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Maintenance and lubrication
Table 2 gives the recommended maintenance
intervals for circuit breakers. These intervals
assume that the circuit breaker is operated
under "usual service conditions" as discussed
in ANSI/IEEE C37.04, section 4 and elaborated
in ANSI/IEEE C37.010, section 4 for outdoor
distribution circuit breakers. The maintenance
and lubrication interval is the lesser of the
number of closing operations or the time
interval since last maintenance.
The vacuum interrupter operator mechanism
is shown in Figure 20, with the front cover
removed to show construction details. Both
the opening spring and the closing spring are
shown. The movable end of the closing spring
is connected to a crank arm. The movable end
of the opening spring is connected to the jack
shaft by a pull rod.
Clean the entire stored-energy operator
mechanism with a dry, lint-free cloth.
Check all components for evidence of
excessive wear. Place special attention upon
the closing spring-crank and the insulating
couplers and linkages.
Lubricate all non-electrical moving or sliding
surfaces with a light coat of synthetic grease
or oil. Lubricants composed of ester oils and
lithium thickeners will be generally
compatible.
For all lubrication (except electrical moving or
sliding surfaces), use one of the following:
Klüber Isoflex Topas L32
(part 3AX11333H)
Klüber Isoflex Topas L32N (spray)
(part 15-172-879-201).
Source:
Klüber Isoflex Topas L32 or L32N:
Klüber Lubrication North America L.P.
www.klueber.com.
Number of years/closing
Circuit
operations (whichever comes
breaker type
SDV7-SE
5 years/10,000 operations
Table 2: Maintenance and lubrication schedule
Fastener check
Inspect all fasteners for tightness. Both
locknuts and retaining rings are used. Replace
any fasteners that appear to have been
frequently removed and replaced.
first)
25
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