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FAQ within [ Molded Case Circuit Breakers ]

11-20 of Total 49

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  • Setting change operation while power is on

    It is forbidden to change the characteristic when the breaker ON. Over current trip and earth leakage trip characteristics should be changed by a person with... More Details >>

    • No：37699
    • Release Date：2020/01/18 09:58

  • MCCB Reverse connection

    Almost MCCBs can be connected n reverse. Check the item column of specification table "reverse connection" in the catalog. If it says "Possible", MCCB can be... More Details >>

    • No：22442
    • Release Date：2018/08/31 14:33

  • 2P MCCB only 1-pole use

    No, you must not use 2-pole circuit breaker as 1-pole circuit breaker (series connection as only single phase ). If using it as 1-pole circuit breaker, these... More Details >>

    • No：22382
    • Release Date：2018/08/31 14:33

  • Wrong connection in reverse

    It may not trip a fault current or degrade insulation after tripping. When you connect the device in reverse, you must select a reverse-connectable model. More Details >>

    • No：22345
    • Release Date：2018/08/31 14:33

  • How to connect to 2-pole breaker

    (1) When "N" is marked on the breaker,connect the N phase wire as marked. (2) When "N" is not marked on the breaker, N phase wire can be connected to eith... More Details >>

    • No：37700
    • Release Date：2020/01/17 08:58

  • How to use Trip button

    It is a button in order to trip MCCB. It is used for regular inspection of the switching mechanism, and trip condition of MCCB when Alarm switch (AL) and Shu... More Details >>

    • No：22444
    • Release Date：2018/08/31 14:33

  • IEC60947-2 standard

    IEC 60947-2 is an international standard for circuit breakers. The rated voltage for the applicable circuit breaker is 1000V AC or less, or DC 1500V DC or le... More Details >>

    • No：22361
    • Release Date：2018/08/31 14:33

  • Change Electronic relay characteristics when it is energized

    Only electricians who have enough technical knowledge should change the setting of overcurrent tripping and earth leakage tripping characteristics. Moreover,... More Details >>

    • No：22409
    • 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

  • 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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