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11

4.

Slide the adapter bracket and connector assem-

bly over the guide pins of the trip unit bracket.

Press the two steel push nuts provided onto the

guide pins using a nut driver, as shown in Figure

12, until the assembly is held firmly against the

trip unit mounting plate.

5.

While holding the adapter bracket and connector

assembly firmly in place against the mounting

plate, bend the two locking tabs on the mounting

plate into the mating notches on the adapter

bracket using a screwdriver, as shown in Figure

13.

Figure 12. Installing the push nuts onto the guide pins.

Figure 13. Locking tabs on mounting plate.

Содержание MicroVersaTrip Plus

Страница 1: ...to ANSI Standard C37 59 allowing the retrofitter to properly install the kit and acceptance test the breaker This publication covers installation of MicroVersaTrip Plus and MicroVersaTrip PM Con versi...

Страница 2: ...Screw Adjustment 8 Microswitch Linkage 8 Flux Shifter Test 8 Installing the Trip Unit Wiring Harness 10 Installing the Trip Unit Mounting Plate 12 Installing the Current Sensors 13 LA 800 Current Sens...

Страница 3: ...pin trip unit connector 10 10 36 pin connector adapter bracket 10 11 Adapter bracket locking tabs 10 12 Installing the push nuts onto the guide pins 11 13 Locking tabs on mounting plate 11 14 Trip uni...

Страница 4: ...ng to the breaker both primary and secondary Remove the breaker to a clean well lighted work area WARNING Low voltage power circuit breakers use high speed stored energy spring operating mecha nisms T...

Страница 5: ...rated in Figure 1 4 Remove the wires from the original current sen sors CTs if present and slide off the CTs 5 Unscrew the knob on the end of the manual charging handle and pull the handle down part w...

Страница 6: ...n of the Micro VersaTrip Plus or MicroVersaTrip PM conversion kit The components provided with the kit are shown in Figure 3 Figure 3 Components supplied with the conversion kit Trip Unit Flux Shifter...

Страница 7: ...nt with the breaker reset link 12 4 Install the flux shifter assembly on the right side of the breaker frame where the original flux shifter if present was removed The two mount ing studs should fit t...

Страница 8: ...and the self locking nut on the bolt Do not overtighten the nut as the bolt must be free to rotate within the connecting links 2 With the breaker in the OPEN reset position push the lower link 7 down...

Страница 9: ...9 Figure 8 Parts sequence for connecting the microswitch link Washers Microswitch Link Breaker Reset Link Flux Shifter Reset Arm 1 4 20 Bolt Self Locking Nut Adjusting Nuts...

Страница 10: ...converted breaker is energized or primary injected with the mounting plate not installed or installed improperly damage will result to the trip unit wire harness 36 pin connector and current sensors...

Страница 11: ...il the assembly is held firmly against the trip unit mounting plate 5 While holding the adapter bracket and connector assembly firmly in place against the mounting plate bend the two locking tabs on t...

Страница 12: ...onnector from the flux shifter 4 Pass the current sensor leads through the hole on the lower left side from the rear of the breaker as shown in Figures 16 and 17 5 If the trip unit is to be connected...

Страница 13: ...3 Reattach the primary disconnect assemblies to all the studs if the breaker is unfused or to only the load lower studs if the breaker is fused 4 If the breaker is fused reinstall the fuse assem blies...

Страница 14: ...nt door SECTION 5 INSTALLING THE TRIP UNIT Use the following procedure to install the trip unit 1 Pull out the locking lever on the trip unit mount ing plate until it snaps into the open position as s...

Страница 15: ...ipment Figures 20 and 21 show the sensor outlines for the 800 A and 1600 A frame sizes respectively 2 Connect the neutral sensor wire harness to the correct taps on the sensor To maintain the same pol...

Страница 16: ...16 Figure 21 Neutral sensor outline for LA 1600 breakers...

Страница 17: ...the resistance differs considerably from phase to phase the electrical connections may not be properly tightened or it could also indicate improper contact wipe 4 To verify that the breaker has been p...

Страница 18: ...t mounted secondary discon nect block Also check for continuity from the breaker mounted neutral secondary discon nect block through to the trip unit wiring har ness connector c If the breaker s lower...

Страница 19: ...19 Figure 22 Cabling diagram for MicroVersaTrip Plus and MicroVersaTrip PM trip units with ground fault on four wire loads...

Страница 20: ...installation operation or maintenance Should further information be desired or should particular problems arise that are not covered sufficiently for the purchaser s purposes the matter should be ref...

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