60amp 3P Miniature Circuit Breaker

MCBs Commercial 6kA 'C' Curve Function: Protection and control of circuits against overloads and short-circuits in commercial and light industrial installations. Operation: Circuit breakers are rated both by the normal current that they are expected to carry, and the maximum...

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MCBs Commercial 6kA 'C' Curve

Function:

Protection and control of circuits against overloads and short-circuits in commercial and light industrial installations.


Operation:

Circuit breakers are rated both by the normal current that they are expected to carry, and the maximum short-circuit current that they can safely interrupt. This latter figure is the ampere interrupting capacity (AIC) of the breaker.

Under short-circuit conditions, the calculated maximum prospective short-circuit current may be many times the normal, rated current of the circuit. When electrical contacts open to interrupt a large current, there is a tendency for an arc to form between the opened contacts, which would allow the current to continue. This condition can create conductive ionized gases and molten or vaporized metal, which can cause further continuation of the arc, or creation of additional short circuits, potentially resulting in the explosion of the circuit breaker and the equipment that it is installed in. Therefore, circuit breakers must incorporate various features to divide and extinguish the arc.

The maximum short-circuit current that a breaker can interrupt is determined by testing. Application of a breaker in a circuit with a prospective short-circuit current higher than the breaker's interrupting capacity rating may result in failure of the breaker to safely interrupt a fault. In a worst-case scenario the breaker may successfully interrupt the fault, only to explode when reset.

Typical domestic panel circuit breakers are rated to interrupt 10 kA (10000 A) short-circuit current.

Miniature circuit breakers used to protect control circuits or small appliances may not have sufficient interrupting capacity to use at a panel board; these circuit breakers are called "supplemental circuit protectors" to distinguish them from distribution-type circuit breakers.


Features

•Tripping curve - ‘C’ magnetic setting between 5 and 10In

•Breaking capacity: 6,000A

•Voltage rating: 230/400V AC

•Current rating: 2 to 63A

•Conform with IEC 60898-1, 60947-2 

 

Connection capacity

•'C' curve - 25mm2 rigid, 16mm2 flexible


Technical data


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