PLANNED MAINTENANCE PROGRAM:
A scheduled program for maintenance
of
low voltage power circuit breakers consists
primarily
of
"good housekeeping"
in
conjunction with visual inspection, tightening all
connections and non-pivotal joints, and electrical testing.
1. CLEAN AND TIGHTEN - Low voltage power circuit breakers should be periodically
cleaned, tightened and inspected. The manufacturer's instruction book for the
breaker
should be read thoroughly and their recommendations
for
lubricating and
clearances
should be followed closely.
2. TEST - The voltage power circuit breaker should be subjected to simulated overload
conditions to verify that the breaker
is
operating within its specifications and
tolerances. This is important because, after a period
of
time, vibration and
environmental conditions can render the breaker inoperable. Manually opening or
closing the main contacts
of
the breaker does not "exercise" the overload trip
device.
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