It is a tripping zone which instantly trips, when significantly overcurrent such as short-circuit currents flow.

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

When it is connected as special connection, AC/DC compatible circuit breaker can be used with DC 250V or more (3-pole ty

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

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

It may not trip a fault current or degrade insulation after tripping. When you connect the device in reverse, you must s

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

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

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.

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FAQ within [ Molded Case Circuit Breakers ]

21-30 of Total 49

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Instantaneous tripping

It is a tripping zone which instantly trips, when significantly overcurrent such as short-circuit currents flow. More Details >>
- No：22363
- Release Date：2018/08/31 14:33
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
Max. operational voltage for AC/DC Common

When it is connected as special connection, AC/DC compatible circuit breaker can be used with DC 250V or more (3-pole type is DC400V and 4-pole type is DC500... More Details >>
- No：22445
- 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
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
Wrong connection in reverse

It may not trip a fault current or degrade insulation after tripping. When you connect the device in reverse, you must select a reverse-connectable model. More Details >>
- No：22345
- 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
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
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

21-30 of Total 49

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