Page 80
top pan. This allows this mechanism to float. Screws
should be tightened and then backed off 1/2 turn to allow
mechanism to float.
12.3 LUBRICATION
In
general, the circuit breaker requires only moderate
lubrication at regular intervals. The use
of
a special lubri-
cant is required
in
a few places, and must be applied with
care. Only small quantities are needed. All excess must
be removed with a clean cloth to prevent any accumula-
tion
of
dust
or
dirt. Avoid any lubricant on insulation
or
other electrical parts. Care must be taken to prevent any
of
the molybdenum lubricant reaching any current carry-
ing contact surface.
Fig.
91
Lubrication Points on Right Side
of
Mechanism
(385303)
12.3.1 Frequency
Type DS-206/DS-206S breaker after 1750 operations.
Type DS-416/DS-416S/DS-420 breakers after 500 oper-
ations.
Type DS-632 and DS-840 breaker after 250 operations.
1.8. 33-790-11
Note: Breakers that have been stored or have infre-
quent operations shall be operated a minimum
of
five
times before being placed
in
service.
A WARNING
FAILURE TO INSPECT, CLEAN, LUBRICATE AND
MAINTAIN CIRCUIT BREAKER AT RECOMMENDED
FREQUENCIES COULD RESULT IN FAILURE OF
EQUIPMENT TO OPERA TE PROPERLY UNDER
FAULT CONDITION. WHICH COULD CAUSE EQUIP-
MENT DAMAGE AND/OR BODILY INJURY.
12.3.2 Location and Lubricant
Refer to Figures 90 and 91. The numbered references
below correspond to those
on
the above figures.
Molykote BR-2 Plus by Dow Corning (Molybdenum Disul-
phide
in
Lithium Grease Cutler-Hammer #53701 QB)
or
equivalent should be used sparingly on the following sur-
faces.
l The spring-charge indicator surface engaging with
the cut-off switch link.
The cam surface operating the cut-off switch link.
~
The pins
on
both ends
of
the constraining link.
D Shunt trip moving armature surface, Fig. 19c.
f The curved surface
of
the trip latch.
Y Spring release moving armature surface, Fig. 19d.
y The trip shaft, Fig. 19c, as shown by balloons
y.
« The surface
of
the cut-off switch link.
» The main spring pins
on
each end
of
the crankshaft
and fixed ends.
Note: All parts
of
the levering mechanism, Figure 89
have sufficient lubrication, and should not require
any further attention.
A WARNING
BE SURE CIRCUIT BREAKER CONTACTS ARE OPEN AND CLOSING SPRINGS ARE DISCHARGED AFTER
COMPLETING MAINTENANCE WORK. FAILURE TO DO SO COULD CAUSE BODILY INJURY.
Effective October 1998
Courtesy of NationalSwitchgear.com
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