Mechanism - Stored Energy Operator - Siemens FCV-500 Instructions Manual

9. Place spacer (36) or (98) on the fixed terminal of the new interrupter assembly and
insert the fixed terminal into the hole in the breaker bushing while guiding pivot ( 12)
into the channel of the radius arm. Pin at pivot with ( 47). Grease pins before
assembly. Connect shock absorber.
10.
Assemble Items ( 14) and ( 15 ) clamping the flexible conductor furnished with the
interrupter assembly between them. The end of the flexible terminal should be flush
with edge of ( 14) and ( 15 ).
11.
Assemble insulator bars (21) to stud support (25 ).
12.
Charge and trip-closed operating mechanism. Adjust ( 13) to produce a 1. 370 inch
dimension between plates (22) and (23), lock ( 13) by tightening lock nuts ( 49) and
( 5 0), lock ( 5 0) to pivot ( 12) first.
13 .
Tighten clamping bolt at fixed terminal.
14.
Repeat the above steps on the other phases, if more than one interrupter assembly is
being replaced.
15.
Check to determine that the shock absorber is not bottoming, in either the open or closed posi­
tions. The position of the shock absorber assembly may be adjusted by varying the number of
shims (164, Fig. 4b).
16.
Operate the circuit breaker 50 times, then check and readjust for the 1.370 inch dimension as
described in Step 12.
CAUTION
ONLY NEW REPLACEMENT INTE R RUPTE RS SHOULD BE READJUSTED TO 1.370 inch (34.8
mm) DIMENSION. INTE R RUPTE RS WITH CONTACT E R ROSION SHOUL D NEVE R BE READ­
JUSTED.
16A. The replacement procedures listed above, (replacing and adjusting one interrupter assembly at a
time) should maintain the required open gap on the interrupter assemblies by reference to the
the two remaining assemblies. If for any reason the adjustment on all assemblies is lost, it will be
necessary to measure between a fixed portion of the underside of the interrupter assembly and
the moveable stem to determine that the change in this measurement from contact closed to
contact open position is on all interrupters within the range of 0.72 to 0.78 inch (19.3 to 19. 8
mm}.
17.
Reassemble the hinged panel to the circuit breaker.
18.
Hi- Pot the vacuum interrupters.
19 .
Verify the opening and closing times.
20.
Recheck primary disconnect stud alignment with respect to other phases and floor. A
slight adjustment of eye bolt at bottom of support bar (21) may be required to restore
alignment. Adjustment of i nsu I ator support structure between studs is not recommended
in field.

Mechanism - Stored Energy Operator

The circuit breaker mechanism should be inspected at 2000 operation intervals. This inspection
should check for loose hardware and any broken parts. The control wiring should be checked
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