Powered by Safety
®
44
Maintenance
PowlVac
®
STD Vacuum Circuit Breaker
IB-60201
2) Lubrication
CAUTION
CAUTION
!
Before applying any type of lubrication to the
circuit breaker, the stored energy mechanism
should be in the open position, and all springs
should be discharged.
Powell offers a complete lubrication kit
(Powlube-102) which contains all the
lubricants required for maintaining the
circuit breakers. Powlube-102 contains
Rheolube 368A grease, Anderol 456 oil, and
Mobilgrease 28.
Rheolube 368A grease should be lightly
applied to those bearing surfaces that are
accessible. Inaccessible surfaces, such as
bearings, may be lubricated with a light
synthetic machine oil such as Anderol 456
oil. Mobilgrease 28 should be applied to
the electrical contact surfaces.
Lubricate the stored energy mechanism
and other specified parts in accordance
with
Table B, Lubrication
. See Figures 21
and 22 for labeled lubrication photographs.
Table B, Lubrication
lists the location of all
surfaces that should be lubricated, the type
of lubricant to be used, and the method of
applying the lubricant. The guiding rule
in lubrication is to lubricate regularly, use
lubricant sparingly and remove all excess
lubricant. Tilting the circuit breaker will
enable the lubricant to cover the bearing
surfaces.
3) Closing Spring Removal
Figure 23 Main Closing Spring Assembly
Compressed for Removal
a. Bracket
b. Bolt
c. Flat Washer
d. Spacer
e. Connecting Rod
c
d
e
b
a
The closing spring must be removed
in order to perform slow closing of
mechanism.
Although main closing spring removal is
usually not necessary for lubrication, it may
be necessary for performing adjustments
or major overhaul tasks. Furthermore,
removal of the main closing spring permits
slow closing of the mechanism and the
vacuum interrupter contacts. For details,
see
Ch 5 Maintenance,
B. M
echAnISM
A
reA
,
4) Slow Closing of Mechanism
.
