GE GEH-6294 User Manual Download

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Courtesy of NationalSwitchgear.com

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Summary of Contents for GEH-6294

Page 1: ...ts representing the latest technological advancement in GE trip systems MicroVersaTrip Plus and MicroVersaTrip PM Conversion Kits are designed and breaker tested to conform with ANSI Stan dard C37 59 allowing the retrofltter to properly install and acceptance test the breaker This publication covers installa tion of MicroVersaTrip Plus and PM Conversion Kits on I T E Type K 225 K 600 K 800 K 1600 ...

Page 2: ...KIT Phase Sensors CT s I T E 225 800 Amperes I T E 1600 2000 Amperes Installing the Flux Shifter Mounting the Programmer Bracket Programmer Wiring Harness Communications Wiring Harness Programmable Trip Unit SECTION 4 7 16 7 10 7 8 9 10 11 12 13 14 14 15 16 SECTION 5 FOUR WIRE GROUND FAULT OPTION 17 18 SECTION 6 TESTING AND TROUBLESHOOTING Cabling Diagram 19 21 21 9 Courtesy of NationalSwitchgear ...

Page 3: ...o attempting any installation maintenance or modification Follow all lockout and tagging rules of the National Electrical Code and all other appli cable codes Do not work on a closed breaker or a breaker with the closing springs charged Trip OPEN the breaker and be sure the stored energy springs are discharged avoiding the possibility that the breakers may trip OPEN or the charg ing springs discha...

Page 4: ...trip units are contained in a common insulated housing Fig 1 To re move these units unscrew the 5 Philip s head screws at the back of the breaker holding the housing in place Save the hardware NOTE On some I T E breakers the load side draw out fingers must also be removed ARM SCREWS Step 2 Remove and discard the 2 Philip s head screws per phase above the copper load terminals hold ing the trip uni...

Page 5: ...anical trip unit is contained in its own insulated housing Step 1 On draw out breakers with electrical operators remove the draw out contact block assembly by removing the 4 screws holding it to the back frame Fig 5 Save the hardware Step 2 Remove the 2 top and 2 bottom Philip s head screws at the breaker back holding the insulated trip unit housing to the breaker frame Fig 6 Save the hardware Fig...

Page 6: ...ach trip unit in its housing Fig 8 Step 5 Remove and save the 2 Philip s head screws at the back and under the load terminals of each trip unit housing holding the copper terminal extensions in the insulated housing Step 6 Remove and discard the hardware holding each copper load terminal to the metal mounting brackets Separate each trip unit from its housing Discard the trip units and save the ins...

Page 7: ...lt saved in step 5 page 5 Fig 10 Step 2 Place each CT one at a time on the phase bus post over the spacer Place an insulated barrier over the end of the bus post and mount the as sembly to the load terminal Fig 11 Insert the 16 x 1 bolt with a lock and flat washer and tighten finger tight Fig 12 NEW C LEAD TERMINAL Fig 10 Copper Load Terminal Installed K 800 600 225 BUS POST BUS BOLT INSULATED BAR...

Page 8: ...arms Refer to step 2 page 4 Tighten them finger tight for now Step 4 Torque the bolts inserted in step 2 to 200 in lbs Fig 14 Step 5 Torque the 2 screws in each phase connecting the load terminals to the contact arms to 100 in lbs The screws were inserted in step 3 Fig 13 Installed CT Assemblies IMPORTANT NOTE Steps designated by an are critical electrical integrity connec tions They must be corre...

Page 9: ...erminal Assembly K 2000 1600 NOTE The K 2000 breaker uses l 5 ir 18 x 1 5 bolt Fig 15 Step 3 Insert the 2 10 32 x 1V screws with a plain and lock washer and nut provided through the insu lated housing Step 4 Assemble the copper CT post spacer CT and in sulated barrier provided onto each insulated housing Fig 16 Insert the 4 13 x Wi bolt with a plain and lock washer provided into the CT post Tighte...

Page 10: ...in step 3 to 300 in lbs Step 8 Torque the contact arm screws above each load terminal to 100 in lbs Fig 17 C Shaped Barrier Modification TOP HOUSINGS SCREWS Ji NOTE Ocassionally during current sensor manufacturing a slight separation occurs of the epoxy from the plastic shell This may amount to as much as 0 030 and has no effect on performance Additionally slight surface imperfections are part of ...

Page 11: ... hole in the frame where the mounting bolt was removed Fig 19 Reinsert the mounting bolt through the hole in the frame Then insert the 14 20 x A bolt and lock washer pro vided through the hole above the mounting bolt Step 3 Make sure the reset arm linkage is on the inside of the crossbar arm Line up the hole in the reset arm with the hole in the crossbar Fig 20 Insert the 14 x 14 pin provided thro...

Page 12: ...diam eter rod or drill not provided The best ap proach is to adjust the breaker in the open posi tion then check it in the closed position Make sure the trip paddle play is eliminated by gently pushing on the paddle while adjusting the screw Fig 21 1 RIP PADDL IMPORTANT NOTE Extreme caution must be used when working on a closed breaker DO NOT reach your hands into the mecha nism while adjusting th...

Page 13: ...the front of the top cover Fig 24 ADAPTER BRACKET o STEP 1 PUSH BRACKET OVER NOTCHES IN END OF PLUG BODY urn A STEP 5 HOLD PLUG BODY TIGHT TO THE ADAPTER BRACKET AND BEND OVER 2 LOCKING TABS STEP 3 PRESS ON PUSH NUTS UNTIL BRACKET IS HELD FIRMLY AGAINST PROGRAMMER BRACKET O i 3 CAUTION Adapter bracket must be installed onto harness plug as shown in Fig 22 Failure to do so will result in harness pl...

Page 14: ...sists of the mating of the 36 pin programmer connector and the as sociated wires Step 1 Connect the wire harness leads to the screw ter minals on each CT Make sure they are properly connected The white wire must be connected to the terminal marked white Step 2 Use the wire ties provided to tie the harness back against the frame The harness should be tied to the holes in the fiber barrier at each C...

Page 15: ...ns harness can be re moved or coiled and tied to the breaker frame When the communications harness is installed it should be tied to the frame in an accessible loca tion in the switchgear Fig 27 shows a suggested location However actual location of the commu nications disconnect plug will dictate routing of the harness It is dependent on the configuration of the equipment and may be determined by ...

Page 16: ...ed to the programmer frame and secures the programmer to the mounting bracket TO INSTALL THE PROGRAMMER Step 1 Insert the guide pins into the hole and push on the programmer This will engage the connectors and release the locking lever which will move up wards Fig 28 Step 2 Verify that the locking lever actually engaged the programmer pin To remove the programmer pull the locking lever out releasi...

Page 17: ... The neutral sensor is installed in the neutral bus in the equip ment and is connected to the programmable trip unit through the communications wiring harness provided Step 1 Mount the neutral sensor in the outgoing neutral lead normally in the equipment s bus or cable compartment Fig 30 and 31 Step 2 Connect the neutral sensor wire harness to the correct taps on the sensor The top setting on the ...

Page 18: ... MAX STRAP 1 25 MAX STRAP 3 33 ref 1 25 r If i 1 S i i h V I I 625 I 625 i i i 1 18 ref TERMINAL BLOCK 1 75 88 1 75 i 6 00 i 75 i ei t I EI 3 75 MAX m 1 75 3 25 re i 9 I i ei 11 25 Fig 31 Neutral Sensor Outline for K 800 1600 2000 18 Courtesy of NationalSwitchgear com ...

Page 19: ...E test kit Cat No TVTS1 or TVRMS on this programmer Troubleshooting When malfunctioning is suspected first examine the circuit breaker and its power system for ab normal conditions such as 1 Breaker not tripping in proper response to overcurrents or incipient ground faults 2 Breaker remaining in a trip free state due to mechanical interference along its trip shaft 3 Inadvertent shunt trip activati...

Page 20: ... the breaker mounted neutral secondary disconnect block through to the female har ness connector If the breaker s lower studs connect to the supply source then the neutral sensor must have its load end connected to the source See Fig 32 Make sure that the neutral conductor is carrv ing only that neutral current associated with the breaker s load current neutral not shared with other loads 225A 14 ...

Page 21: ... litULU CONNECTIONS FOR GROUND FAULT OPTION ONLY R W H E COMM NET I D T 24Vdc POWER E _ _ J r 0 FLUX SHIFT CONNECTIONS FOR IC TO TRIP DEVICE COMMUNICATIONS j OPTION ONLY r m I 4 WlRf LOAD B 0 0 A IA 0 J 6 6 BREAKER BACK FRAME NEUTRAL SENSOR DISCONNECT LEFT POLE CURRENT SENSOR 0 0 NEUTRAL LOAD LINE O EQUIPMENT MOUNTED NEUTRAL SENSOR Figure 32 Cabling Diagram MicroVersaTrip Plus and PM with Ground F...

Page 22: ...NOTES r i T i 22 Courtesy of NationalSwitchgear com ...

Page 23: ...NOTES 1 v r 23 Courtesy of NationalSwitchgear com ...

Page 24: ...n or maintenance Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser s purposes the matter should be referred to the GE Company X _ GE Electrical Distribution Control General Electric Company 41 Woodford Ave Plainville CT 06062 1994 General Electric Company GEH 6294 1194 PSA Courtesy of NationalSwitchgear com ...

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