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

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

The range of ambient temperature is from -10 to 40 degree Celsius for not only MCCB but also including Earth Leakage Cir

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

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.

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

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

(1) When "N" is marked on the breaker,connect the N phase wire as marked. (2) When "N" is not marked on the breaker,

It is a button in order to trip MCCB. It is used for regular inspection of the switching mechanism, and trip condition o

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FAQ within [ Molded Case Circuit Breakers ]

21-30 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
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
Ambient temperature

The range of ambient temperature is from -10 to 40 degree Celsius for not only MCCB but also including Earth Leakage Circuit breaker, Earth Leakage Relay and... More Details >>
- No：22352
- 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
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
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
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 connect to 2-pole breaker

(1) When "N" is marked on the breaker,connect the N phase wire as marked. (2) When "N" is not marked on the breaker, N phase wire can be connected to eith... More Details >>
- No：37700
- Release Date：2020/01/17 08:58
How to use Trip button

It is a button in order to trip MCCB. It is used for regular inspection of the switching mechanism, and trip condition of MCCB when Alarm switch (AL) and Shu... More Details >>
- No：22444
- Release Date：2018/08/31 14:33

21-30 of Total 49

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