Siemens WL Series Operating Instructions Manual page 61

6.9 Troubleshooting
Fixed-moun- Draw-out
ted breaker breaker
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1)
Safety feature!
This remedy action amounts to a reversal (disabling) of a safety precaution
installed earlier. Please ensure that such disabling is now permissible / authori-
zed!
Disturbance
Circuit breaker cannot be
closed.
Circuit breaker not ready to
close.
Ready-to-close indicator
shows:
Possible Cause(s)
1. Spring not charged
2. Undervoltage release not ener-
gized.
3. Mechanical open fuse lock-out
effective
4. Electrical closing interlock effective Shut off control voltage for interlocking
Safety OPEN
5. " " locked with cylin-
der lock
(accessories)
Safety OPEN
6. " " locked with pad-
locks
(accessories)
7. "OPEN" button locked off
(accessories)
8. "EMERGENCY OPEN" button
engaged in
operating position
(accessories)
9. Lockout effective against closing
when cubicle door is open (acces-
sories)
10. Mutual mechanical circuit breaker
interlocks effective (accessories)
trip unit
11. Electronic missing or
incorrectly installed
12. Shunt trip energized
13. Close coil energized
14. Racking handle withdrawn
Remedy
Charge spring
Energize undervoltage release
For fused circuit breakers:
Replace defective fuses and press
reset button
1)
1)
Unlock
1)
Remove padlocks
1)
Unlock the "OPEN" button
Release "EMERGENCY OPEN" but-
1)
ton by
rotating it
Close cubicle door
Open second circuit breaker or rack
1)
into disconnected position
trip unit
Install electronic properly
Deenergize shunt trip
Closing coil has to be deenergized
shortly for reclosing
Rack circuit breaker into disconnected,
test or connect position, unlatch crank
and push crank fully in
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