26 – 2
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.
Rated current coding
The rated current is coded at the factory, i.e. each and every circuit breaker can only be inserted into a cradle if they have the same rated
current.
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 solenoid.
Lock OPEN
This additional function prevents closing the circuit breaker and fulfils the disconnecting condition in OFF position as per IEC 60947-2:
- "Mechanical Off" button pressed
- main contacts OPEN
- crank handle of draw-out circuit breakers removed
- the various interlocking conditions are fulfilled.
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.
Energy transformer
Power supply for the trip unit.
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
For remote tripping and interlocking of the circuit breaker. Circuit breaker application in EMERGENCY OPEN circuits together with an
EMERGENCY OPEN facility to be arranged separately. The circuit breaker shall not be tripped by short-time voltage drops (e.g. motor start-
up).
Undervoltage release (time delayed)
For remote tripping and interlocking of the circuit breaker. The circuit breaker shall not be tripped by voltage drops (e.g. system transfers).
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