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  1. Cypher57

    Maximum Interrupting Time - Circuit Breaker

    Please see attached the Maximum Instantaneous conservatively will be taken as 0.016. Bill, I have a TOL for thermal protection. http://files.engineering.com/getfile.aspx?folder=e8abdb41-df33-4be1-ac1f-b227a6b4227f&file=40_Amp_MCCB.png
  2. Cypher57

    Maximum Interrupting Time - Circuit Breaker

    I have MCCB data as follows: MCCB Rating = 40 Amps (i.e. Maximum Continuous Ampere Rating at 40 degree C) Thermal Range = 32 - 40 Amps Magnetic Range = 200 - 400 Amps (i.e. Instantaneous Pickup Range) Horizontal axis = Multiple of current setting (i.e. Multiples of 40 Amps - Breaking Rating)...
  3. Cypher57

    Maximum Interrupting Time - Circuit Breaker

    Thanks. You are correct I am looking for the "Maximum Instantaneous Fault Clearing Time". I guess I have to ask the vendor.
  4. Cypher57

    Maximum Interrupting Time - Circuit Breaker

    Thanks for your response. I have another curve which clearly tells you this info (please see attached) and I was wondering how to interpret the same for the other breaker.http://files.engineering.com/getfile.aspx?folder=cf8d4b16-aeca-4f20-a256-a06096ae1585&file=Cutler_Curve.png
  5. Cypher57

    Maximum Interrupting Time - Circuit Breaker

    Hi, I need to know the "maximum interrupting time" of the FW/HFW Molded-Case Circuit Breakers (see the attached time-current curves). Thanks http://files.engineering.com/getfile.aspx?folder=bc70afd9-4999-4929-8ae3-f295611b349b&file=Time_Current_Curve.png

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