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FAQ within [ Molded Case Circuit Breakers ]

31-40 of Total 49

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  • Hot start characteristics

    Operating characteristics described in our catalog (if there is no "Note" particularly) mean operating time when it starts to carry current from the conditio... More Details >>

    • No：22374
    • Release Date：2018/08/31 14:33

  • Minimum operating voltage

    Use with 24V, 0.5A or more for AC and DC in normal use. If the breakers are used less than 24V, use with 6V, 1A or more. Moreover, regular inspection of is ... More Details >>

    • No：22401
    • Release Date：2018/08/31 14:33

  • Operating cycles

    It is the number that can be opened/closed per hour under the conditions specified in the standard. More Details >>

    • No：22436
    • Release Date：2018/08/31 14:33

  • 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

  • Rating of a circuit breaker for transformers primary protection

    When making a transformer to energize, a large inrush current may flow. The circuit breaker is therefore required to prevent unwanted trip. The selection of ... More Details >>

    • No：22343
    • Release Date：2018/08/31 14:33

  • 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

  • Switch disconnector

    Switch disconnector is a switch compatible with IEC 60947-3 standard, and it has no overcurrent tripping element. Please use it as a switch with large switch... More Details >>

    • No：22379
    • Release Date：2018/08/31 14:33

  • AC Breakers used at DC circuit

    It is not possible to use a circuit breaker for AC in DC circuit. Since the Arc-Extinguishing Device structure of circuit breaker for DC is different from th... More Details >>

    • No：22381
    • Release Date：2018/08/31 14:33

  • MCCB 3P4W 3P use

    If switching of neutral pole is not needed, it is possible to use 3-pole MCCB for 3-phase 4- wire circuit. Generally, it is recommended to use 4-pole circuit... More Details >>

    • No：22385
    • Release Date：2018/08/31 14:33

  • MCCB and MCB as terms

    MCCB stands for "Molded Case Circuit Breaker." This is defined in the IEC standard, IEC 60947-2 and in the UL standard, UL 489. MCB stands for "Miniature Ci... More Details >>

    • No：22340
    • Release Date：2018/08/31 14:33

31-40 of Total 49

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