75
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
12.1.1 When to Inspect
Industry standards for this type of equipment recommend
a general inspection and lubrication after the number of
operations listed in Section 12.3.1 of this instruction
book. This should also be conducted at the end of the
first six months of service if the number of operations has
not been reached.
After the first inspection, inspect at least once a year. If
these recommended inspections show no maintenance
requirements, the period may be extended to a more e
co-
nomical point. Conversely, if the recommended inspec-
tion shows, for instance, heavy accumulations of dirt or
other foreign matter that might cause mechanical, insula-
tion or other electrical damage, the inspection and main-
tenance interval should be decreased.
When a breaker opens a heavy fault, at or near its rating,
give it a visual inspection withdrawn from the compart-
ment and with insulating barriers and arc chutes
removed.
Fig. 85 Contacts and Their Adjustment: DS-416/420 Breaker.
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