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FAQ within [ Molded Case Circuit Breakers ]

11-20 of Total 49

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  • Instantaneous tripping

    It is a tripping zone which instantly trips, when significantly overcurrent such as short-circuit currents flow. More Details >>

    • No：22363
    • Release Date：2018/08/31 14:33

  • Front to rear connection

    It is possible to modify to Rear-connection type by Mitsubishi's certified staff. More Details >>

    • No：22399
    • Release Date：2018/08/31 14:33

  • Default setting of electronic breakers

    Each setting knob of the overcurrent trip characteristic is set to the maximum value and then shipped if not specified. However, only the pre-alarm is set to... More Details >>

    • No：22438
    • Release Date：2018/08/31 14:33

  • Arc space

    It means a space between the edge of a exhaust port and panel component ( such as wall or duct) of a circuit breaker. The arc space is needed for smoothly di... More Details >>

    • No：22373
    • Release Date：2018/08/31 14:33

  • Trip free

    It means that it does not interfere with tripping operation even if a handle is held at "ON" position. (It trips when an overcurrent flows even if a handle i... More Details >>

    • No：22378
    • Release Date：2018/08/31 14:33

  • MCCB, ELCB and ACB at higher altitudes

    In that case, the rated current and the rated voltage shall be reduced. Refer to the table of derating factors as below. More Details >>

    • No：24801
    • Release Date：2019/04/09 15:17

  • degrees of protection to　 IEC60529

    The degess of protection for ACB is IP20 as standard (under the condition that front door is closed). For MCCB and ELCB, the degrees of protection can be IP2... More Details >>

    • No：24812
    • Release Date：2019/04/09 15:18

  • Calorific value of the circuit breaker

    1. The internal resistance (per pole) is described in the catalog and technical notes. 2. Power consumption (W) = RI^2 x Poles = Resistance (Ω) x Load curre... More Details >>

    • No：38025
    • Release Date：2021/01/22 17:39

  • Selective coordination

    It is a protection method which only trips the related circuit breaker and other fault-free circuit does not trip and continues power supply in the event of... More Details >>

    • No：22366
    • Release Date：2018/08/31 14:33

  • Operational voltage

    It is the maximum voltage which meets the performance criteria for the rated operational voltage. More Details >>

    • No：22367
    • Release Date：2018/08/31 14:33

11-20 of Total 49

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