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    How many operating cycles (endurance operations) are Masterpact NT/NW circuit breakers good for?

    ISSUE
    How many operating cycles (endurance operations) are Masterpact NT/NW circuit breakers good for?

    PRODUCT LINE
    Masterpact NT/NW breakers

    ENVIROMENT
    This applies to UL489, ANSI or IEC rated Masterpact breakers.

    CAUSE
    Need to know the endurance rating of Masterpact breakers.

    RESOLUTION
    Endurance Operations
    ANSI C37 Rated Breakers
    Frame Rating   800/1600A           2000A         3200/4000A       4000/5000/6000A  
    Interrutping Code   N1 H1 H2 H3 L1 L1F H1 H2 H3 L1 L1F H1 H2 H3 L1 H2 H3 L1
    Endurance Rating (C/O Cycles) Mechanical 12500 12500 12500 12500 12500 12500 10000 10000 10000 10000 10000 10000 10000 10000 5000 5000 5000 5000
    (with no maintenance) Electrical 2800 2800 2800 2800 2800 2800 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
    UL489 Rated Breakers                                      
    Frame Rating   800/1200/1600/2000A *     2500/3000A   4000/5000/6000A    
    Interrutping Code   N H L LF H L H L  
    Endurance Rating (C/O Cycles) Mechanical 12500 12500 12500 12500 10000 10000 5000 5000  
    (with no maintenance) Electrical 2800 2800 2800 2800 1000 1000 1000 1000  
    * The endurance rating for 2000 A, N/H/L/LF is 10,000 for mechanical and 1000 for electrical.          
    IEC 60947-2 Rated Breakers    
    Frame Rating   800/1000/1250/1600A       2000A           2500/3200/4000A     4000B/5000/6300A  
    Interrutping Code   N1 H1 H2 L1 H10 N1 H1 H2 H3 L1 H10 H1 H2 H3 H10 H1 H2  
    Endurance Rating (C/O Cycles) Mechanical 12500 12500 12500 12500 12500 10000 10000 10000 10000 10000 10000 10000 10000 10000 10000 5000 5000  
    (with no maintenance) Electrical 440V 10000 10000 10000 3000 - 8000 8000 8000 3000 3000 - 5000 5000 1250 - 1500 1500  
      Electrical 1150V - - - - 500 - - - - - 500 - - - 500 - -

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