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What are Schneider breaker trip curves in the multi 9 breakers?

Can someone help me uderstand the trip curves in the Schneider multi 9 breakers.

  • Hello Doug,

    Please find the multi9 trip curve from (download.schneider-electric.com/files, page 66.

    For further technical support, please contact our customer care team @ 1-800-565-6699.

    Alec @Schneider Electric
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    Employee Mitarbeiter

    What do the B curve, C curve, D curve, K curve and Z curve designations mean on Multi 9 breakers?

    Product Line:
    Circuit Breakers

    Environment:
    Applies to the ac rated C60 Multi-9 devices

    Resolution:
    For C60 Multi-9 devices, ac rated, the following is the meaning of the trip curves:
    B curve: 3.2 - 4.8 times amp rating for UL489 and UL1077 (3 - 5 times amp rating for IEC)
    C curve: 7 - 10 times amp rating
    D curve: 10 - 14 times amp rating
    K curve: 10 - 14 times amp rating
    Z curve: 2.4 to 3.6 times amp rating
    Trip curves are included in the 0860CT0201 catalog.

    You can find the information on their site as well. Go here: https://www.schneider-electric.us/en/faqs/FA228794/ 

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