Siemens Sentron WL Operating Instructions Manual page 62

6.9 Störungsbeseitigung
Fixed-mounted Draw-out
circuit- breaker circuit breaker
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6 – 12
→ (Seite 6-10)
Disturbance
circuit breaker cannot be
closed and circuit breaker not
ready to close.
Ready-to-close indicator
shows:
6.9 Troubleshooting
Cause
1. Spring not charged
discharged
2. Undervoltage release not
energized
3. Mechanical reclosing lock-out
effective
4. Electrical closing interlock
effective
5. "OFF" locked off by cylinder
lock (accessories)
6. "OFF" locked off by
padlocks
(accessories)
7. "Mechanical OFF" button
locked off (accessories)
8. "EMERGENCY OFF" button
engaged in operating position
(accessories)
9. Lockout against closing with
cubicle door open effective
(accessories)
10. Mutual mechanical circuit
breaker interlocks effective
(accessories)
11. Electronic overcurrent release
(trip unit) missing or incorrectly
installed
12. Shunt trip energized
13. Closing coil energized
14. Racking handle withdrawn
1)
Safety feature!
This remedy action amounts to a reversal (disabling) of a safety pre-
caution installed earlier. Please do ensure that such disabling is now
permissible / authorized!
Remedy
Charge spring
CHARGED
Energize undervoltage release
Rectify cause of overcurrent trip-
ping and press reset button
Switch off control voltage for inter-
1)
locking
1)
Unlock
1)
Remove padlocks
Unlock the "Mechanical OFF"
1)
button
Release "EMERGENCY OFF"
1)
button by rotating it
Close cubicle door
Open second circuit breaker or rack
1)
into disconnected position
Fit electronic overcurrent release
properly
De-energize shunt trip
Closing coil has to be de-energized
shortly for reclosing
Rack circuit breaker into discon-
nected, test or connected position,
unlatch crank and push it fully in
3ZX1812-0WL00-0AN4