GE AK-1-50 Installation Instructions Manual Download Page 4 | Manualshive

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Courtesy of NationalSwitchgear.com

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Summary of Contents for AK-1-50

Page 1: ...ts representing the latest techno logical advancement in GE trip systems MicroVersaTrip Plus and MicroVersaTrip PM Conversion Kits are des igned and breaker tested to conform with ANSI Standard C37 59 allowing the retrofitter to properly install and acceptance test the breaker This publication covers installa tion of MicroVersaTrip Plus and PM Conversion Kits on GE Types AK 1 50 Low Voltage Power ...

Page 2: ...sors CT s 5 5 5 6 SECTION 5 FRONT FRAME BREAKER CONVERSION Flux Shifter Installation Programmer Mounting Bracket Installation Trip Paddle Installation 7 7 8 9 SECTION 6 BREAKER ASSEMBLY Frame Assembly Wire Harness Installation Flux Shifter Adjustment Programmable Trip Unit Installation 10 10 10 11 11 SECTION 7 FOUR WIRE GROUND FAULT OPTION Installing the Neutral Sensor 12 12 13 15 SECTION 8 TESTIN...

Page 3: ... breaker prior to attempting any installation maintenance or modification Follow all lockout and tagging rules of the National Electrical Code and all other applicable 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...

Page 4: ...lled Fig 1 Step 2 Remove the crossbar mechanism pin by first re moving the external retaining clip Fig 2 Save the pin and clip Step 3 Remove and save the 4 or 6 nuts and lock washers holding the front and back frames to gether Fig 3 shows an example of one of the nuts Four nuts are used on manually operated breakers and six on electrically operated breakers Step 4 OPENING SPRINGS Fig 1 AK 1 50 Cir...

Page 5: ...Fig 5 Installing the Phase Sensors CT s Step 1 Mount the new copper CT post to the back frame using the 2 16 x llA bolts with plain and lock washers provided Fig 6 ALLEN I 1LAI BOLLS PHILLIPS HEM SCREW BRACKET Fig 4 EC Trip Device Removal NOTE Occasionally during current sensor manufacturing a slight separation may occur between the epoxy and plastic shell This may amount to as much as 0 030 and h...

Page 6: ... with a plain and lock washer provided Fig 8 Step 5 Insert the 2 16 x 114 bolts with plain and lock washers provided through the top copper bus into the contact arm assembly Fig 8 Step 6 Tighten the 16 bolts to 200 in lbs and the 54 13 bolts to 300 in lbs Fig 9 14 20 SCREW WIRE FASTENERS Fig 7 Wire Fastener Installation IMPORTANT NOTE Steps designated by an are critical electrical integrity connec...

Page 7: ...t frame Remove and discard the grounding strap hardware and use the 2 16 x 1 bolts nuts and lock washers pro vided Fig 11 Step 3 Bolt the flux shifter assembly to the bracket using the 2 4 20 x V2 bolts and lock washers provided Fig 12 TRIP PADDLES Fig 10 Trip Paddle Removal FLUX SHIFTER BRACKET X 16 BOLTS Fig 11 Flux Shift Mounting Bracket 20 BOLTS FLUX SHIFTER Fig 12 Flux Shifter Installation Co...

Page 8: ...STEP 5 HOLD PLUG BODY TIGHT TO THE ADAPTER BRACKET AND BEND OVER 2 LOCKING TABS CAUTION Adapter bracket must be installed onto harness plug as shown in Fig 13 Failure to do so will result in harness plug failure and the programmer will not provide protection STEP 3 PRESS ON PUSH NUTS UNTIL BRACKET IS HELD FIRMLY AGAINST PROGRAMMER BRACKET O OJD A o o o o o o o o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o o...

Page 9: ... two of the three 10 32 x screws and lock washers provided along the top edge Step 2 Slide the trip paddle over the common trip actua tor bar approximately 1 from the side frame Use the remaining 10 32 x 3 i screw and lock washer to fasten the trip paddle in place Fig 16 Fig 16 Trip Paddle Installation 9 Courtesy of NationalSwitchgear com ...

Page 10: ...to the CT s as shown in Fig 17 Pay special attention to the polarity White common Black tap Step 3 Tie the wire harness to the insulated fasteners un der each CT using the wire ties provided Make t certain that the wire harness will not interfere with the mechanism of the breaker Fig 17 Step 4 Loosen the 2 16 mechanism bolts above the center phase CT and insert the insulated barrier provided Do no...

Page 11: ...NOTE Extreme caution must be used when working on a closed breaker DO NOT reach your hands into the mecha nism while adjusting the flux shifter Step 2 OPTIONAL TEST The flux shifter assembly may be tested by closing the breaker and applying a 9V dc power source to the flux shifter leads The red wire is the positive lead The breaker should trip Programmable Trip Unit Installation Step 1 Insert the ...

Page 12: ...ted to the programmable trip unit through a wiring harness provided Step 1 Mount the neutral sensor on the outgoing neutral lead normally in the equipment s bus or cable compartment Fig 22 Step 2 Connect the neutral sensor wire harness to the correct taps on the sensor The tap setting on the neutral sensor must match the phase sensors Maintain the following color code White Common Black Tap I I 1L...

Page 13: ...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 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 activations False...

Page 14: ...its equipment mounted secondary disconnect block Also check for continuity from the breaker mounted neutral secondary disconnect block through to the female harness connector C 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 23 D Make sure that the neutral conductor is carry ing only that neutral current assoc...

Page 15: ...ECTIONS FOR GROUND FAULT OPTION ONLY 9 Oa 61 02 04 Os 06 R w H E COMM I D NET T 24Vdc POWER E A B C 3 0 i VOLTAGES i T t as r 0 FLUX SHUT TRIP DEVICE CONNECTIONS FOR COMMUNICATIONS OPTION ONLY Ic r I 4 W1RI LOAD B J i 0 0 BREAKER BACK FRAME NEUTRAL SENSOR DISCONNECT LEFT POLE CURRENT SENSOR i 0 r NEUTRAL TAP COM LOAD LINE O EQUIPMENT MOUNTED NEUTRAL SENSOR 4 Wire Load Figure 23 Cabling Diagram Mic...

Page 16: ...nstallation operation 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 4 GE Electrical Distribution Control General Electric Company 41 Woodford Ave Plainville CT 06062 1995 General Electric Company GEH 6467 0495 PSA Courtesy of NationalSwitchgear ...

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