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PowlVac® CDR 27kV &38kV Vacuum Circuit Breaker
IB-65020A
Maintenance
19. If there is an air gap of 0.040”
(Figure 23, c) between the trip
armature actuator (Figure 23, b)
and the latch check operator
(Figure 23, d) of 0.040”, then proceed
to step 21.
i. If there isn’t an air gap, loosen
the 10-32 pan head kep nut
(Figure 23, a). Rotate the
eccentric (Figure 24, d) to obtain
the 0.040” gap and tighten the
hardware.
ii. Hold the trip armature actuator
assembly (Figure 23, b) and
loosen the 5/16 hex nut
(Figure 24, a).
iii. Remove the x-washer
(Figure 24, c) and flat washer
from the push to trip support
bracket rivet.
iv. Remove the trip armature
actuator assembly from the push
to trip support bracket and let
it suspend from the top of the
circuit breaker.
v. Rotate the trip armature actuator
to achieve the desired height
of 1.676” +0/-.06” (Figure 25, b)
from the top of the trip roller
(Figure 25, a) to the top of the
circuit breaker frame
(Figure 25, c).
vi. Reinstall the trip armature
actuator assembly to the push to
trip support bracket.
Note:
Dimensions can only be measured
when the actuator assembly is
installed.
vii. Hold the trip armature actuator
and tighten the 5/16 hex nut.
viii. Replace the x-washer and flat
washer that was removed in
step iii.
Figure 24 Trip Armature Assembly Right View
a.
5
/
16
- 18 Hex Nut
b. Trip Armature Actuator Assembly
c. X-Washer
d. Eccentric
e. 10 - 32 Pan Head Cap Screw
a
b
c
d
e
Figure 25 Circuit Breaker Trip Roller
a
b
c
a. Circuit Breaker Trip Roller
b. 1.676” +0/-.06” Desired Trip Roller Height
c. Top of Circuit Breaker Frame
20. Manually CLOSE and TRIP the circuit
breaker so that all springs are
discharged.
