Page 76
12.1.2.1 DS-206, DS-206S, DS-416, DS-416S
and
DS-420
Remove the barriers and the arc chutes to expose the
contacts:
With the breaker open, examine the contact tips
of
mov-
ing and stationary arcing and main contacts. If the tips
are burned or worn more than .030", the contacts must
be replaced. Also check the dimension (C) between the
stationary arcing contacts (Figures 84 and 85). It should
be .42 ± .08.
If
this dimension is not maintained, the sta-
tionary arcing contacts must be replaced.
DIMENSION A
.020
MINIMUM
BOTH SIDES
0,
~
"·
r·
1..--·
BREAKER
CL.OSED
Fig. 87 Contacts and their Adjustment, DS-840 Breaker
1.8. 33-790-11
Close the breaker and check the contact engagement
according to Figures 84 and 85. The main stationary con-
tact fingers should be parallel (B) to the fixed contact
cage.
If
not, adjust the contacts according to 12.2.3. Also
check the dimension (A) between the stationary arcing
contacts and the center section
of
the cage.
If
this dimen-
sion is not .02 inches
or
greater, the stationary arcing
contacts should be replaced.
Replace the barrier and the arc chutes after inspection is
completed.
Note: The 05-206 adjustments and maintenance
apply completely
to
the 05-2065. Also, the 05-420
instructions cover the 05-4165.
DIMENSION C
l_
BREAKER OPEN
D
D
DI
81
0
D
D
0
0
0
D
D
Effective October 1998
Courtesy of NationalSwitchgear.com
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