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FAQ within [ Molded Case Circuit Breakers ]

21-30 of Total 49

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  • 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

  • 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

  • Rated insulation voltage

    It is voltage which ensures withstand voltage and it is used as basis to determine insulation distance. More Details >>

    • No：22362
    • Release Date：2018/08/31 14:33

  • Degree of protection

    In order to prevent breakdowns and human injuries, it is necessary to select a control device having protection structure suitable for each purpose. The prot... More Details >>

    • No：22443
    • 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

  • 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

  • How to install cassette type accessories

    A circuit breaker shall be Trip position when installing Cassette type accessory. The breaker may be damaged if installing in "ON" or "OFF" position. Moreove... More Details >>

    • No：22422
    • 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

  • Side by side installation

    It is possible to attach closely if there is no problem about the insulation distance between live parts such as a terminal bar and load currents are 80% or ... More Details >>

    • No：22400
    • Release Date：2018/08/31 14:33

21-30 of Total 49

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