in location


I'm looking for

  • Wholesalers
    • Uncheck All Check All
    • Expand
    • Expand
    • Expand
    • Uncheck All Check All
  • Switchboard Manufacturers
    • Uncheck All Check All

The best way to see what Clipsal electric products can do for your home is seeing them in action at a Clipsal Powerhouse Display Centre.

Product stock may vary according to location. If you're after a specific product range, please check with your chosen location before visiting.

10 Results
    Load More Load Complete
    Change Location

    ESNZ - How many times can a circuit breaker be reclosed after a fault?

    Following is some information relating to types of faults and the number of times a breaker can clear

    these faults.

    Icu - Rated Ultimate Short Circuit Breaking Capacity

    The test for Icu is described in clause 8.3.5 of AS3947.2-1997

    Breaker must open on this fault, then after a time delay be reclosed onto the fault, which it again

    must open and clear. After the second opening, the breaker will :

    - be able to isolate

    - the poles must be able to close (no open circuit)

    - the trip unit must still work properly

    But there is a risk that the circuit breaker will not be able self protect, there is a risk of thermal

    overheating which could lead to the destruction of the breaker. Therefore the breaker should be

    replaced before being reused in normal conditions.

    Ics - Rated Service Short Circuit Breaking Capacity

    The test for Ics is described in clause 8.3.4 of AS3947.2-1997

    Similar to Icu except that after clearing the fault the breaker will be reclosed onto the fault two more

    times. As well as this the breaker must be able to pass a temperature rise test.

    After the third opening, the breaker will :

    - be able to isolate

    - no open circuit on the poles

    - trip unit works properly

    - breaker can be put back into service : it can assume its normal protective function.

    Although the breaker may be put back into service, its replacement must be organised as soon as

    possible, as it might not be able to clear a 4th short circuit.


    The breaker are designed to be able to withstand 12 overloads at 6xIn (those that are UL certified can

    do 50 overloads at 6 times).

    When evaluating the life span take the worse case :

    - if the overload is under 6 times assume it is 6 times

    - if the overload is over 6 times but less than Ics, take Ics

    - etc..

    Didn’t find what you were looking for?

    Try Searching Again View Our Categories

    Need further assistance?

    Our Customer Care department provides total customer service solutions for our residential, industrial and commercial applications.

    Get Assistance