29 – 2
Energy transformer
Power supply for the trip unit.
Guide rail
Used for placing the circuit breaker in the cradle.
Finger clusters
Connect the main terminals of the circuit breaker with the main terminals of the cradle.
Mechanical reclosing lockout and Bell Alarm
After tripping, the circuit breaker cannot be reclosed until the mechanical reclosing lockout has been reset by hand.
Mechanism Operated Auxiliary Contacts (MOC)
A switching module for signaling the circuit breakers switch position, which is mounted in the cradle and activated by the actuating shaft of
the circuit breaker.
Motor-operated mechanism
The geared motor charges the closing spring automatically as soon as voltage is applied to the auxiliary connections. After closing,
the closing spring is automatically charged for the next closing operation.
Position indicator
To show the circuit breaker position in the cradle.
Powerconfig
Software for commissioning and service, free of charge available at:www.siemens.com/powerconfig-download
powerconfig (from Version 2.2) is used as a shared commissioning and maintenance tool for the circuit breakers with communication capa-
bility. It offers a standardized interface and a uniform operator control concept for the activities to be carried out, such as
- Parameterizing
-Operating
- Monitoring, and
- Diagnosing.
powerconfig currently supports German and English. “SENTRON communication handbook” → http://support.automation.siemens.com
Rating Plug
This module defines e.g. the setting range of the overload protection.
Remote reset
The electrical signal of the tripped signaling switch and the red reset button are reset by the optional remote reset coil.
Shunt trip
For remote circuit breaker tripping and locking against closing.
Shutter
Shutters are insulation plates for covering live main circuits in the cradle (shock protection).
Signaling switch for circuit breaker position (TOC)
These auxiliary switches operate according to the circuit breaker position in the cradle (-> Truck-operated contact).
Spring charging lever
The closing spring is charged by several pumping operations.
Tool operation
A cover with a hole (Ø 0,25") means that buttons can only be pressed using a rod.
TOC - Truck operated Cell Switch
For remote signaling of the circuit breaker position in the cradle.
Truck-operated contact (TOC)
A circuit breaker truck-operated auxiliary switch which is mounted in the compartment of a removable circuit breaker and is operated by the
circuit breaker frame (-> Signaling switch for breaker position).
Undervoltage release
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