION The exact placement of a zero sequence CT so that ground fault current will be detected is shown below Twisted pair cabling on the zero s...

Page 57: ...d contact input depends on the relay model For low voltage range relays LO model the threshold is set to 12 Vdc For high voltage range relays HI model the voltage threshold is 75 Vdc In case of using AC voltage it must be ensured that there is no voltage less than 10 Vac between the input common terminal A10 and the ground terminal The AC system must be line neutral type and not line line ensuring...

Page 58: ...nected to the MIFII output terminal For each output relay it is possible to select which state is preferred to have at the MIFII terminals NC normally closed or NO normally open Next figure shows the PCB of a MIFII relay and the location of the jumpers used to select the configuration of each output contact NO or NC Figure 3 9 PCB SCHEME SHOWING THE JUMPERS TO CONFIGURE THE OUTPUT CONTACTS NC NO ...

Page 59: ... the number of outputs is reduced to three Jx jumper is closed in the factory default configuration It is possible to order relays with Jx removed The figure shows the factory default configuration with Jx Jumper closed It is located on the soldering part of the PCB containing the inputs and outputs Figure 3 10 JX JUMPER The Jx jumper is a tin solder jumper easy to remove using a de soldering tool...

Page 60: ...ne output contact combining OUT1 and OUT2 Group 2 Terminals B9 A7 OUT3 Standard output contact Terminals B10 A7 OUT4 Standard output contact 3 1 9 1 OUTPUT CONFIGURATION AT TERMINALS B8 B7 To have a closed contact across terminals B7 B8 one of the two following procedures should be followed a JX REMOVED AND OUT1 AND OUT2 NORMALLY OPEN OUT1 and OUT2 must operate together to operate like a single ou...

Page 61: ...s hardware configuration it is necessary to configure by software the OUT1 as NOT ASSIGNED so it never change its state and remains closed and OUT2 as required by the application output configuration is only available in models option 1 and 2 d OUT1 NORMALLY OPEN AND OUT2 NORMALLY CLOSED The hardware configuration corresponds to OUT1 NO and OUT2 NC To operate with this hardware configuration it is...

Page 62: ...s interface is a personal computer running the EnerVista MII SETUP software Next figure shows the communications cable configuration Figure 3 12 RS232 FRONT PORT CONNECTION WARNING IN ORDER TO PREVENT DAMAGE BOTH TO THE PC SERIAL COMMUNICATIONS PORT AND THE RELAY FRONT RS232 PORT IT IS COMPULSORY TO CONNECT THE RELAY GROUND TO THE SAME GROUND AS THE PC OTHERWISE USE AN UNGROUNDED COMPUTER FOR THIS...

Page 63: ... rule terminals A should be connected to terminals and terminals B to There are exceptions to this rule such as the GE ALPS and DDS family of relays The GND terminal should be connected to the common wire inside the shield when provided Otherwise it should be connected to the shield To avoid loop currents the shield should be grounded at one point only Each relay should also be daisy chained to th...

Page 64: ...working with setting files 1 In off line mode disconnected from the relay creating or editing setting files for a future download to the relay 2 Modifying directly the relay settings while connected to the relay b Configuration The configuration of inputs outputs and LEDs can be modified and internal logics with the different relay elements can be created For MIFII it depends on the selected optio...

Page 65: ...rwise communication may not be possible or the relay and or the computer could be damaged To work online the relay communication parameters e g baud rate relay address and password must match the parameters in the computer The computer parameters can be modified in the Communication Computer menu Refer to the appropriate section in this same chapter for more details 4 1 3 MAIN SCREEN The main scre...

Page 66: ...re related to the default factory settings of the relay The Model Selection window will show only some basic models and those for which the MIIPC software has ever been connected In case the relay has been connected to different firmware version of the same model a version selection window will appear to choose the correct one Figure 4 2 MODEL SELECTION Once the relay model is selected the softwar...

Page 67: ...t a model selection window will appear for choosing the version of the new file Please note that the Relay I O configuration an the Logic configuration won t be converted Figure 4 3 WARNING POP UP Finally the settings will be charged on the Enervista MII Setup on offline mode so it must be saved in order to get the new ajs file 4 2 4 PROPERTIES From the File Properties option the program will show...

Page 68: ...ay In other case an error message will be shown asking the user to convert the file using the Setting File Converter application included in this software 4 2 7 PRINT SETUP The File Print Setup option enables the user to configure the print setup for the settings file as shown in Figure 4 5 Figure 4 5 PRINTER SETUP 4 2 8 PRINT PREVIEW The File Print Preview option displays a preview of the setting...

Page 69: ...ctions in this screen are shown in Figure 4 6 Figure 4 6 PRINT PREVIEW CONTROLS 4 2 9 PRINT The File Print option prints the relay settings using Windows default active printer 4 2 10 CLOSE The File Close option exits the program It does not prompt for confirmation or save the open file ...

Page 70: ...or those users only requiring the basic functionality of the relay Figure 4 7 SETTINGS MENU Once in the corresponding sub menu either Main Settings or Advanced Settings the procedure to enter and modify any setting value is the same Select the settings group the function selected in the example is the51P function in a MIFII Edit the setting double clicking on the value for example 51Penable Modify...

Page 71: ...ith measure values presentation purposes however some of them are directly applied during the sampling and analogical numerical conversion process nominal frequency setting Therefore these settings need to be altered so they fit with the system settings 4 3 2 2 GROUP 1 GROUP 2 FUNCTION SETTINGS The M family relays provide two independent setting groups Group 1 is available in the Main Settings gro...

Page 72: ...lement I O configuration the appearance and function of this column can be depending on the state of the respective OR checkbox column OR checkbox is not checked the element consists of a drop down list in which the user can select the function that will activate the output or LED or that will be activated by the input OR checkbox is checked the element consists of a button that will activate a ne...

Page 73: ... label of up to 4 characters that will get stored to be displayed later on BLINK only for LEDs the selection of BLINK checkbox makes the LED blink alternatively switch ON and OFF instead of being fixed when it is activated MEMORY only for outputs and LEDs when MEMORY checkbox is enabled the respective element will be latched If the cause that generated the activation of the output or LED does no l...

Page 74: ...The way they are programmed is similar to the way I Os are refer to relay configuration The device will not take into account entries that are after an empty one This means that every entry after the first empty one will be ignored For example if L1 IN1 is programmed but L1 IN2 is left empty the relay will not take into account L1 IN3 and will directly evaluate L1 IN4 In the same way the relay wil...

Page 75: ...h two choices Sending the PC date and time to the unit this is synchronizing the PC and the unit Selecting a date and a time and sending it to the relay Figure 4 15 CHANGE DATE TIME Once the new date and time have been sent the user can check in the status graph or even in the relay itself that the new date time has been correctly entered ...

Page 76: ...dditional information There is a vertical scroll bar to navigate up and down the table to reach the desired information Relay model number and firmware version Relay internal date and time Values of currents voltages and powers phase and ground Protection function status pickup trip for each function Active settings group number Contact inputs and outputs status and LEDs status Information from th...

Page 77: ... and a list of the status of all inputs outputs and functions during the event Additionally the program also shows current and voltage values for all phases and ground frequency and single line sequence voltage during the event Figure 4 17 EVENTS WINDOW The retrieved events can be reviewed in this window or also saved to disk to be opened with EnerVista MII SETUP program or exported to CSV Comma S...

Page 78: ... the user can start the process to retrieve the Oscillography record stored in the relay The program will request the path and filename where the file is to be stored by means of the following form Figure 4 18 OSCILLOGRAPHY RECORD This file can be viewed using GE_OSC software the use of this software is described in manual GEK 105596 ...

Page 79: ...4 16 MIFII Digital Feeder Relay GEK 106237P 4 5 OPERATIONS 4 COMMUNICATIONS 4 4 5OPERATIONS From Operations menu the user can perform all possible operation commands Figure 4 19 OPERATIONS MENU ...

Page 80: ...a ModBus communication troubleshooting or to update the relay with a new firmware After making any change pressing Store button saves the changes without exiting the window Pressing OK saves and exits and pressing Cancel exits without saving changes 4 6 1 COMPUTER In COMPUTER dialog the user can configure the necessary adjustments to communicate with the relay from a PC Figure 4 20 COMMUNICATIONS ...

Page 81: ...EM CONNECTION for modem serial connection The modem configuration options appear at the right when this option is chosen Defaults button returns the values to the factory default ones 4 6 1 2 COMMUNICATION CONTROL In COMMUNICATIONS CONTROL box the user can view the communication status communicating to a relay or not connect to a relay when the right parameters are entered in the Computer Settings...

Page 82: ...ICATION OPTIMIZATION 4 6 1 4 PRINT SCREEN When the Print Screen button is pressed a new window appears asking if the user wants to capture the entire screen or only the active window the one with all the communication parameters Yes means capturing the whole screen and No means capturing only the communications window Then a new window appears allowing to view the captured screen to save the captu...

Page 83: ...e of data to read Setpoints Actual Values the number of registers the length of each register is of 2 bytes and the format of the data integer long float checking the checkbox at the left to make the PC start polling that address or unchecking it to stop In the lower part data can be sent to writable addresses of the relay The working is similar to reading but to send the data the user must press ...

Page 84: ...nly when there is no active communication with the relay If the PC is communicating with the relay the user must switch communication off in Communication Computer menu to activate this option When this option is selected a window appears asking for the new firmware version file to be uploaded to the relay Figure 4 26 FLASH UPDATE FILE After selecting the file that will be used to update the FLASH...

Page 85: ...t the program will request a password This password can be obtained placing an order with GE Multilin The following three parameters must be clearly indicated in the order Serial number of the unit Current model option before memory update Desired model option after memory update In a case where more than one unit needs to be updated all the serial numbers must be detailed and a different password...

Page 86: ...elay the program will not request a password After completing the previous screen and during the loading process the following screen will be displayed showing the update process status Figure 4 30 UPDATE PROCESS During the update the display and LEDs will blink until the total completion of the process Then the following screen will appear Figure 4 31 UPDATE COMPLETED ...

Page 87: ...model OPTION 1 or 2 may involve a MODBUS memory map change This may result a critical issue when the relay is integrated in a system and the user should take into account the modifications that will have to be performed in the programs that access the MIFII relay memory maps Additionally when a Flash memory update is performed the loading program will enter the default settings This means that the...

Page 88: ... the PC is communicating with the relay If the communication is not established to activate this option the user must switch communication on in Communication Computer menu When TRACES are active the ModBus communication traces will be displayed in the lower part of the screen as shown in Figure 4 32 Figure 4 32 MODBUS TRACES ...

Page 89: ...ch communication on in Communication Computer menu With MODBUS MEMORY MAP option the user can extract the complete memory map from the relay and print or save it in CSV format to be later opened with any database or spreadsheet program as MS Excel It is recommended to use this feature as memory map changes with relay model and firmware version so this is the safest way of obtaining the appropriate...

Page 90: ... VIEW 4 4 7 3 LANGUAGES LANGUAGES option is only active when there is no active communication with the relay If the PC is communicating with the relay to activate this option the user must switch communication off in Communication Computer menu Figure 4 34 LANGUAGES ...

Page 91: ...4 28 MIFII Digital Feeder Relay GEK 106237P 4 7 VIEW 4 COMMUNICATIONS 4 ...

Page 92: ...y of the relay communications ports and the EnerVista MII SETUP program The use of the keypad to modify settings is described in Chapter 8 If the computer is used to handle the settings the following steps must be considered Make sure your communication cable matches the scheme shown in Figure 3 12 Connect the communications cable between the relay or modem and the computer serial port Run the Ene...

Page 93: ...LE NA Frequency Frequency Frequency 60 Hz 50 60 Hz NA ModBus Format ModBus Format Intel Intel Motorola NA Phase CT ratio Phase CT Ratio Phase CT Ratio 1 1 4000 1 Ground CT ratio Ground CT Ratio Ground CT Ratio 1 1 4000 1 HMI Password HMI Password 0 0 9999 1 Comm Password Comm Password 1 1 255 1 Slave Address Slave Address 1 1 255 1 Communication Baud rate Comm Baud Rate 9 6 0 3 0 6 1 2 2 4 4 8 9 6...

Page 94: ...ensitive ground Pickup 51G Pickup 51G 0 005 A 0 005 0 12 A 0 001 A 51G Curve Type Curve 51G Curve 51G DEFINITE TIME DEFINITE TIME USER MOD INVERSE VERY INVERSE EXTR INVERSE INVERSE SHORT INVERSE LONG NA 51G Time Dial TD Mult 51G TD Mult 51G 0 5 0 05 2 00 IEC curves 0 01 5 0 5 20 0 ANSI curves 0 01 0 5 0 5 10 0 IAC curves 0 01 51G Definite Time Delay Def Time 51G Def Time 51G 1 00 s 0 600 00s 0 01 ...

Page 95: ...0G2 Pickup Pickup 50G2 1 In Ground 0 1 30 In Gnd 0 1 In G 50G2 Tap Pickup for sensitive ground 50G2 Pickup Pickup 50G2 0 005 A 0 005 0 12 A 0 001 A 50G2 Time Delay 50G2 Time Delay Delay 50G2 0 s 0 600 00 s 0 01 s ENERVISTA MII SETUP HMI DEFAULT RANGE STEP Thermal Image 49 49 Function THERMAL MODEL 49 Permission to Trip 49 Trip Trip Enable 49 No Yes No NA 49 Tap Pickup 49 Pickup Pickup 49 1 In Phas...

Page 96: ... Yes Yes No N A Permission for 50P2 to Init Autorecloser AR 50P2 Permission Init AR 50P2 Init Yes Yes No N A Permission for 50G2 to Init Autorecloser AR 50G2 Permission Init AR 50G2 Init Yes Yes No N A Permission for 51P to Init Autorecloser AR 51P Permission Init AR 51P Init Yes Yes No N A Permission for 51G to Init Autorecloser AR 51G Permission Init AR 51G Init Yes Yes No N A Permission for 49 ...

Page 97: ...3 Yes Yes No N A Permission for 50P2 function to trip after Shot 3 AR 50P2 Shot 3 Permission AR 50P2 Shot 3 Yes Yes No N A Permission for 50G2 function to trip after Shot 3 AR 50G2 Shot 3 Permission AR 50G2 Shot 3 Yes Yes No N A Permission for 51P function to trip after Shot 3 AR 51P Shot 3 Permission AR 51P Shot 3 Yes Yes No N A Permission for 51G function to trip after Shot 3 AR 51G Shot 3 Permi...

Page 98: ...s the time during which the tripping contact will remain closed as a minimum in case of fault If the fault persists for a longer time than the set value the tripping contact will remain closed and will be opened immediately after the fault is cleared while if the fault is shorter than the set time the relay will maintain the contact closed for this set time ...

Page 99: ...EC curves 0 01 5 0 5 20 0 ANSI curves 0 01 0 5 0 5 10 0 IAC curves 0 01 51G Definite Time Delay Def Time 51G Def Time 51G 1 00 0 00 600 00 s 0 01 s ENERVISTA MII SETUP HMI DEFAULT RANGE STEP Ph IOC High Set group 2 PHASE IOC 50P1 group 2 Phase IOC 50P1 50P1 Permission to Trip Trip Enable 50P1 Trip Enable 50P1 No Yes No NA 50P1 Pickup Pickup 50P1 Pickup 50P1 1 In Phase 0 1 30 In Ph 0 1 In Ph 50P1 T...

Page 100: ...1 In Ph Overload Percent Alarm Alarm Level 49 Alarm Level 49 80 70 100 ITH Heating Time Constant τ1 Heat Time 49 Heat Time 49 6 3 600 min 1 min Cooling Time Constant τ2 Cool Time 49 Cool Time 49 1 1 6 times τ1 1 ENERVISTA MII SETUP HMI DEFAULT RANGE STEP Parameters User Curve User Curve A A Parameter A Parameter 0 0500 0 0000 125 0000 0 0001 B B Parameter B Parameter 0 0000 0 0000 3 0000 0 0001 P ...

Page 101: ...ES Y N NA 51G Trip enable disable by digital input 51G disabled by di YES Y N NA 49 Trip enable disable by digital input 49 disabled by di YES Y N NA General Trip enable disable by digital input Trip disabled by di YES Y N NA Protection status in service out of service Protection status YES Y N NA Digital output 1 active non active Output 1 YES Y N NA Digital output 2 active non active Output 2 YE...

Page 102: ...s in the family must be used there are 195 different curves for each curve type depending on the Time Dial Selected if the curve type selected is DEFINITE TIME then the Time Dial setting is ignored and the time delay used is the one specified in DEFINITE TIME setting OSCILLOGRAPHY MASK ENERVISTA MII SETUP DEFAULT RANGE STEP Oscillography masks Oscillography mask Oscillo by communications Oscillo b...

Page 103: ...ONIZATION MIFII includes an internal clock to time tag events This clock can be either synchronized with the computer clock or set manually using the EnerVista MII SETUP software program see Setpoints Clock It can also be set to a given Date and Time using the faceplate keypad DATE TIME menu entry ...

Page 104: ...red function it is required that the input voltage level is reset and reactivated Figure 6 1 INPUT RESPONSE FOR LEVEL AND PULSE OPTIONS The minimum operation time for a valid PULSE input is over 0 015 seconds Input elements are divided into two three in models with recloser tthree groups besides the No definition one Up to eight elements can be configured to be activated by the same input providin...

Page 105: ...oup that contains the desired elements in this example INHIBITIONS BY DIGITAL INPUT 1 This group includes 8 elements from which we can select the ones we want to operate in the input and invert them by clicking on the NOT checkbox In the example below all functions have been assigned to the input and all of them have been inverted Finally to validate the selected configuration the user must click ...

Page 106: ...e user must simply open the I O configuration selection list of the desired input Once opened all possible configuration functions will be shown and the user will then be able to select one of them To invert the selected function the user must click on the NOT checkbox to the right of the functions menu Figure 6 3 SIMPLE ACTION INPUT CONFIGURATION ONE ELEMENT ASSIGNMENT In the example above Input ...

Page 107: ...lements disabled MISCELLANEOUS 2 AR External Initiation Input AR External Initiation Input AR External Block Input AR External Block Input INPUTS 52 A status Breaker closed indication 52 B status Breaker open indication Trip contact close PULSE This element allows activating the trip output Group change This setting has to be enabled for setting group 2 If disabled the active setting group is the ...

Page 108: ...re programmed for ALARM System alarm and TRIP The TRIP LED activates when the TRIP contact closes The READY LED turns on when all the following conditions are fulfilled The relay status is READY At least one of the protection functions of the active table is enabled The trip of at least one of the enabled functions is also enabled The default configuration for outputs is as follows The default LED...

Page 109: ...Ds can be set to be fixed or blinking Example If we want to assign a phase differential trip to an output or LED the output or LED must be programmed with 50P1 trip 50P2 trip and 51P trip elements To do this check the OR box in the corresponding Output or LED line for this case Output1 and LED1 Then click on the OR button that appears in the I O configuration column select the desired group ELEMEN...

Page 110: ...ip of Phase B 50P2 element 50 2c Trip Trip of Phase C 50P2 element PHASE TRIPS 2 51a Trip Trip of Phase A 51P element 51b Trip Trip of Phase B 51P element 51c Trip Trip of Phase C 51P element ELEMENT TRIPS 50P1 trip 50P1 element trip 50G1 trip 50G1 element trip 50P2 trip 50P2 element trip 50G2 trip 50G2 element trip 51P trip 51P element trip 51G trip 51G element trip 49 trip 49 element trip Genera...

Page 111: ...condition for 50P2 element exists 50G2 virtual trip Trip condition for 50G2 element exists 51P virtual trip Trip condition for 51P element exists 51G virtual trip Trip condition for 51G element exists 49 virtual trip Trip condition for 49 element exists General virtual trip Any virtual trip of the above mentioned elements INPUTS OUTPUTS Input 1 Digital input 1 Input 2 Digital input 2 MIXED 1 BKR f...

Page 112: ...To configure a logic box we can proceed in the same way as for the outputs LEDs configuration per signal If we want to assign more than one function to each signal they must be all in the same group We must click on the OR button next on I O CONFIGURATION and then select the desired group etc There are two timers pickup and dropout timers which can be assigned to each logic box LOGIC I O CONFIGURA...

Page 113: ...y logic ORs to each AND logic input as well as to invert the AND outputs For this purpose please refer to the I O Configuration section in this manual Logics can be assigned both to LEDs or outputs so that each user can create the desired configuration for a specific application The Application Notes section in this manual describes several real application examples ...

Page 114: ...NLY OPTION 2 MODELS 7 1 LOGIC DESCRIPTION 7 Time diagram for the logic configuration Pickup Dropout Timer Timer Logic input Logic output Pickup timer Pickup Dropout Dropout Timer Timer Timer Logic input Logic output Logic input Logic output Pickup Dropout Timer Timer ...

Page 115: ...rip Trip of Phase C 50P2 element PHASE TRIPS 2 51a Trip Trip of Phase A 51P element 51b Trip Trip of Phase B 51P element 51c Trip Trip of Phase C 51P element ELEMENT TRIPS 50P1 trip 50P1 element trip 50G1 trip 50G1 element trip 50P2 trip 50P2 element trip 50G2 trip 50G2 element trip 51P trip 51P element trip 51G trip 51G element trip 49 trip 49 element trip General trip Any trip of the above menti...

Page 116: ...L INPUTS 50P1 disabled by di Element 50P1 disabled 50G1 disabled by di Element 50G1 disabled 50P2 disabled by di Element 51P disabled 50G2 disabled by di Element 51G disabled 51P disabled by di Element 50P2 disabled 51G disabled by di Element 50G2 disabled 49 disabled by di Element 49 disabled Trip disabled by di Trip of all elements disabled INPUTS OUTPUTS Output 1 Digital Output 1 Output 2 Digit...

Page 117: ...t least one element has its trip enabled MIXED 2 SETTINGS GROUP Group 2 active Local Remote It s Local when the HMI is inside the MAIN SETTINGS ADVANCED SETTINGS or OPERATIONS menu 1 A 52a or 52b input must be configured If there are two inputs configured as 52a and 52b the relay will not take into account the input configured as 52a and will act according only to the status of the input configure...

Page 118: ...nd can be digital inputs outputs status and others or internal information as the firmware revision Main settings and advanced settings comprise product setup communications and protection elements adjustments Operations are the available commands that can be performed in the relay These types of messages are located within a menu structure that groups the information into categories This chapter ...

Page 119: ...three phase and neutral currents If the relay is not showing the main screen you can return to it from any other screen by pressing the Escape key as many times as necessary until exiting the menu structure From the main screen the Menu key enters the menu structure From that point on the user can navigate through the menu structure using Up and Down arrows to move horizontally Enter to enter subm...

Page 120: ... other key corresponding screen in the menu structure is shown As an example pressing ENTER key the Thermal Capacity Used screen is shown as pressing this key the display enters in One Key Operation menu 8 3 2 LEDS The faceplate of the MIFII relay has six LEDs that show the relay status as well as pickup and trip status LEDs are grouped in two columns and three rows as shown in the following figur...

Page 121: ...8 4 MIFII Digital Feeder Relay GEK 106237P 8 3 ALPHANUMERIC DISPLAY AND LEDS 8 KEYPAD AND DISPLAY 8 ...

Page 122: ...me of the trip When a fault occurs trip information is automatically shown in the display Pressing ENTER key main screen will be shown again In order to perform a RESET operation display must be in main screen showing phase and ground currents in this situation pressing ESC RESET key for more than 3 seconds a RESET operation will be performed 1 Day month Main screen Ia 0 0 Ib 0 0 Ic 0 0 Ig 0 0 Ent...

Page 123: ...ith the arrow keys until the screen shows the desired password next press enter for confirmation and the relay will accept and store the setting change The setting password protection will then be disabled for 15 minutes after the last setting change is made to the relay or until a reset operation the same as to reset LEDs pressing Esc for more than 3 seconds from the main screen is performed The ...

Page 124: ...GEK 106237P MIFII Digital Feeder Relay 8 7 8 KEYPAD AND DISPLAY 8 5 MENU TREE 8 8 5MENU TREE ...

Page 125: ...8 8 MIFII Digital Feeder Relay GEK 106237P 8 5 MENU TREE 8 KEYPAD AND DISPLAY 8 ...

Page 126: ...GEK 106237P MIFII Digital Feeder Relay 8 9 8 KEYPAD AND DISPLAY 8 5 MENU TREE 8 ...

Page 127: ...8 10 MIFII Digital Feeder Relay GEK 106237P 8 5 MENU TREE 8 KEYPAD AND DISPLAY 8 ...

Page 128: ...GEK 106237P MIFII Digital Feeder Relay 8 11 8 KEYPAD AND DISPLAY 8 5 MENU TREE 8 ...

Page 129: ...8 12 MIFII Digital Feeder Relay GEK 106237P 8 5 MENU TREE 8 KEYPAD AND DISPLAY 8 ...

Page 130: ...GEK 106237P MIFII Digital Feeder Relay 8 13 8 KEYPAD AND DISPLAY 8 5 MENU TREE 8 ...

Page 131: ...8 14 MIFII Digital Feeder Relay GEK 106237P 8 5 MENU TREE 8 KEYPAD AND DISPLAY 8 ...

Page 132: ...1 VISUAL INSPECTION 9 9 RELAY COMMISSIONING 9 1VISUAL INSPECTION Unpack the relay and verify that no parts are broken and that the relay has not suffered any damage during transit Verify that the model number indicated on the faceplate corresponds to the model ordered ...

Page 133: ...hich the relay operates according to the curve under test It is important to stress that the test accuracy depends on the power supply network conditions as well as on the instruments used Functional tests carried out under inappropriate power supply conditions or using inappropriate instruments can be used for ensuring that the relay works roughly correctly and therefore for verifying its charact...

Page 134: ...ce 1 DC voltage power supply 1 timing device 1 Multi meter Optionally it is advisable to have a PC available with the EnerVista MII SETUP software installed Relay wiring diagram Connect the relay as shown in For safety reasons the external protection earth terminal should be securely grounded Energize the relay through terminals Figure 9 1 TEST CONNECTIONS FOR MIFII RELAY ...

Page 135: ... MIFII Digital Feeder Relay GEK 106237P 9 4 TARGET LEDS 9 RELAY COMMISSIONING 9 9 4TARGET LEDS Check that pressing the ESC RESET button for more than 3 seconds all the front target LEDs light up and reset ...

Page 136: ...t is open and that the relay can communicate with the PC Check this point requesting the relay model number from the PC Voltage test and maximum consumption is shown below Shown values are only illustrative as due to the nature of the internal power supply switched power supply the consumption currents are high frequency currents and the meters used measure these values with a poor accuracy Model ...

Page 137: ...rameters that have to be set in the computer should match the relay default communication settings The factory default settings for the MIFII relay are Using the EnerVista MII SETUP program communicate with the relay and in the Status window check that the communications are not lost at any time Perform this test on both communications ports This test is carried out at the minimum and maximum volt...

Page 138: ...ests Since the MIFII relay has a large number of settings a list of all the settings necessary for all tests will not be given here but rather only the specific settings required for each test indicated These tests are only valid for the default factory configuration Different configurations involving modifications in certain elements such as different contact configuration will require a subseque...

Page 139: ... A9 A10 Check that when voltage is applied to one contact input only this input gets active and the other one remains inactive Use the INFORMATION menu on the faceplate or a PC and the ACTUAL VALUES menu in the EnerVista MII SETUP program Actual Actual Values to easily check which input gets active for each test Repeat this test at minimum and maximum permissible voltages ...

Page 140: ...ut OUT2 terminals A7 B8 are closed and the PICK UP TIME OC and TRIP LEDs light up Enable only 50P element and set its pickup to the minimum value Inject a current through phase A terminals equal to 2 x In phase to trip the relay Check that the trip output terminals A5 A6 and auxiliary output OUT3 terminals B9 A7 are closed and the PICK UP PHASE INST and TRIP LEDs light up Enable only element 49 an...

Page 141: ...relay measures Ia Ib and Ic with an accuracy better than 3 Set the relay at 60Hz and repeat the test GROUND CURRENT Set the relay to 50Hz and apply the following current Check that the relay measures the current with accuracy better than 3 Set the relay at 60Hz and repeat the test PHASE 1 2 3 4 Ia Amps 0 5 x In phase Ib Amps 0 1 x In phase 1 x In phase Ic Amps 2 x In phase 1 2 In Amps 0 1 x In gro...

Page 142: ...eded If the time delay is set to 0 sec the relay operating time will be between 10 to 50 ms Also the customer has to test pickup With 0 9 times the pickup current the relay should not trip With 1 1 times the pickup current the relay should trip in between 10 to 50 ms With 4 times the pickup current the relay should trip in between 10 to 40 ms The test should be carried out for phases A B and C ...

Page 143: ...ded If the time delay is set to 0 sec the relay operating time will be between 10 to 50 ms Also the customer has to test pickup With 0 9 times the pickup current the relay should not trip With 1 1 times the pickup current the relay should trip in between 10 to 50 ms With 4 times the pickup current the relay should trip in between 10 to 40 ms The test should be carried out for phases A B and C ...

Page 144: ...y 50G1 element Set time delay as needed If the time delay is set to 0 sec the relay operating time will be between 10 to 50 ms Also the customer has to test pickup With 0 9 times the pickup current the relay should not trip With 1 1 times the pickup current the relay should trip in between 10 to 50 ms With 4 times the pickup current the relay should trip in between 10 to 40 ms ...

Page 145: ...2 element Set time delay as needed If time delay is set to 0 sec relay operating time will be between 10 to 50 ms Also the customer has to test pickup With 0 9 times the pickup current the relay should not trip With 1 1 times the pickup current the relay should trip in between 10 to 50 ms With 4 times the pickup current the relay should trip in between 10 to 40 ms ...

Page 146: ...trip Apply 1 5 times the pickup current and the relay should trip between 15 3 and 19 7 sec Apply 5 times the pickup current and the relay should trip between 4 0 and 4 6 sec 9 15 2 IEC VERY INVERSE CURVE Set the relay as follows Apply 0 9 times the pickup current into phase B and the relay should not trip Apply 1 5 times the pickup current and the relay should trip between 23 4 and 31 8 sec Apply...

Page 147: ...lay should trip between 2 4 and 2 8 sec 9 15 6 ANSI EXTREMELY INVERSE CURVE Set the relay as follows Apply 0 9 times the pickup current into phase C and the relay should not trip Apply 1 5 times the pickup current and the relay should trip between 17 2 and 23 6 sec Apply 5 times the pickup current and the relay should trip between 1 7 and 1 35 sec 9 15 7 IAC INVERSE CURVE Set the relay as follows ...

Page 148: ...lay should trip between 2 31 and 2 60 sec 9 15 10 IAC INVERSE LONG CURVE Set the relay as follows Apply 0 9 times the pickup current at the ground terminals and the relay should not trip Apply 1 5 times the pickup current and the relay should trip between 122 17 and 137 77 sec Apply 5 times the pickup current and the relay should trip between 31 35 and 35 36 sec 9 15 11 IAC INVERSE SHORT CURVE Set...

Page 149: ...pickup current into phase A and the relay should not trip Apply 1 1 times the pickup current and the relay should trip in 1 0 sec Acceptable time range is between 1 00 and 1 06 sec Apply 4 times the pickup current and the relay should trip in 1 0 sec Acceptable time range is between 1 00 and 1 06 sec 51P SETTINGS GROUP Curve DEFINITE TIME Definite Time Delay 1 0 ...

Page 150: ... pickup current and the relay should trip between 15 3 and 19 7 sec Apply 5 times the pickup current and the relay should trip between 4 1 and 4 5 sec 9 16 2 IEC VERY INVERSE CURVE Set the relay as follows Apply 0 9 times the pickup current at the ground terminals and the relay should not trip Apply 1 5 times the pickup current and the relay should trip between 23 4 and 31 8 sec Apply 5 times the ...

Page 151: ...n 27 and 39 sec Apply 5 times the pickup current and the relay should trip between 1 5 and 1 85 sec 9 16 4 ANSI INVERSE CURVE Set the relay as follows Apply 0 9 times the pickup current at the ground terminals and the relay should not trip Apply 1 5 times the pickup current and the relay should trip between 36 2 and 51 3 sec Apply 5 times the pickup current and the relay should trip between 3 88 a...

Page 152: ...t and the relay should trip between 1 14 and 1 34 sec 9 16 7 IAC INVERSE CURVE Set the relay as follows Apply 0 9 times the pickup current at the ground terminals and the relay should not trip Apply 1 5 times the pickup current and the relay should trip between 10 86 and 12 25 sec Apply 5 times the pickup current and the relay should trip between 3 69 and 4 16 sec 9 16 8 IAC VERY INVERSE CURVE Set...

Page 153: ... current and the relay should trip between 31 35 and 35 36 sec 9 16 11 IAC INVERSE SHORT CURVE Set the relay as follows Apply 0 9 times the pickup current at the ground terminals and the relay should not trip Apply 1 5 times the pickup current and the relay should trip between 1 38 and 1 56 sec Apply 5 times the pickup current and the relay should trip between 0 53 and 0 60 sec 9 16 12 EPTAR C CUR...

Page 154: ...the ground terminals and the relay should not trip Apply 1 1 times the pickup current and the relay should trip in 1 0 sec Acceptable time range is between 1 00 and 1 06 sec Apply 4 times the pickup current and the relay should trip in 1 0 sec Acceptable time range is between 1 00 and 1 06 sec MODEL E DIRECTIONAL UNITS 51G SETTINGS GROUP Curve DEFINITE TIME Definite Time Delay 1 0 ...

Page 155: ...ermal Image Element after each test to start the following one from the same cold status 49 SETTINGS GROUP Pickup 0 4 x In Heating Time Constant T1 3 min Cooling Time Constant T2 1 times T1 RELAY RATED CURRENT AMPS APPLIED CURRENT AMPS TIMES IN SET IN THE RELAY OPERATING TIME SEC 5 4 0 2 48 5 53 6 10 0 5 7 06 7 80 20 0 10 1 77 1 95 RELAY RATED CURRENT AMPS APPLIED CURRENT AMPS TIMES IN SET IN THE ...

Page 156: ...G 9 18 TIME SYNCHRONIZATION 9 9 18TIME SYNCHRONIZATION Synchronize the relay date and time with the PC using the EnerVista MII SETUP communications program SETPOINT CLOCK Check using the keypad and display that the relay is actually in synchronism with the computer ...

Page 157: ... 0 5 10 0 IAC curves 0 01 51P Definite Time Delay Def Time 51P Def Time 51P 0 00 600 00 s 0 01 s Ground TOC Function GROUND TOC 51G GROUND TOC 51G 51G Permission to Trip Trip Enable 51G Trip Enable 51G Yes No NA 51G Pickup for 1 5 A ground Pickup 51G Pickup 51G 0 10 2 40 In Gnd 0 01 In Gnd 51G Pickup for sensitive ground Pickup 51G Pickup 51G 0 005 0 12 A 0 001 A 51G Curve Type Curve 51G Curve 51G...

Page 158: ...hots AR Max Shots 1 4 1 Delay before 1st reclosure AR Dead Time Shot 1 AR Dead Time 1 0 1 600 0 01 Delay before 2nd reclosure AR Dead Time Shot 2 AR Dead Time 2 0 1 600 0 01 Delay before 3rd reclosure AR Dead Time Shot 3 AR Dead Time 3 0 1 600 0 01 Delay before 4th reclosure AR Dead Time Shot 4 AR Dead Time 4 0 1 600 0 01 Time delay to reset from lockout status AR Reset Lockout Time AR Rst LO Dela...

Page 159: ...n to trip after Shot 2 AR 51G Shot 2 Permission AR 51G Shot 2 Yes No N A Permission for 49 function to trip after Shot 2 AR 49 Shot 2 Permission AR 49 Shot 2 Yes No N A Permission for 50P1 function to trip after Shot 3 AR 50P1 Shot 3 Permission AR 50P1 Shot 3 Yes No N A Permission for 50G1 function to trip after Shot 3 AR 50G1 Shot 3 Permission AR 50G1 Shot 3 Yes No N A Permission for 50P2 functio...

Page 160: ...sion to Trip Trip Enable 51G Trip Enable 51G Yes No NA 51G Pickup Value 1 5 A ground Pickup 51G Pickup 51G 0 10 2 40 In Gnd 0 01 In G 51G Pickup Value sensitive ground Pickup 51G Pickup 51G 0 005 0 12 A 0 001 A 51G Curve Type Curve 51G Curve 51G DEFINITE TIME USER MOD INVERSE VERY INVERSE EXTR INVERSE INVERSE LONG INVERSE SHORT NA 51G Time Dial TD mult 51G TD mult 51G 0 05 2 00 IEC curves 0 01 0 5...

Page 161: ... In Ph Overload Percent Alarm Alarm Level 49 Alarm Level 49 70 100 ITH Heating Time Constant τ1 Heat Time 49 Heat Time 49 3 600 min 1 min Cooling Time Constant τ2 Cool Time 49 Cool Time 49 1 6 times τ1 1 Parameters User Curve User Curve A A Parameter A Parameter 0 0000 125 0000 0 0001 B B Parameter B Parameter 0 0000 3 0000 0 0001 P P Parameter P Parameter 0 0000 3 0000 0 0001 Q Q Parameter Q Para...

Page 162: ...put 51G disabled by di Y N NA 49 Trip enable disable by digital input 49 disabled by di Y N NA General Trip enable disable by digital input Trip disabled by di Y N NA Protection status in service out of service Protection status Y N NA Digital output 1 active non active Output 1 Y N NA Digital output 2 active non active Output 2 Y N NA Digital output 3 active non active Output 3 Y N NA Digital out...

Page 163: ...NING 9 9 19 2 2 OSCILLOGRAPHY MASKS OSCILLOGRAPHY MASK ENERVISTA MII SETUP USER SETTING RANGE Oscillo by communications Oscillo by comm Yes No Oscillo by digital input Oscillo by digital input Yes No Oscillo by trip Oscillo by trip Yes No Oscillo by pickup Oscillo by pickup Yes No ...

Page 164: ...testing Operational conditions as defined in section 3 must not be exceeded in any case The relay should be mounted on a vertical surface Figure 3 2 shows the diagram for panel drilling and mounting Given that the design of the MIFII unit is based on high performance digital technology it is not necessary to recalibrate the relay However if the tests show that it is necessary to readjust the relay...

Page 165: ...ossible preferably 25 cm or less to guarantee maximum protection In this way capacitors that are internally connected between the inputs and ground divert high frequency disturbances directly to ground without passing through the electronic circuits with the result that the circuits are perfectly protected In addition this connection also guarantees the physical safety of the personnel who have to...

Page 166: ... of the keypad and display the detection of some of the most likely circuit failures Testing the unit is recommended at intervals of 2 years or more Although the built in diagnosis does not reduce the average time between failures it does increase the availability of the protection because it allows a drastic reduction in the average interruption time involved in detecting and repairing the fail T...

Page 167: ...NANCE 10 10 4CLEANING INSTRUCTIONS In case of detecting accumulated pollution the unit can be cleaned with a clean cloth either dry or slightly dampened with a cleaner containing alcohol Abrasive cleaners must be avoided as these can damage the metallic surface or the electrical connection elements ...

Page 168: ... do A2 The settings configuration via HMI is secured by a password so no unauthorized person can change any setting The relay password by default is 1 so when the relay asks to ENTER PASSWORD you have to select with the up arrow button the number 1 and then press the enter button Q3 What can I do if I forget the HMI password A3 Using the HMI it is possible to see an encrypted numerical value corre...

Page 169: ...ounded in order to reduce noise Q9 How can I get the last version of firmware PC software and instruction manual A9 Urgent Via Internet on our website www gedigitalenergy com multilin Make sure you subscribe to all MIFII data in order to be informed about updates by e mail Post Sending a fax to GE Multilin 34 94 485 88 45 Q10 My MIFII unit has been powered off and I do not know if the stored infor...

Page 170: ... the display if in 15 minutes no key has been pressed By pressing any key the display turns on again Q14 I want to pint view all the relay settings in one window how can I do it A14 In ENERVISTA MII Setup it is possible to see all the settings in a single window After the communication with the relay from the FILE menu of the program you can PRINT or PREVIEW the settings Q15 Do harmonics influence...

Page 171: ...11 4 MIFII Digital Feeder Relay GEK 106237P 11 1 MIFII FAQ 11 MII FAMILY FAQ FREQUENTLY ASKED QUESTIONS 11 ...

Page 172: ...ed in the front panel can result in permanent component damage to the relay s power supply Ensure that the source CT secondary matches the relay CT rated current MIFII can be ordered with either 1A or 5A phase and ground CTs Verify that the relay rated current indicated in the front panel matches the secondary rating of the connected CTs Unmatched CTs may result in equipment damage or inadequate p...

Page 173: ...odified a new file has to be generated using EnerVista MII SETUP software Do not configure the two digital inputs in MIFII to the same logical value If done MIFII will evaluate and monitor only the second digital input resulting in the first input being useless There are two exceptions to this rule configuring both inputs to the same value is allowed whenever 1 The assigned value is No definition ...

Page 174: ...enabled Output not assigned Inappropriate setting group Set the element permission to ENABLE Program the output to the desired element using ENERVISTA MII SETUP SETPOINT RELAY CONFIGURATION Make sure that desired group is active group 1 or group 2 and or that there is no settings group change input that could modify the active group GENERAL When feeding the unit no indicator is light up Insufficie...

Page 175: ...13 2 MIFII Digital Feeder Relay GEK 106237P 13 1 MIFII TROUBLESHOOTING GUIDE 13 TROUBLESHOOTING GUIDE 13 ...

Page 176: ...h currents and following an inverse I vs t equation trip slower for lower fault currents Operating times range from tens of milliseconds to some seconds for slower operation curves However for some applications this type of protective relay has some limitations In the case of two transformers operating in parallel feeding a distribution bus bar working both of them at 70 of rated load if an overcu...

Page 177: ...ng is the main concern leaving apart the dynamic effects Thermal Image relays operate when the computed temperature Thermal Image of the machine reaches a level considered to be dangerous Compared with an overcurrent relay the thermal image relay does not start when a fault is detected but it is continuously operating computing the thermal status of the protected piece of equipment The operating t...

Page 178: ...ratures under 400 ºC is much lower that the considered effects being this assumption a conservative one from the protection point of view the differential equation describing the heating process of the element can be written as We can read this equation as the heat generated on the resistance during a differential period of time dt is used to rise the element temperature and to rise the ambient te...

Page 179: ...2 and 4 can be written as where I represents the current value in per unit based on the permanent current this is To compute the tripping time substitute in 7 with θ 1 and you get It is necessary that I 1 Equation 9 can also be written as a function of current in p u if it has been maintained permanently in other case it is necessary to compute the equivalent current that is represented by the let...

Page 180: ... function allows to design high performance protective devices Besides that thanks to the digital technology possibilities more accurate models can be used taking into account radiation effects and other heating sources different that Joule effect Equation 9 evaluation requires extensive computing resources and thus is not directly implemented in the protection relay Instead an iterative algorithm...

Page 181: ...called Time Constant and it is represented by the letter τ Using an equation it is the time it takes to reach an intermediate temperature θi where If θ0 is the temperature origin at a given time the temperature can be written as Where θ Temperature increase at a given time θN Rated temperature temperature reached if I IN In Protected element rated current I Current flowing through the protected el...

Page 182: ...ation Where Ie Ime Itap Ime Current at which the protected element had stabilised Itap Programmed tap current and the rest of the symbols have the same meaning as in the previous equation In the curves the Thermal Equivalent Current is represented by the letter Ieq and this is the value that the relay shows corresponding to the thermal image of the protected element The relay is running the therma...

Page 183: ...A 8 MIFII Digital Feeder Relay GEK 106237P A 6 MIFII THERMAL CURVES APPENDIXA A Figure A 1 THERMAL CURVE FOR Τ1 3 MINUTES ...

Page 184: ...GEK 106237P MIFII Digital Feeder Relay A 9 APPENDIX A A 6 MIFII THERMAL CURVES A Figure A 2 THERMAL CURVES FOR Τ1 3 MIN ...

Page 185: ...A 10 MIFII Digital Feeder Relay GEK 106237P A 6 MIFII THERMAL CURVES APPENDIXA A ...

Page 186: ...the unit will show a pickup signal and generate no trip For 1 05 V 20 00 trip time will be For V 20 00 trip time will be the same as for 20 times the setting Where D Time Dial Table B 1 GE IEC BS142 INVERSE TIME CURVE CONSTANTS CURVE NAME A P Q B K Extremely inverse IEC Curve C 80 2 1 0 0 Very inverse IEC Curve B 13 5 1 1 0 0 Inverse IEC Curve A 0 14 0 02 1 0 0 ...

Page 187: ...12 15 13 50 16 20 18 90 21 60 24 30 27 00 3 00 0 34 0 68 1 35 2 03 2 70 3 38 4 05 4 73 5 40 6 08 6 75 8 10 9 45 10 80 12 15 13 50 4 00 0 23 0 45 0 90 1 35 1 80 2 25 2 70 3 15 3 60 4 05 4 50 5 40 6 30 7 20 8 10 9 00 5 00 0 17 0 34 0 68 1 01 1 35 1 69 2 03 2 36 2 70 3 04 3 38 4 05 4 73 5 40 6 08 6 75 6 00 0 14 0 27 0 54 0 81 1 08 1 35 1 62 1 89 2 16 2 43 2 70 3 24 3 78 4 32 4 86 5 40 7 00 0 11 0 23 ...

Page 188: ...GEK 106237P MIFII Digital Feeder Relay B 3 APPENDIX B B 1 IEC BS142 CURVES B Figure B 1 IEC BS142 INVERSE CURVES ...

Page 189: ...B 4 MIFII Digital Feeder Relay GEK 106237P B 1 IEC BS142 CURVES APPENDIXB B Figure B 2 IEC BS142 VERY INVERSE CURVES ...

Page 190: ...GEK 106237P MIFII Digital Feeder Relay B 5 APPENDIX B B 1 IEC BS142 CURVES B Figure B 3 IEC BS142 EXTREMELY INVERSE CURVES ...

Page 191: ...rate no trip For 1 05 V 20 00 trip time will be For V 20 00 trip time will be the same as for 20 times the setting Where M Time Dial Table B 3 GE ANSI INVERSE TIME CURVE CONSTANTS CURVE NAME A B C D E Extremely inverse 0 0399 0 2294 0 5000 3 0094 0 7222 Very inverse 0 0615 0 7989 0 3400 0 2840 4 0505 Inverse 0 0274 2 2614 0 3000 4 1899 9 1272 ...

Page 192: ...26 50 3 00 0 27 0 54 1 07 1 61 2 15 2 68 3 22 3 76 4 30 4 83 5 37 6 44 7 52 8 59 9 66 10 74 4 00 0 17 0 34 0 68 1 02 1 36 1 71 2 05 2 39 2 73 3 07 3 41 4 09 4 78 5 46 6 14 6 82 5 00 0 13 0 26 0 52 0 78 1 04 1 30 1 56 1 82 2 08 2 34 2 60 3 12 3 64 4 16 4 68 5 20 6 00 0 11 0 22 0 43 0 65 0 86 1 08 1 30 1 51 1 73 1 95 2 16 2 59 3 03 3 46 3 89 4 32 7 00 0 09 0 19 0 38 0 57 0 76 0 94 1 13 1 32 1 51 1 7...

Page 193: ...B 8 MIFII Digital Feeder Relay GEK 106237P B 2 ANSI CURVES APPENDIXB B Figure B 4 ANSI INVERSE ...

Page 194: ...GEK 106237P MIFII Digital Feeder Relay B 9 APPENDIX B B 2 ANSI CURVES B Figure B 5 ANSI VERY INVERSE ...

Page 195: ...B 10 MIFII Digital Feeder Relay GEK 106237P B 2 ANSI CURVES APPENDIXB B Figure B 6 ANSI EXTREMELY INVERSE ...

Page 196: ... Where TDM Time Dial Table B 5 GE IAC INVERSE TIME CURVE CONSTANTS IAC CURVE SHAPE HMI A B C D E IAC Extremely Inverse Extr Inverse 0 0040 0 6379 0 6200 1 7872 0 2461 IAC Very Inverse Very Inverse 0 0900 0 7955 0 1000 1 2885 7 9586 IAC Inverse Mod Inverse 0 2078 0 8630 0 8000 0 4180 0 1947 IAC Inverse Long Inverse Long 0 3754 17 8307 0 32 23 7187 23 8978 IAC Inverse Short Inverse Short 0 0442 0 04...

Page 197: ...68 0 160 0 154 0 148 1 0 1 155 0 749 0 532 0 443 0 392 0 360 0 337 0 320 0 307 0 297 2 0 2 310 1 499 1 064 0 885 0 784 0 719 0 674 0 640 0 614 0 594 4 0 4 621 2 997 2 128 1 770 1 569 1 439 1 348 1 280 1 229 1 188 6 0 6 931 4 496 3 192 2 656 2 353 2 158 2 022 1 921 1 843 1 781 8 0 9 242 5 995 4 256 3 541 3 138 2 878 2 695 2 561 2 457 2 375 10 0 11 552 7 494 5 320 4 426 3 922 3 597 3 369 3 201 3 072...

Page 198: ...GEK 106237P MIFII Digital Feeder Relay B 13 APPENDIX B B 3 IAC CURVES B Figure B 7 IAC INVERSE GES 7001 ...

Page 199: ...B 14 MIFII Digital Feeder Relay GEK 106237P B 3 IAC CURVES APPENDIXB B Figure B 8 IAC VERY INVERSE GES 7002 ...

Page 200: ...GEK 106237P MIFII Digital Feeder Relay B 15 APPENDIX B B 3 IAC CURVES B Figure B 9 IAC EXTREMELY INVERSE GES 7005 ...

Page 201: ...B 16 MIFII Digital Feeder Relay GEK 106237P B 3 IAC CURVES APPENDIXB B Figure B 10 IAC INVERSE LONG GES 7004 ...

Page 202: ...GEK 106237P MIFII Digital Feeder Relay B 17 APPENDIX B B 3 IAC CURVES B Figure B 11 IAC INVERSE LONG GES 7003 ...

Page 203: ...B 18 MIFII Digital Feeder Relay GEK 106237P B 3 IAC CURVES APPENDIXB B ...

Page 204: ...l Settings provides with different ways to access and or modify the relay information Differences between selecting the Intel or Motorola setting are explained in the following table INTEL MOTOROLA ModBus Map Addressing One byte at a time One word at a time Data presentation High Byte Low Byte Low Byte High Byte Operations Selection Confirmation Confirmation ...

Page 205: ...Reply FIELD LENGTH Relay address 1 Byte Function 1 Byte 03h Beginning address 1 word High Byte Low Byte Number of registers 1 word High Byte Low Byte CRC 1 word FIELD LENGTH Relay address 1 Byte Function 1 Byte Nº of bytes 1 Byte Number of registers 2 Value of the registers n data bytes CRC 1 word ADDRESS FUNCTION BEGINNING REGS CRC 01H 03H 04FEH 004BH 653DH ADDRESS FUNCTION BYTES DATA0 DATA74 CRC...

Page 206: ...list is as follows INTEL SELECTION Intel Request Intel Reply INTEL MOTOROLA COMMAND SELECTION CONFIRMATION CONFIRMATION Setting change 01H 02H 02H Thermal Image Reset 03H 04H 04H Open breaker 07H 08H 08H LEDs reset 09H 0AH 0AH Change to group 1 0DH 0EH 0EH Change to group 2 0FH 10H 10H Oscillography trigger 17H 18H 18H Set number of openings 2FH 30H 30H Set I2 31H 32H 32H Close breaker 39H 3AH 3AH...

Page 207: ...ddress 1 word 0000H High byte low byte Number of registers 1 word 0001H High byte low byte Number of bytes 1 byte 06H Value of the registers Register1 Command code Low byte High byte Register2 Relay password Low byte High byte Register3 Constant value CRC 1 word FIELD LENGTH Relay address 1 byte Function 1 byte 10H Beginning address 1 word 0000H High byte low byte Number of registers 1 word 0003H ...

Page 208: ... relay password Intel Request Intel Reply Motorola Request Motorola Reply FIELD LENGTH Relay address 1 byte Function 1 byte 10H Beginning address 1 word 0000H High byte low byte Number of registers 1 word 0001H High byte low byte CRC 1 word ADDRESS FUNCTION BEGINNING REGS BYTES DATA0 DATA1 DATA2 CRC 01H 10H 0000H 0003H 06H 10 00H 01 00H 00 00H E5ECH ADDRESS FUNCTION BEGINNING REGS CRC 01H 10H 0000...

Page 209: ...05 at 00 015 09 000 Intel Synchronization Motorola Synchronization FIELD LENGTH Relay address 1 byte 00H broadcast Function 1 byte 10H Beginning address 1 word 0000H High Byte low byte Number of registers 1 word 0004H High Byte low byte Number of bytes 1 byte 08H High Byte low byte Value of the registers Register 1 Command code Low byte High byte Register 2 4 Date and time CRC 1 word ADDRESS FUNCT...

Page 210: ...e a setting 1 Execute a selection command using the corresponding code See command execution 2 Change the setting 3 Execute a confirmation command using the corresponding code See command execution For Motorola format only the last two steps are necessary To modify a setting use function 10H PRESET MULTIPLE REGISTERS in MODBUS ...

Page 211: ...byte Function 1 byte 10H Beginning address 1 word High Byte low byte Number of registers 1 word High Byte low byte Number of bytes 1 byte Value of the registers Low byte high byte CRC 1 word FIELD LENGTH Relay address 1 byte Function 1 byte 10H Beginning address 1 word Number of registers 1 word CRC 1 word ADDRESS FUNCTION BEGINNING REGS BYTES DATA0 CRC 01H 10H 0000H 0001H 02H 0100H A7C0H ADDRESS ...

Page 212: ... ADDRESS FUNCTION BEGINNING REGS CRC 01H 10H 0128H 0008H 403BH ADDRESS FUNCTION BEGINNING REGS BYTES 01H 10H 0094H 0008H 10H DATA0 DATA1 DATA2 DATA3 DATA4 DATA5 DATA6 DATA7 CRC 5052H 5545H 4241H 2020H 2020H 2020H 2020H 2020H FA94H ADDRESS FUNCTION BEGINNING REGS CRC 01H 10H 0094H 0008 8023H ADDRESS FUNCTION BEGINNING REGS BYTES DATA0 DATA1 DATA2 CRC 01H 10H 0000H 0003H 06H 0200H 0100H 0000H E69EH ...

Page 213: ... error in the slave the following frame is received We can receive the following values in the error code field ADDRESS FUNCTION 80 H COD ERROR CRC 01H 90H 07H 0DC2H 01 ILLEGAL FUNCTION 02 ILLEGAL DATA ADDRESS 03 ILLEGAL DATA VALUE 04 SLAVE DEVICE FAILURE 05 ACK 06 SLAVE BUSY 07 NEGATIVE ACKNOWLEDGE 08 MEMORY PARITY ERROR ...

Page 214: ...rve 51G Curve 51G 2 ENUMERATION 0172 00B9 TD Mult 51G TD Mult 51G 4 FLOAT32 0176 00BB Def Time 51G Def Time 51G 4 FLOAT32 017A 00BD Pickup 50P1 Pickup 50P1 4 FLOAT32 017E 00BF Delay 50P1 Delay 50P1 4 FLOAT32 0182 00C1 Pickup 50P2 Pickup 50P2 4 FLOAT32 0186 00C3 Delay 50P2 Delay 50P2 4 FLOAT32 018A 00C5 Pickup 50G1 Pickup 50G1 4 FLOAT32 018E 00C7 Delay 50G1 Delay 50G1 4 FLOAT32 0192 00C9 Pickup 50G...

Page 215: ...8 0104 Pickup 49 Pickup 49 4 FLOAT32 020C 0106 Alarm Level 49 Alarm Level 49 4 FLOAT32 0210 0108 Heat Time 49 Heat Time 49 4 FLOAT32 0214 010A Cool Time 49 Cool Time 49 4 FLOAT32 0218 010C A Parameter A Parameter 4 FLOAT32 021C 010E B Parameter B Parameter 4 FLOAT32 0220 0110 P Parameter P Parameter 4 FLOAT32 0224 0112 Q Parameter Q Parameter 4 FLOAT32 0228 0114 K Parameter K Parameter 4 FLOAT32 0...

Page 216: ... 023E 011F 15 ENT 2 Fapr 2 BIT 0240 0120 1 ihca est INTE 2 BIT 0240 0120 2 ORD D STOC 2 BIT 0240 0120 4 ED 52B A CNT 2 BIT 0240 0120 5 ED 52A CLPs 2 BIT 0240 0120 6 C TAB C AJUS 2 BIT 0240 0120 7 Gosc SE2P 2 BIT 0240 0120 8 Fapr Adef 2 BIT 0240 0120 9 est INTE Function 2 BIT 0240 0120 10 STOC Function 2 BIT 0240 0120 11 A CNT AR Function 2 BIT 0240 0120 12 CLPs AR 50P1 Init 2 BIT 0240 0120 13 C AJ...

Page 217: ...R 50G2 Shot 3 2 BIT 0248 0124 6 AR 49 Shot 2 AR 49 Shot 3 2 BIT 024A 0125 0 AR 50P1 Shot 3 AR 50P1 Shot 4 2 BIT 024A 0125 1 AR 50G1 Shot 3 AR 50G1 Shot 4 2 BIT 024A 0125 2 AR 51P Shot 3 AR 51P Shot 4 2 BIT 024A 0125 3 AR 51G Shot 3 AR 51G Shot 4 2 BIT 024A 0125 4 AR 50P2 Shot 3 AR 50P2 Shot 4 2 BIT 024A 0125 5 AR 50G2 Shot 3 AR 50G2 Shot 4 2 BIT 024A 0125 6 AR 49 Shot 3 AR 49 Shot 4 2 BIT 024C 012...

Page 218: ... 2 BIT 0524 0292 10 c3 c3 2 BIT 0524 0292 11 c4 c4 2 BIT 0526 0293 0 a 50HA a 50HA 2 BIT 0526 0293 1 a 50HB a 50HB 2 BIT 0526 0293 2 a 50HC a 50HC 2 BIT 0526 0293 4 a 50LA a 50LA 2 BIT 0526 0293 5 a 50LB a 50LB 2 BIT 0526 0293 6 a 50LC a 50LC 2 BIT 0526 0293 8 a 51 A a 51 A 2 BIT 0526 0293 9 a 51 B a 51 B 2 BIT 0526 0293 10 a 51 C a 51 C 2 BIT 052C 0296 1 a 50NH a 50NH 2 BIT 052C 0296 3 a 51N a 51...

Page 219: ...DIS 50LA 2 BIT 0536 029B 5 DIS 50LB DIS 50LB 2 BIT 0536 029B 6 DIS 50LC DIS 50LC 2 BIT 0536 029B 8 DIS 51A DIS 51A 2 BIT 0536 029B 9 DIS 51B DIS 51B 2 BIT 0536 029B 10 DIS 51C DIS 51C 2 BIT 0538 029C 1 AR Enabled AR Enabled 2 BIT 0538 029C 2 AR Shot Cnt0 AR Shot Cnt0 2 BIT 0538 029C 3 AR Shot Cnt1 AR Shot Cnt1 2 BIT 0538 029C 4 AR Shot Cnt2 AR Shot Cnt2 2 BIT 0538 029C 5 AR Shot Cnt3 AR Shot Cnt3 ...

Page 220: ...ct 52a The circuit is continuously monitoring the voltage level The circuit below is designed to monitor the complete trip circuit It includes the tripping coil of the breaker and the trip circuit the wiring between the relays and the circuit breaker An alarm can be issued when the circuit is open The figure below shows the typical wiring diagram that will provide trip circuit monitoring while the...

Page 221: ...nitoring the trip circuit while the breaker is open and when it is closed a resistor must be added in parallel to the 52a contact as shown below VALUE OF RESISTOR R Supply Ohms Watts 48 Vdc 10 K 2 125 Vdc 25 K 5 250 Vdc 50 K 5 A9 A8 A10 TRIP A5 A6 INP 1 INP 2 COM TRIP COIL TRIP Breaker Auxiliary Contact 52a Vdc R ...

Page 222: ... SUPERVISION FOR MII FAMILY RELAYS D D 1 1 SETTINGS AND CONFIGURATION Settings and configuration related to this function are described below 1 Under I O CONFIGURATION Input 1 must be configured as General Input It will be used to monitor the permanent presence of voltage ...

Page 223: ... GEK 106237P D 1 TRIP CIRCUIT SUPERVISION FOR MII FAMILY RELAYS APPENDIXD D 2 Under LOGIC CONFIGURATION LOGIC 1 Invert Input 1 and set the timer to the time delay to produce the Trip Circuit Supervision Alarm for example 15 seconds ...

Page 224: ... RELAYS D 3 Under I O Configuration configure LEDs and outputs as required In this example LED 1 and configurable output 1 are configured to operate when a Trip Circuit failure is detected They are also configured to have memory so they will remain active even if the Trip Circuit failure disappears ...

Page 225: ...D 6 MIFII Digital Feeder Relay GEK 106237P D 1 TRIP CIRCUIT SUPERVISION FOR MII FAMILY RELAYS APPENDIXD D ...

Page 226: ...SETUP PRODUCT SETUP Relay Status Relay Operation Relay Operation DISABLE READY DISABLE NA Frequency Frequency Frequency 60 Hz 50 60 Hz NA ModBus Format ModBus Format Intel Intel Motorola NA Phase CT ratio Phase CT Ratio Phase CT Ratio 1 1 4000 1 Ground CT ratio Ground CT Ratio Ground CT Ratio 1 1 4000 1 HMI Password HMI Password 1 1 9999 1 Comm Password Comm Password 1 1 255 1 Slave Address Slave ...

Page 227: ... to measures and states is always available through both ports However if settings and switchgear menus are accessed by the frontal keyboard the relay will be in local mode and no changes could be made using both ports If we are not accessing the relay by the keyboard the frontal port has the priority this means that if we are trying to change something through the frontal port the rear port will ...

Page 228: ...more a protection device may support only a subset of the messages specified in this standard The IEC 60870 5 protocol is based on the three layer reference model Enhanced Performance Architecture EPA This physical layer uses a fibre optic or a copper wire based system that provides binary symmetric and memory less transmission The link layer consists of a number of link transmission procedures us...

Page 229: ... line The location and the values of the termination resistances used are not specified neither in the base standard nor in this companion standard For compatibility purposes the manufacturer shall state the units of load for each specific device The type of the cable used is not defined in the EIA RS 485 standard E 3 1 2 OPTICAL INTERFACE FIBRE OPTIC TRANSMISSION If a fibre optic transmission sys...

Page 230: ... system to map addresses by channel number A companion standard shall specify one frame format chosen from those offered in IEC 60870 5 1 The format chosen shall provide the required data integrity together with the maximum efficiency available for an acceptable level of convenience of implementation E 3 2 1 UNBALANCED TRANSMISSION The control system constitutes the master the protection equipment...

Page 231: ...it will be processed alternately As long as the protection equipment is not able to process a further command the DFC bit is set to 1 to prevent loss of information in the control direction This state may only be maintained for a maximum of 15 s During this time no further command shall be transmitted by the control system Such messages are answered by the protection equipment by means of a short ...

Page 232: ...shall normally be identical to the station address used at the link level Exceptions are only permitted where additional COMMON ADDRESSES OF ASDUs are required on the same physical link because of duplicated functions for example two over current protection functions within a transformer differential protection COMMON ADDRESS OF ASDU UI8 1 8 0 255 With 0 254 station address 255 global address Syst...

Page 233: ...ry input 2 29 Auxiliary input 3 30 Auxiliary input 4 INF SEMANTICS 32 Measurement supervision I 33 Measurement supervision V 35 Phase sequence supervision 36 Trip circuit supervision 37 I back up operation 38 VT fuse failure 39 Teleprotection disturbed 46 Group warning 47 Group alarm INF SEMANTICS X 48 Earth fault L1 X 49 Earth fault L2 X 50 Earth fault L3 51 Earth fault forward i e line 52 Earth ...

Page 234: ...system E X 90 Trip I X 91 Trip I X 92 Trip IN X 93 Trip IN INF SEMANTICS X 128 CB on by AR X 129 CB on by long time AR X 130 AR blocked X 140 AR shot counts Private sent by ASDU 4 and COT 1 Spontaneous INF SEMANTICS 144 Measurement I 145 Measurements I V 146 Measurements I V P Q X 147 Measurements IN VEN X 148 Measurements IL1 2 3 VL1 2 3 P Q f X 160 I2t breaker arcing counts Private sent by ASDU ...

Page 235: ... basic application functions These two functions are performed by coordination of particular application and link services that are described on detail Other basic application functions that may involve the utilization of polling procedures are then described without repeating details about this procedure 250 Write entry with execution 251 Write entry aborted INF SEMANTICS X 0 Initiation of genera...

Page 236: ...Measurement 1 2 2 4 Current L1 X Current L2 X Current L3 X Voltage L1 E Voltage L2 E Voltage L3 E Active Power P Reactive Power Q Frequency f Voltage L1 L2 ADSU MEANING X 1 Time tagged message X 2 Time tagged message with relative time X 3 Measurements I 4 Time tagged measurements with relative time X 5 Identification X 6 Time synchronization X 8 General interrogation termination X 9 Measurements ...

Page 237: ...N MIFII X 20 General command 21 Generic command 24 Order for disturbance data transmission 25 Acknowledgement for disturbance data transmission FUN INF DESCRIPTION GI ASDU COT 160 140 Reading of AR shot counts Autoreclosure indication 4 1 160 160 Measurement of I2t breaker arcing counter Measurement 4 2 ...

Page 238: ...eeder Relay F 1 APPENDIX F F 1 INTRODUCTION F APPENDIX F TIMING ACCURACY FOR 51 ELEMENTF 1INTRODUCTION The aim of this appendix is to explain the behavior of GE MII Family relay regarding the dependent time overcurrent protection ...

Page 239: ... error of 5 maximum permitted in all range for I Ipu 2 Care must be taken to use in the formula the current measured by the relay Figure F 1 MAXIMUM ERROR The lower limit means 1 5 times the pickup multiplied by a coefficient for the error For the upper limit Using a real case where the time dial is 0 45 for an injected current of 4 A and a pickup of 3 5 A the limits are as follows 1 5 13 1 pu I I...

Page 240: ...PENDIX F F 2 TIME OVERCURRENT ELEMENTS F Please take into account that the 5 error is in the Current Axis X Once the formula is used the error in the Time Axis Y will be a function of the Current and the Curve which in this case has a great slope ...

Page 241: ...he current error is below 3 as stated in the specifications and the timing error will depend on it according to the general formula Though the example is for a 3 phase relay the same is applicable to single phase ones PHASE A PHASE B PHASE C Theoretical Pickup A 3 675 3 675 3 675 Practical Pickup A 3 61 3 63 3 59 Estimated Current Error 1 77 1 22 2 31 Injected Current A 4 4 4 Measured Current A 3 ...

Page 242: ... the relay to trip The two criteria that may apply for the trip according to the IEC Standard are 1 Gs Gt 1 3 Gs Therefore there is a 30 tolerance In GE MIFII Relays this is the followed criterion with a 5 tolerance 2 Gt Gs Not really recommended in order to avoid undesired trips In relation to the timing accuracy for dependent time relays Section 4 3 2 page 13 the reference limiting error is defi...

Page 243: ...NDIXF F b An assigned error multiplied by stated factors within the effective range c In other cases the manufacturer shall state the reference Value of characteristic quantity as multiple of setting value GS 2 5 10 20 Limiting error as multiple of assigned error 2 5 1 5 1 1 ...

Page 244: ...fications and to the IEC Standard as well In the real case used for this report the specification would be the following range Lower time limit Time to trip Upper time limit 30 375 50 1 70 875 IEC Standard does not specify timing accuracy for pickup values lower than 2Gs therefore the manufacturer s specified accuracy must be applied ...

Page 245: ...F 8 MIFII Digital Feeder Relay GEK 106237P F 5 CONCLUSIONS APPENDIXF F ...

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