3. Block the
trip device, when supplied, to
prevent tripping.
4. Remove’ right and left hand accelerating springs (Fig.
4).
10.
11
12.
5. Insert
closing handle
as in
Figure 5 and slowly operate until arcing contacts
touch. All arcing contacts should make simultaneously
with permissible variation of
Movable
arcing contact fingers should align with stationary
arcing contacts.
Refer to Part 4 for adjusting instructions if
ment or
observed.
arcing
contacts
designed with side clearances for better
guidance inside the
chutes. A side to side move-
ment of
is allowable. Close breaker and check
on main contacts:
6. With maintenance closing handle in position and trip
bar in tripped position, proceed to close breaker. Oper-
ating mechanism will now be trip free and contacts
should not make.
7. Remove maintenance
handle and
breaker
by moving
bar.
Replace one pull-off spring right side only.
Inspect each arc chute to be
plates are dam-
aged. Replace chutes and interphase barriers on break-
ers. Move contacts in by hand to insure contacts
move in and
freely.
To avoid possible injury
NEVER
handle or touch any
of the breaker when the stored energy
mechanism is charged.
close button on front
Breaker will close. Depress red trip button
(located in charging handle). Breaker will open.
Recharge stored energy mechanism and close breaker.
Slowly move series trip coil magnet (armature) to
fully closed position. Breaker should trip before arma-
ture touches pole face assembly. Repeat this procedure
on
poles.
On draw-out breaker,
stored energy mech-
anism, close breaker and move draw-out interlock
plate to the left. Breaker will trip. D/O interlock plate
must be fully
to the right before operating
breaker to prevent trip-free operations. (Figure 6).
Figure 6
Charge stored energy mechanism and close breaker.
Pull padlock lever out. Breaker should trip before pad-
lock slot is fully exposed.
14. Check retaining rings and hardware for tightness.
15. Basket and finger
should be secured with
Nylok retaining screws. Contact
must be free
of dirt and foreign particles. The secondary contacts
should operate freely.
