1.8. 33-790-11
Page 73
Section 12 - Inspection and Maintenance
12.0 GENERAL
Type DS circuit breakers are "top
of
the line" equipment.
This means they are manufactured under a high degree
of
quality control,
of
the best available materials and with
a high degree
of
tooling for accuracy and interchange-
ability
of
parts. Design tests show them to have durability
considerably beyond minimum standards requirements.
All
of
these factors give the DS line
of
breakers high reli-
ability. However, because
of
the variability
of
application
conditions and the great dependence placed upon these
breakers for protection and the assurance
of
service con-
tinuity, inspection and maintenance checks on them
should be made on regular schedules.
Since maintenance
of
these breakers will consist mainly
in
keeping them clean, the frequency
of
maintenance will
depend to some extent on the cleanliness
of
the sur-
roundings.
If
there is much dust, lint or other foreign mat-
ter present obviously more frequent maintenance will be
required.
A WARNING
BE SURE CIRCUIT
BREAKER
CONTACTS ARE OPEN
AND
SPRINGS DISCHARGED BEFORE DOING MAINTE-
NANCE WORK. FAILURE TO DO SO COULD CAUSE
BODILY
INJURY.
DIMENSION A
, .020
MINIMUM
BOTH SIDES
BREAKER CLOSED
B
r-
THESE FACES
I
PARALLEL
BREAKER CLOSED
Fig.
84
Contacts and their Adjustment, DS-206 Breaker
Effective October 1998
BREAKER OPEN
BREAKER OPEN
a
0
D
0
Courtesy of NationalSwitchgear.com
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