A circuit-breaker, the moving contacts of which return to and remain in the open position when the automatic opening operation is initiated after the initiation of the closing operation, even if the closing command is maintained.
It clearly indicates contact position through flag indication (Red-ON,Green-OFF) thus enhancing safety.
The thermal operation provides protection from moderate overloads.under overload condition,a thermometallic element(bimetallic strip) deflects until it operates a latching mechanism allowing the main conatcts to open. In magnetic operation, large overloads or short circuit current actuates a solenoid causing a plunger to strike the latching mechanism rapidly opening the main contacts.
In a current limiting breaker,the tripping & arc control mechanism are so designed that under short circuit conditions,the contacts are physically separated and the electodynamic forces set up by fault current, assist the extinction is less than half cycle.
Execution (pole) - Three Pole (TP)
Number of Poles
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