The degess of protection for ACB is IP20 as standard (under the condition that front door is closed). For MCCB and ELCB,

You can calculate that with MELSHORT 2 (Free of charge).

At time-delay tripping zone, it operates with bimetal, therefore the characteristics of AC and DC should be same if the

It is a protection method which only trips the related circuit breaker and other fault-free circuit does not trip and co

In that case, the rated current and the rated voltage shall be reduced. Refer to the table of derating factors as below.

IEC 60947-2 is an international standard for circuit breakers. The rated voltage for the applicable circuit breaker is 1

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

First, turn OFF the upstream circuit breaker and the relevant circuit breaker. You must not work in the state where volt

It is a characteristic that operating time inversely become shorter as current increases. For Molded Case Circuit Breake

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FAQ within [ Molded Case Circuit Breakers ]

21-30 of Total 49

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degrees of protection to　 IEC60529

The degess of protection for ACB is IP20 as standard (under the condition that front door is closed). For MCCB and ELCB, the degrees of protection can be IP2... More Details >>
- No：24812
- Release Date：2019/04/09 15:18
Short circuit current calculation software

You can calculate that with MELSHORT 2 (Free of charge). More Details >>
- No：22394
- 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
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
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
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 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
Rear stud (B-ST) installed

B-ST is possible. More Details >>
- No：24814
- Release Date：2019/04/09 15:17
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
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

21-30 of Total 49

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