81
Instruction Booklet
IB 33-790-1J
Effective November 2010
Instructions for Low Voltage Power
Circuit Breakers Types DS and DSL
EaToN CorPoraTIoN www.eaton.com
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.
12.3.1 Frequency
Type DS-206/DS-206S breaker after 1750 operations.
Type DS-416/DS-416S/DS-420 breakers after 500 opera-
tions.
Type DS-632 and DS-840 breaker after 250 operations.
Note: Breakers that have been stored or have infre-
quent operations shall be operated a minimum of five
times before being placed in service.
FAILURE TO INSPECT, CLEAN, LUBRICATE AND
MAINTAIN CIRCUIT BREAKER AT RECOMMENDED
FREQUENCIES COULD RESULT IN FAILURE OF
EQUIPMENT TO OPERATE 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 Eaton #53701QB) or equivalent
should be used sparingly on the following surfaces.
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.
Shunt trip moving armature surface, Fig. 19c.
The curved surface of the trip latch.
Spring release moving armature surface, Fig. 19d.
The trip shaft, Fig. 19c, as shown by balloons .
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.
BE SURE CIRCUIT BREAKER CONTACTS ARE OPEN AND CLOSING SPRINGS ARE DISCHARGED AFTER
COMPLETING MAINTENANCE WORK. FAILURE TO DO SO COULD CAUSE BODILY INJURY.
WARNING
WARNING
