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

It is from -25 to 55℃ in Trip or OFF position. However, it shall be in an environment without condensation and freezing

A circuit breaker shall be Trip position when installing Cassette type accessory. The breaker may be damaged if installi

Only electricians who have enough technical knowledge should change the setting of overcurrent tripping and earth leakag

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

When making a transformer to energize, a large inrush current may flow. The circuit breaker is therefore required to pre

It is the maximum voltage which meets the performance criteria for the rated operational voltage.

It is voltage which ensures withstand voltage and it is used as basis to determine insulation distance.

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

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 ]

31-40 of Total 49

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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
Storage temperature range of MCCBs and ELCBs

It is from -25 to 55℃ in Trip or OFF position. However, it shall be in an environment without condensation and freezing even in a short time. More Details >>
- No：22426
- 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
Change Electronic relay characteristics when it is energized

Only electricians who have enough technical knowledge should change the setting of overcurrent tripping and earth leakage tripping characteristics. Moreover,... More Details >>
- No：22409
- Release Date：2018/08/31 14:33
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
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
Operational voltage

It is the maximum voltage which meets the performance criteria for the rated operational voltage. More Details >>
- No：22367
- Release Date：2018/08/31 14:33
Rated insulation voltage

It is voltage which ensures withstand voltage and it is used as basis to determine insulation distance. More Details >>
- No：22362
- 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
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

31-40 of Total 49

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