Troubleshooting - Siemens WL Serie Betriebsanleitung

6.10

Troubleshooting

Disturbance
Circuit breaker cannot be closed.
Circuit breaker not ready to close.
Ready-to-close indicator shows:
Circuit breaker cannot be closed.
Circuit breaker ready to close.
Ready-to-close indicator:
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!
6 – 19
Possible Cause(s)
1. Spring not charged
2. Undervoltage release not energized.
3. Mechanical open fuse lock-out effective
4. Electrical closing interlock effective
Safety OPEN
5. " " locked with cylinder lock
(accessories)
Safety OPEN
6. " " locked with padlocks
(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 (accessories)
10. Mutual mechanical circuit breaker interlocks
effective (accessories)
trip unit
11. Electronic missing or incorrectly
installed
12. Racking handle withdrawn
1. Closing coil not energized or incorrectly ener-
gized
2. Circuit breaker in disconnected position in
guide frame
3. The secondary disconnects have been
removed
Remedy
Charge spring
Energize undervoltage release
For fused circuit breakers:
Replace defective fuses and press reset button
Shut off control voltage for interlocking
1)
Unlock
1)
Remove padlocks
1)
Unlock the "OPEN" button
Release "EMERGENCY OPEN" button
rotating it
Close cubicle door
Open second circuit breaker or rack into discon-
1)
nected position
trip unit
Install electronic properly
Rack circuit breaker into disconnected, test or
connect position, unlatch crank and push crank
fully in
Check or apply correct voltage
Rack circuit breaker into test or connected posi-
tion
Plug in the secondary disconnects
1)
1)
by