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GE Power Management

MDP Digital Time Overcurrent Relay

4-

1

GEK-100682D

4 INSTALLATION AND MAINTENANCE

4

4 INSTALLATION AND MAINTENANCE

4.1 INSTALLATION

The relay should be installed in a location that is clean and dry, free from excessive vibration, and well lighted
to facilitate inspection and testing. The relay should be mounted on a vertical surface. An outline and panel
drilling diagram is shown below. External connection schemes on the following pages.

Figure 4–1: OUTLINE AND PANEL DRILLING

Courtesy of NationalSwitchgear.com

Содержание MDP

Страница 1: ...100682D Copyright 2000 GE Power Management GE Power Management 215 Anderson Avenue Markham Ontario Canada L6E 1B3 Tel 905 294 6222 Fax 905 294 8512 Internet http www GEindustrial com pm Manufactured under an ISO9002 Registered system g GE Power Management Courtesy of NationalSwitchgear com ...

Страница 2: ...Courtesy of NationalSwitchgear com ...

Страница 3: ...rmation be desired or should particular problems arise which are not covered sufficiently for the pur chaser s purpose the matter should be referred to the General Electric Company To the extent required the products described herein meet applicable ANSI IEEE and NEMA standards but no such assurance is given with respect to local codes and ordinances because they vary greatly Courtesy of NationalS...

Страница 4: ...Courtesy of NationalSwitchgear com ...

Страница 5: ...GS 2 10 2 8 SETTINGS 2 11 a PICKUP TOC 2 11 b PICKUP IOC 2 11 c TIME DIAL 2 11 d CURVE SELECTION 2 11 e IOC DELAY 2 12 f COMMUNICATIONS ADDRESS 2 12 g OUTPUT CONTACT CONFIGURATION 2 12 2 9 DISPLAY AND RESET 2 13 2 10 SELF TEST AND ERROR ROUTINES 2 14 3 CONSTRUCTION 3 1 DESCRIPTION 3 1 3 2 DISPLAYS 3 3 3 3 RECEIVING HANDLING AND STORAGE 3 3 4 INSTALLATION AND MAINTENANCE 4 1 INSTALLATION 4 1 4 2 PE...

Страница 6: ... 7 i CLOSE BREAKER 6 7 6 6 LOCAL FUNCTIONS 6 8 6 7 SETUP 6 8 a COMMUNICATION PORT NUMBER 6 8 b DIAL TYPE 6 8 c MODEM CONNECTION TIME 6 8 d RELAY PARAMETERS 6 9 e ADD RELAY TO LIST 6 9 f DELETE RELAY FROM LIST 6 9 g DISPLAY MODE 6 10 h MEMORY AVAILABLE 6 10 6 8 HELP 6 10 6 9 EXITING MDP LINK 6 10 7 MODBUS PROTOCOL 7 1 DESCRIPTION 7 1 7 2 OVERVIEW 7 1 7 3 MODBUS COMMANDS 7 1 a READ HOLDING REGISTERS...

Страница 7: ...e The pickup value for the instantaneous unit can be adjusted between 1 and 31 times the value selected for the inverse time unit The instantaneous unit can be disabled by adjusting the setting to zero times the inverse value The MDP relay has two trip output relays that can be selected to indicate whether a trip has been produced by an instantaneous unit or an inverse unit or by phase or ground T...

Страница 8: ...ase 2 5 A nominal 1 5 to 13 125 A ground 1 5 to 13 125 A phase 3 5 A nominal 0 1 to 0 875 A ground 1 5 to 13 125 A phase 4 1 A nominal 0 1 to 0 875 A ground 0 3 to 2 625 A phase 5 1 A nominal 0 3 to 2 625 A ground 0 3 to 2 625 A phase 6 1 A nominal 0 05 to 0 4375 A ground 0 3 to 2 625 A phase 7 5 A nominal 0 5 to 4 375 A ground and phase 1 24 to 48 V DC 2 48 to 125 V DC 35 to 120 V AC 3 110 to 250...

Страница 9: ...1G 1G 2 2 20 POWER SUPPLY 3 3 4 4 5 5 6 6 7 7 8 8 13 12 11 T T 52a 52a TRIP COIL ALTERNATIVE CT WIRING FOR RESIDUAL GROUND SENSING ZERO SEQUENCE GROUND SENSING CONNECTION A B C CONTROL POWER CIRCUIT BREAKER CURRENT INPUTS CURRENT INPUTS SHIELDED TWISTED PAIR RS232 707754A3 CDR 14 15 16 17 18 GE Power Management CP7 CP4 CP8 CP5 CP6 TX RX COM CP1 CP3 CP2 9 19 Courtesy of NationalSwitchgear com ...

Страница 10: ...aracteristic is best suited to such applications because it more nearly approxi mates typical power fuse and fuse cutout characteristics The general practice for grounded distribution system protection is to use three phase overcurrent functions for protection against interphase faults and a ground residual overcurrent function for single phase to ground faults The use of a separate ground overcur...

Страница 11: ...s fault conditions The MDP generates a new fault report when the fault current drops below the pick up value and a new fault occurs Contact converter input CC1 and the output select switch of the MDP allow a zone selective interlocking of the MDP relays This scheme provides instantaneous operation with a minimum time delay of the upstream relay for faults between the upstream and downstream relays...

Страница 12: ...Value 1 Operating Time 2 or 0 025 seconds whichever is greater DIGITAL INPUT Voltage Range 38 5 to 250 V AC 24 to 250 V DC Frequency Range 40 to 70 Hz OUTPUT AND TRIP CONTACTS Closing Contact will close and conduct up to a maximum of 30 A for tripping duty at control voltages up to 300 V DC The output contact is also rated for Capacitive trip devices Interrupting 50 W resistive with a maximum of 2...

Страница 13: ...e same relay INSTANTANEOUS UNIT PICKUP Independent for phase and ground 1 to 31 times the pickup of the TOC setting A setting of zero 0 disables instantaneous unit X no multiples selected INSTANTANEOUS UNIT TIME DELAY Independent for phase and ground 0 to 1 55 seconds in 50 millisecond steps PHASE OPERATING CURVES CURVE SELECTION Available Curves Inverse BS142 for 1 A models Long Time Inverse Very...

Страница 14: ...1 8 MDP Digital Time Overcurrent Relay GE Power Management 1 INTRODUCTION GEK 100682D 1 Courtesy of NationalSwitchgear com ...

Страница 15: ...y installation of various communications inter face modules The procedure for installation replacement of a communications upgrade card is provided below 1 To install or replace a communications upgrade card begin by removing the relay from the case 2 Before continuing connect an approved wrist grounding strap to ground This discharges any static elec tricity in your body that could damage the ele...

Страница 16: ...ARD 7 Reassemble the MDP relay by engaging the board spacers of the lowest board digital input communica tions board into the processor board above it Align the NOMEX shield on the solder side of the settings board Take one screw and spacer at a time and push the screw through the nameplate spacer settings board and NOMEX The NOMEX protects the ribbon cable from the leads on the settings board Fig...

Страница 17: ...taken This average is converted to a multiple of pickup TOC the format used by the relay This value is displayed in 5 second intervals 2 5 INVERSE TIME UNIT The multiple of pickup TOC measurement obtained is compared independently for each phase and ground with a value the pickup setting that corresponds to one times 1 pickup TOC If the measurement exceeds the fixed setting a Pickup LED lights on ...

Страница 18: ...ERSE TIME CURVE on page 2 8 e 66 INVERSE LONG TIME For 1 1 to 3 times the pickup TOC For 3 to 5 times the pickup TOC For 5 to 20 times the pickup TOC For 20 to 31 times the pickup TOC See Figure 2 5 LONG INVERSE TIME CURVE on page 2 6 For all the above equations T time in seconds P multiple of pickup TOC Time Dial for 5 A rated unit Time Dial Setting for 1 A rated unit T 0 0059 P 0 001 1 0 419 Tim...

Страница 19: ...GE Power Management MDP Digital Time Overcurrent Relay 2 5 GEK 100682D 2 OPERATING PRINCIPLES 2 Figure 2 4 INVERSE TIME CURVE Courtesy of NationalSwitchgear com ...

Страница 20: ...2 6 MDP Digital Time Overcurrent Relay GE Power Management 2 OPERATING PRINCIPLES GEK 100682D 2 Figure 2 5 LONG INVERSE TIME CURVE Courtesy of NationalSwitchgear com ...

Страница 21: ...GE Power Management MDP Digital Time Overcurrent Relay 2 7 GEK 100682D 2 OPERATING PRINCIPLES 2 Figure 2 6 VERY INVERSE TIME CURVE Courtesy of NationalSwitchgear com ...

Страница 22: ...2 8 MDP Digital Time Overcurrent Relay GE Power Management 2 OPERATING PRINCIPLES GEK 100682D 2 Figure 2 7 EXTREMELY INVERSE TIME CURVE Courtesy of NationalSwitchgear com ...

Страница 23: ...GE Power Management MDP Digital Time Overcurrent Relay 2 9 GEK 100682D 2 OPERATING PRINCIPLES 2 Figure 2 8 BS142 INVERSE TIME CURVE 1 A MODELS ONLY Courtesy of NationalSwitchgear com ...

Страница 24: ...ngs can be changed by DIP switches on the front of the relay Once the desired changes are made the relay has to be initialized Initialization is accomplished by depressing the reset lever for three seconds until the Ready LED goes out Any time a dip switch is changed the Ready LED begins to flash twice per second If the settings are returned to their previous positions or if the relay is initializ...

Страница 25: ...ion switches The settings are as follows The time delay of the definite time curve is the range times the time dial for 1 A relays and the range times the time dial divided by 10 for 5 A relays For example to obtain a 3 second operating time the time dial would be set first third and fourth switches to the right and second and fifth switches to the left that is The 6 second curve would be chosen w...

Страница 26: ...VIEW SHOWING COMMUNICATION ADDRESS SWITCHES on page 2 3 for the location of the communication address switches All MDP relays with the RS232 or RS485 protocol will respond to address 001 g OUTPUT CONTACT CONFIGURATION The MDP relay has two output contacts that can be configured by means of the output selection switch allow ing the user to distinguish either between phase and ground or between time...

Страница 27: ...ent multiples at the last trip F9 Operating time for the last trip Last trip data F5 to F9 is retained provided auxiliary power is maintained The two digit display can show a maximum operating time of 99 seconds When the time exceeds 99 seconds the MDP begins again from zero 0 with both decimal points lit to indicate the initial 100 units If the time exceeds 199 seconds the display shows 99 with b...

Страница 28: ...power is removed and the relay reenergized Locally the Ready LED goes out and the state of the relay is indi cated by an 80 on the display flashing once per second The first thing the MDP relay does when powered is to perform a complete check of the EPROM If any error is detected a Fatal Error output is given Once in operation partial EPROM checks are made If any one of these checks gives an error...

Страница 29: ...tached to the front of the case and includes two interlocking arms that prevent the cover from being restored until the connection plugs have been inserted Figure 3 1 REMOVABLE CONNECTION PLUG The case is suitable for semi flush mounting on panels Hardware is available for all panel thicknesses up to two inches 2 A panel thickness of 1 8 inch will be assumed unless otherwise specified on the order...

Страница 30: ...3 2 MDP Digital Time Overcurrent Relay GE Power Management 3 CONSTRUCTION GEK 100682D 3 Figure 3 2 INTERNAL CONNECTIONS DIAGRAM Courtesy of NationalSwitchgear com ...

Страница 31: ...ING HANDLING AND STORAGE This relay contains electronic components that could be damaged by electrostatic discharge currents if those currents flow through certain terminals of the components The main source of electrostatic discharge currents is the human body and the conditions of low humidity carpeted floors and isolating shoes are conducive to the generation of electrostatic discharge currents...

Страница 32: ...3 4 MDP Digital Time Overcurrent Relay GE Power Management 3 CONSTRUCTION GEK 100682D 3 Courtesy of NationalSwitchgear com ...

Страница 33: ...hould be installed in a location that is clean and dry free from excessive vibration and well lighted to facilitate inspection and testing The relay should be mounted on a vertical surface An outline and panel drilling diagram is shown below External connection schemes on the following pages Figure 4 1 OUTLINE AND PANEL DRILLING Courtesy of NationalSwitchgear com ...

Страница 34: ...4 2 MDP Digital Time Overcurrent Relay GE Power Management 4 INSTALLATION AND MAINTENANCE GEK 100682D 4 Figure 4 2 TYPICAL EXTERNAL CONNECTIONS GROUND CURRENTS Courtesy of NationalSwitchgear com ...

Страница 35: ...GE Power Management MDP Digital Time Overcurrent Relay 4 3 GEK 100682D 4 INSTALLATION AND MAINTENANCE 4 Figure 4 3 TYPICAL EXTERNAL CONNECTIONS RESIDUAL CURRENTS Courtesy of NationalSwitchgear com ...

Страница 36: ... 4 MDP Digital Time Overcurrent Relay GE Power Management 4 INSTALLATION AND MAINTENANCE GEK 100682D 4 Figure 4 4 TYPICAL EXTERNAL CONNECTIONS ZONE SELECTIVE INTERLOCK Courtesy of NationalSwitchgear com ...

Страница 37: ...of relays in the operation of a power system it is important that a periodic test program be followed It is recognized that the interval between periodic checks will vary depending upon environment type of relay and the user s experience with periodic testing See Chapter 5 PERIODIC ACCEPTANCE TESTS for periodic testing using your settings Courtesy of NationalSwitchgear com ...

Страница 38: ...4 6 MDP Digital Time Overcurrent Relay GE Power Management 4 INSTALLATION AND MAINTENANCE GEK 100682D 4 Courtesy of NationalSwitchgear com ...

Страница 39: ... and rating of the relay agree with the req uisition Remove the relay from its case and check that there are no broken or cracked molded parts or other signs of physical damage and that all screws are tight 5 3 INVERSE TIME UNIT a PHASE PICKUP CALIBRATION VERIFICATION 1 Set the switch on the front of the relay so the output relays correspond to phase or ground Position B 2 Connect the relay as ind...

Страница 40: ... and verify that with an input current of five times 5x pickup TOC the operating time is between the margins shown in the tables below Table 5 1 INVERSE CHARACTERISTIC OPERATING TIMES TIMES PICKUP TOC OPERATING TIMES in seconds INVERSE ANSI INVERSE BS142 VERY INVERSE LONG TIME INVERSE EXTREMELY INVERSE 2 4 28 to 4 73 0 49 to 0 55 8 03 to 8 87 44 8 to 49 5 8 24 to 9 11 5 1 93 to 2 13 0 21 to 0 25 1...

Страница 41: ...s when the current is between 95 and 105 of the pickup TOC setting 5 With the trip output contact closed lower the applied current verifying that the trip relay resets and that the Pickup LED turns off at a current value equal to or greater than 95 of the pickup value b VERIFICATION OF OPERATING TIME 1 With the relay still connected as in Figure 5 1 TEST CONNECTIONS on page 5 1 apply a current of ...

Страница 42: ...5 4 MDP Digital Time Overcurrent Relay GE Power Management 5 PERIODIC ACCEPTANCE TESTS GEK 100682D 5 Courtesy of NationalSwitchgear com ...

Страница 43: ...k the MDP model number as shown MDP4xxxxxxDA RS232 MDP5xxxxxxDA RS485 x don t care 6 2 SYSTEM REQUIREMENTS a HARDWARE The minimum PC hardware requirements consists of the following components An IBM AT or compatible Compaq Dell HP etc with one parallel port a minimum of 500 KB of free memory RAM to run the program in 40 MB hard drive low density 3 1 2 inch floppy drive and VGA monitor See Figure 6...

Страница 44: ...6 2 MDP Digital Time Overcurrent Relay GE Power Management 6 MDP LINK SOFTWARE GEK 100682D 6 Figure 6 2 RS485 CABLE CONNECTION Courtesy of NationalSwitchgear com ...

Страница 45: ...ng the highlighted key Using a hot key will activate the associated menu or dialog box If there is no hot key for a desired menu item use the UP and DOWN arrow keys to highlight the desired item then press the ENTER key Pressing the ENTER key will activate the associated menu or dialog box d DIALOG BOXES Dialog boxes are generally characterized by a title bar a grey box and OK and CANCEL buttons T...

Страница 46: ...cted it will be highlighted To operate the scrolling of the list box with the keyboard use the PAGE UP DOWN keys to move the contents of the list box a section at a time and the UP DOWN arrow keys to move the contents one line at a time Hold ing down the keys will cause the movement in the list box to repeat until the key is released Use the UP DOWN arrow keys to select the desired item The select...

Страница 47: ...phone number baud rate and mul tiplexor switch code for each MDP system The NEW RELAY button in the dialog box allows the user to add a relay that has not been previously entered into the list of configured relays The user enters the unit description the phone number the multiplexor switch code the baud rate the parity and the stop bits for the new relay The new relay is added to the list of confi...

Страница 48: ...int and or file the data for the last fault To select this menu item either click on it with the left mouse button or use the ALT F hot key Once this item is selected a dialog box will appear with three independent choices for displaying printing and filing the fault values To change any of the three choices either click on it with the left mouse button or use the TAB key to highlight one of the s...

Страница 49: ...ce the box has been selected enter the filename followed by the ENTER key After all the choices have been made click on the OK button or use the ALT O hot key to retrieve the breaker status from the relay Selecting the CANCEL button will return to the Relay functions menu without any further action To clear the breaker status from the screen after it has been displayed either click on the small bo...

Страница 50: ...y to move between the port and IRQ fields and the buttons or click on the desired field with the left mouse button Once a field has been selected use the editing keys to change and or enter data When the port and IRQ num bers are correct select the OK button to save the numbers If the CANCEL button is selected the Setup menu will be redisplayed without any further action b DIAL TYPE To select this...

Страница 51: ...dem for the unit being described To enter or change the switch code select it by clicking on it with the left mouse button or use the TAB key to move the cursor to the switch code box The normal text editing keys may be used to enter or modify the phone number This is an optional item and should only be filled in if a code operated switch is being used The baud rate must be set at 2400 baud A choi...

Страница 52: ... mode can be selected and once a mode is selected the other mode is automatically deselected Once the correct mode has been selected click OK press the ALT O hot key To exit this dialog box without any further action click on CANCEL with the left mouse button or use the ALT C hot key h MEMORY AVAILABLE To display the amount of available memory while MDP LINK is running either click on this menu it...

Страница 53: ...s is read by the Modbus interface module using the serial protocol The baud rate for serial communication is internally fixed at 2400 baud and is not configurable by the user The Modbus card can be configured externally for the following baud rates 1200 2400 9600 and 19200 baud The Modbus interface module provides the protocol conversions required to allow full operability on a Power Leader networ...

Страница 54: ...ow order bits Data is scanned in the MDP at a rate of 125 registers per scan In response to this command from Host the module will send back the latest actual value data stored in the MDP these values will be periodically read by the module from the MDP relay c FORCE SINGLE COIL FUNCTION CODE 05 Modbus description Forces a single coil OX reference to either ON or OFF When broadcast the function fo...

Страница 55: ...h 0010 MDP Software Revision 0 00 to 99 99 RO 4 digit BCD with decimal between 2nd and 3rd digits 2 80 01 02 03h DYNAMIC VALUE INPUT REGISTERS 1000 Number of pending events 0 to 24 RO Integer 1 1001 LED Status 0000h to 00FFh RO A bit set to 1 indicates the correspond ing LED is ON b0 Ready b1 Phase A b2 Phase B b3 Phase C b4 Ground b5 TOC Trip b6 IOC Trip b7 Pickup 1 80 74 00h 1002 Hardware Status...

Страница 56: ...N A 1501 Total Communication errors N A RO Unsigned Integer 1 N A 1502 CRC Errors N A RO Unsigned Integer 1 N A 1503 Transmit Failures N A RO Unsigned Integer 1 N A 1504 Receive Time out N A RO Unsigned Integer 1 N A 1505 Receive Errors N A RO Unsigned Integer 1 N A EVENT REGISTERS 2000 Event Code EVENT 1 0 to 256 RO Unsigned Integer 1 2001 Hour 0 to 23 hrs RO Unsigned Integer 1 2002 Minute 0 to 5...

Страница 57: ...RW Integer 1 N A 3003 Password N A RW Integer 1 N A 3004 Phase Curve Selection 00 to 04h RO Unsigned Integer 00h Not used 01h Long Time Inverse 02h Very Inverse 03h Extremely Inverse 04h Inverse 1 80 73 00h 3005 Phase Definite Time sec RO Float set to 0 if not used 2 80 73 00h 3007 Ground Curve Selection 00 to 04h RO Unsigned Integer 00h Not used 0lh Long Time Inverse 02h Very Inverse 03h Extremel...

Страница 58: ...s registers are shifted to represent remaining events to be read by host The host may read event registers starting at any event register set boundary Events registers following the event that was read will be shifted up Events registers before the registers that are read will not be affected Host requests to read event registers partially e g only Event Code register will be returned with an exce...

Страница 59: ... than an event caused by the programmer 4 07 Real energy cleared 8 08 Reactive energy cleared 8 09 NVM failure 80 56 8 10 ROM failure 80 56 8 11 RAM failure 80 56 8 12 A D converter failure 80 56 8 13 All voltages are OK 80 50 8 14 Phase A N voltage lost 80 50 8 15 Phase B N voltage lost 80 50 8 73 Breaker status change 4 74 EPROM checksum test failure 4 75 Interface module not ready 4 76 Communic...

Страница 60: ...7 8 MDP Digital Time Overcurrent Relay GE Power Management 7 MODBUS PROTOCOL GEK 100682D 7 Courtesy of NationalSwitchgear com ...

Страница 61: ...nto the funda mental Do I have breaker status and how to I connect the 52b wire 1 To check if you have breaker status examine the model number shown on the faceplate If the model number is MDP0 then the relay does not have communications or breaker status 2 If the model number is anything other than MDP0 then the MDP has breaker status 3 To use breaker status connect the two terminals from the bre...

Страница 62: ... CURVE the TIME DIAL above CURVE on the faceplate is used as a multiple of the definite time The equation for computing the definite time is For example to set a definite time of 3 2 seconds 1 Move the three switches under CURVE to the left indicating the 8 second DT 2 Compute the equation and solve for x 3 Under TIME DIAL move the first second and third switches to the right to add to 4 seconds 4...

Страница 63: ...ower Management contact information on title page Title Added ISO 9000 registration seal 4 Figure 1 1 SINGLE LINE DIAGRAM 5 Added phase current ranges to ORDER CODES NOMENCLATURE table 5 Figure 1 2 TYPICAL WIRING DIAGRAM 7 Added the following text to the SPECIFICATIONS DIGITAL INPUT Voltage Range 38 5 to 250 V AC 24 to 250 V DC Frequency Range 40 to 70 Hz 12 Added the following warning DO NOT CHAN...

Страница 64: ...110 250 VDC 88 285 VDC 85 240 AC 24 to 48 V DC 48 to 125 V DC 35 to 120 V AC 110 to 250 V DC 85 to 240 V AC 6 Modified Nominal Frequency 25 50 60 Hz Nominal Frequency 25 to 70 Hz 17 Corrected In headings for Table 5 INVERSE TIME column 3 Long Time Very Inverse column 4 Extremely Inverse column 5 Inverse Table 5 1 INVERSE OPERATING TIMES column 3 Very Inverse column 4 Long Time Inverse column 5 Ext...

Страница 65: ...TRUCTION 3 1 CURRENT RANGES 1 1 CURVE SELECTION 2 11 D DEFINITE TIME A 2 DIGITAL INPUT BOARD 2 2 DISPLAY 2 13 DISPLAYS 3 3 E ERROR ROUTINES 2 14 EVENT CODES 7 7 EVENT HANDLING 7 6 EXTERNAL CONNECTIONS ground current 4 2 residual current 4 3 zone selective interlock 4 4 EXTERNAL INPUTS 2 1 EXTREMELY INVERSE CURVES curves 2 8 description 2 4 F FAQ A 1 FLASHING READY LIGHT A 2 FORCE SINGLE COIL 7 2 F...

Страница 66: ...ICKUP IOC 2 11 PICKUP TOC 2 11 PICKUP VERIFICATION 5 3 PORTS 2 1 PRODUCT DESCRIPTION 1 1 R RANGES 1 7 READ HOLDING REGISTERS 7 1 READ INPUT REGISTERS 7 2 REAR VIEW 2 3 RECEIVING 3 3 REMOVABLE CONNECTION PLUG 3 1 RESET 2 13 RESIDUAL CURRENT CONNECTIONS 4 3 REVISION HISTORY B 1 RMS A 1 ROUTINE MAINTENANCE 4 5 RS232 CABLE CONNECTION 6 1 RS485 CABLE CONNECTION 6 2 S SELF TEST 2 14 SETTINGS 1 7 2 11 ch...

Страница 67: ...tion charges prepaid to an authorized service centre or the factory Repairs or replacement under warranty will be made without charge Warranty shall not apply to any relay which has been subject to mis use negligence accident incorrect installation or use not in accor dance with instructions nor any unit that has been altered outside a GE Power Management authorized factory outlet GE Power Managem...

Страница 68: ...t Selector Guide A graphical tool for finding the product you are inter ested in Sales Offices A complete listing of world wide sales offices Technical Support Complete contact information is available Instruction Manuals Manuals for many products are now available online GE Product Software The latest working versions of product software Technical Drawings Many technical drawings are available in...

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