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FAQ within [ Molded Case Circuit Breakers ]

11-20 of Total 49

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  • 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

  • Cascade breaking

    It is a method which breaks short circuit current with both upstream and downstream circuit breakers. For example, in the case that short circuit current at ... More Details >>

    • No：22357
    • Release Date：2018/08/31 14:33

  • Interrupting ratings

    A circuit breaker must have interrupting ratings. These are classified as rated short-circuit breaking capacities in IEC 60947-2.e rated ultimate short-circu... More Details >>

    • No：22341
    • Release Date：2018/08/31 14:33

  • Use in 40℃～60℃

    Operating ambient temperature is set to - 10℃ to 40℃. ( However, its average over a period of 24h does not exceed 35℃.) In the case that the ambient temperat... More Details >>

    • No：22370
    • Release Date：2018/08/31 14:33

  • 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

  • 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

  • MCCB bar terminal material

    Bar terminal material for 400A is aluminum alloy, and for 630A or higher is copper. More Details >>

    • No：24819
    • Release Date：2019/04/09 15:13

  • 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

  • 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

  • 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

11-20 of Total 49

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