Troubleshooting - Siemens 3WN6 Betriebsanleitung

7. Troubleshooting

Fixed-moun- Draw-out
ted breaker breaker
X X
X X
X X
X X
X X
X X
X X
X X
X
X
X X
X
X
*) Caution - Safety device: Do not cancel without a permissibility check.
Disturbance
Breaker cannot be closed
mechanically and/ or electri-
cally (breaker not ready to
close, ready-to-close indica-
tor )
Ready-to-close
indicator = OK till end of
02/97, since 03/97 =
Breaker cannot be closed elec-
trically
(breaker not ready to close,
ready-to-close indicator
OK )
ready-to-close
indicator= OK
Cause
1. Spring not charged
2. Undervoltage release not
excited
3. Mechanical reclosing lock-
out effective
4. Electrical closing interlock
effective
5. Mechanical OFF pusch-
button blocked off
6. Lockout against closing with
switchgear cabinet door
open effective (accessories)
7. Mutual mechanical breaker
interlocks effective (acces-
sories)
8. Electronic overcurrent re-
lease missing or incor rectly
installed
9. Breaker in intermediate po-
sition in guide frame
(Note position indication)
10. Crank hole for shutter not
closed
1. Operating voltage of stored-
energy activation solenoid
incorrect or not available
2. Circuit-breaker in discon-
nected position in guide
frame
3. Take out the auxiliary circuit
plug
Remedy
Charge spring
Energize undervoltage re-
lease
Rectify cause of overcur-
rent
tripping and press RESET
Shut off control voltage for
interlocking *)
Clear the pushbutton*)
Close switch gear cabinet
door
Open second breaker or
crank into disconnected
position*)
Fit electronic overcurrent
release properly
Crank breaker into con-
nected position
Close the shutter (establish
exact position in discon-
nected, test or connected
position)
Check or apply correct
voltage
Crank circuit-breaker into
test or connected position
Plug in the auxiliary circuit
plug
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