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FAQ within [ Molded Case Circuit Breakers ]

1-10 of Total 49

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  • 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
  • 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
  • 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
  • Inverse time delay operating characteristic

    It is a characteristic that operating time inversely become shorter as current increases. For Molded Case Circuit Breakers, protection characteristic meeting... More Details >>

    • No:22387
    • Release Date:2018/08/31 14:33
  • Inst tripping current value of AC/DC common breaker

    At time-delay tripping zone, it operates with bimetal, therefore the characteristics of AC and DC should be same if the effective values of them are same. Ho... More Details >>

    • No:22392
    • Release Date:2018/08/31 14:33
  • Electronic MCCB 400-1600A How to change rated current and characteristic curve (Except CE breakers)

    First, turn OFF the upstream circuit breaker and the relevant circuit breaker. You must not work in the state where voltage is applied to the relevant circui... More Details >>

    • No:22439
    • Release Date:2018/08/31 14:33
    • Update:2018/08/31 14:35
  • 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
  • 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
  • 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
  • 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

1-10 of Total 49