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Instruction manual
| Types SDV-R and SDV-R-AR distribution circuit breakers
Figure 24: Operator mechanism
lubrication
Maintenance and lubrication
Table 3 on page 36 presents the
recommended maintenance intervals for the
type SDV-R distribution circuit breakers. These
intervals assume that the circuit breaker is
operated under “usual service conditions” as
discussed in ANSI/IEEE C37.04 and elaborated
in ANSI/IEEE C37.010. When actual operating
conditions are more severe, maintenance
periods may occur more frequently. The
operations counter on the front panel of the
circuit breaker records the number of
operations. 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 24 with the front cover
removed to show construction details. 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 indicated 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.
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.
Klüber L32 or Klüber L32N
