Troubleshooting - Siemens SENTRON 3ZX1812-0WL00-0AN0 Operating Instructions Manual

6.9

Troubleshooting

Fixed-moun-
Draw-out
breaker
ted breaker
X X
X X
X X
X X
X X
X X
X X
X X
X
X X
X
X
1)
Safety feature!
This remedy action amounts to a reversal (disabling) of a safety
precaution installed earlier. Please do ensure that such disab-
ling is now permissible / authorized!
Disturbance
Circuit-breaker cannot be closed
and circuit-breaker ready to
close.
Ready-to-close indicator shows:
Circuit-breaker cannot be closed
and circuit-breaker ready to close.
Ready-to-close indicator:
Cause
1. Spring not charged
2. Undervoltage release not
excited
3. Mechanical reclosing lock-out
effective
4. Electrical closing interlock
effective
5. „Safe OFF" locked off by cylin-
der lock
(accessories)
6. „Safe 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 re-lease
missing or incorrectly installed
12. Racking handle withdrawn
1. Closing coil not energized or
incorrectly energized
2. Circuit-breaker in discon-nected
position in guide frame
3. Have been removed the auxi-
liary connectors
Remedy
Charge spring
Energize undervoltage release
Rectify cause of overcurrent trip-
ping and press reset button
Shut off control voltage for interlock-
1)
ing
1)
Unlock
1)
Remove padlocks
Unlock the „Mechanical OFF" but-
1)
ton
Release „EMERGENCY OFF" but-
1)
by rotating it
ton
Close cubicle door
Open second circuit-breaker or rack
1)
into disconnected position
Fit electronic overcurrent release
properly
Rack circuit-breaker into
disconnected, test or connect posi-
tion, unlatch crank and push crank
fully in
Check or apply correct voltage
Rack circuit-breaker into test or
connected position
Plug in the auxiliary connectors
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