Operating characteristics described in our catalog (if there is no "Note" particularly) mean operating time when it star

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

Basically you have to consider the effect of harmonic waves, but there are two ways as below. 1. Refer to the recommende

A circuit breaker must have interrupting ratings. These are classified as rated short-circuit breaking capacities in IEC

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

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

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

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

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

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

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FAQ within [ Molded Case Circuit Breakers ]

21-30 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
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
How to select at Inverter circuit

Basically you have to consider the effect of harmonic waves, but there are two ways as below. 1. Refer to the recommended rated current by inverter manufactu... More Details >>
- No：22360
- 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
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
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
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
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
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
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

21-30 of Total 49

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