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PowerVac
5kV Vertical Lift
®
Chapter 12. Repair and Replacement
7. Remove the four bolts (item 6) securing the
trip coil brackets to the mechanism side
plate. See Figure 44. Slide the coil as-
sembly toward the front of the mechanism,
freeing the plunger from the slotted posi-
tive interlock arm.
8. Cut the coil wires and remove the coil and
plunger.
9.To install and secure the new trip coil to the
mechanism side plate, reverse the above
procedures and connect the leads with in-
sulated butt connectors (Figure 44).
10.Install the interlock bracket and tension
spring.
11.The collar and washer (Figure 44, item 3
and 7) must be positioned below the posi-
tive interlock cam, Figure 44 item 9, slightly
touching.
7
10
4
8
5
Courtesy of NationalSwitchgear.com
9
1 Trip Coil
2 Plunger Button
3 Collar
4 Tension Spring
5 Interlock Bracket
Figure 44. Trip Coil and Linkage (Closing Spring Removed)
12.The set screw in the collar (Figure 44, item
3) should then be tightened to the plunger
extension. The adjustment screw (Figure
44, item 8) must not be readjusted.
Apply locite to the threads on the pivot bolt.
Charge the breaker and electrically close and
trip the breaker to make certain the reassembly
of the mechanism is correct.
NOTE: THE POSITIVE INTERLOCK MUST BE
CHECKED AFTE REPLACING A TRIP COIL ON
A BREAKER. SEE CHAPTER 11 FOR ADJUST-
MENTS.
6
Trip Coil Mounting Bolts
7
Washer
8
Adjusting Screw
9
Positive Interlock Cam
10 Set Screw
46
2
6
1
6
3
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