Page 74
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
DIMENSION A
?ltJO
Ml~IM~
..
M BOTH SIDES
--~~
~
..
.~
.
"'
.
,-
~~
1.---
BREAKER CLOSED
1.8. 33-790-11
economical point. Conversely, if the recommended
inspection shows, for instance, heavy accumulations
of
dirt
or
other foreign matter that might cause mechanical,
insulation
or
other electrical damage, the inspection and
maintenance 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give it a visual inspection withdrawn from the compart-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.
DIMENSION C
J
------
BREAKER
OPEN
0
D
0
D
D
D
D
D
Fig. 85 Contacts and their Adjustment, DS-4161420 Breaker
Effective October 1998
Courtesy of NationalSwitchgear.com
To Next Page
Loading...
