Emergency Release Of The Circuit-Breaker - Siemens 8DB10 Installation And Operating Instructions Manual

864-5091.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • Revision 06
36.3

Emergency release of the circuit-breaker

Interlocking of the "feeder earthed" function between circuit-breaker and
three-position disconnector:
• Possible in all switch positions of the three-position disconnector.
Or:
• Only possible in three-position disconnector OPEN position.
ATTENTION
If the auxiliary voltage fails, the "feeder earthed" locking device is blocked.
➭ Operate emergency release.
Fig. 171: Position of opening for emergency release
at the circuit-breaker front
➭ Insert a suitable auxiliary means (e.g. a very small screwdriver) in the release opening as far
as it will go, and push softly to the left. Push the lever of the locking device upwards and
remove the auxiliary means.
Fig. 172: Operating the emergency release
① "Feeder earthed" locking device
② Opening for emergency release
Operation
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