Siemens SENTRON 3ZX1812-0WL00-0AN0, Руководство по эксплуатации

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6.9 Troubleshooting
Fixed-moun-
ted breaker Draw-out
breaker
Disturbance Cause Remedy
Circuit-breaker cannot be closed
and circuit-breaker ready to
X X close.
Ready-to-close indicator shows:
X X
1. Spring not charged Charge spring
2. Undervoltage release not
excited
Energize undervoltage release
X X
3. Mechanical reclosing lock-out
effective
Rectify cause of overcurrent trip-
ping and press reset button
4. Electrical closing interlock
X X
effective
Shut off control voltage for interlock-
ing
1)
5. „Safe OFF“ locked off by cylin-
der lock
(accessories)
Unlock
1)
6. „Safe OFF“ locked off by
padlocks
(accessories)
Remove padlocks
1)
7. „Mechanical OFF“ button
X X locked off
(accessories)
Unlock the „Mechanical OFF“ but-
1)
ton
8. „EMERGENCY OFF“ button
engaged in operating position
Release „EMERGENCY OFF“ but-
1)
by rotating it
(accessories)
ton
9. Lockout against closing with
X X cubicle door open effective
(accessories)
Close cubicle door
10. Mutual mechanical circuit-
X X breaker interlocks effective
(accessories)
11. Electronic overcurrent re-lease
X X
missing or incorrectly installed
Open second circuit-breaker or rack
1)
into disconnected position
Fit electronic overcurrent release
properly
12. Racking handle withdrawn Rack circuit-breaker into
disconnected, test or connect posi-
X
tion, unlatch crank and push crank
fully in
Circuit-breaker cannot be closed
X X
and circuit-breaker ready to close.
1. Closing coil not energized or
incorrectly energized
Check or apply correct voltage
X
Ready-to-close indicator:
2. Circuit-breaker in discon-nected
position in guide frame
Rack circuit-breaker into test or
connected position
3. Have been removed the auxi-
liary connectors
X
Plug in the auxiliary connectors
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!
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