1.8. 33-790-11
12.1.2
Whatto
Inspect
First withdraw the breaker from the compartment.
Remove barriers. Remove arc chutes.
If
there is a
deposit
of
dust, blow clean with compressed air, if avail-
able. Wipe accessible areas with a clean dry cloth.
Inspect contacts.
Fig. 86 Contacts and their Adjustment, DS-632 Breaker
Effective October 1998
Page 75
Note: Switching and fault interruptions and the mak-
ing
of
motor
inrush currents will cause some pitting
of
the breaker contact parts. A large accumulation
of
operations will give the contacts, especially the arc-
ing contacts, a mottled, dirty, eroded appearance.
This appearance is the normal result
of
arc burning
and in itself is no cause
for
concern.
DIMENSIONC
Courtesy of NationalSwitchgear.com
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