Almost MCCBs can be connected n reverse. Check the item column of specification table "reverse connection" in the catalo

It is forbidden to change the characteristic when the breaker ON. Over current trip and earth leakage trip characteristi

Operating ambient temperature is set to - 10℃ to 40℃. ( However, its average over a period of 24h does not exceed 35℃.)

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

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

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

No, you must not use 2-pole circuit breaker as 1-pole circuit breaker (series connection as only single phase ). If usin

It is possible. Refer to the figure for connection as below.

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

In order to prevent breakdowns and human injuries, it is necessary to select a control device having protection structur

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FAQ within [ Molded Case Circuit Breakers ]

11-20 of Total 49

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MCCB Reverse connection

Almost MCCBs can be connected n reverse. Check the item column of specification table "reverse connection" in the catalog. If it says "Possible", MCCB can be... More Details >>
- No：22442
- Release Date：2018/08/31 14:33
Setting change operation while power is on

It is forbidden to change the characteristic when the breaker ON. Over current trip and earth leakage trip characteristics should be changed by a person with... More Details >>
- No：37699
- Release Date：2020/01/18 09:58
Use in 40℃～60℃

Operating ambient temperature is set to - 10℃ to 40℃. ( However, its average over a period of 24h does not exceed 35℃.) In the case that the ambient temperat... More Details >>
- No：22370
- Release Date：2018/08/31 14:33
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
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
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
2P MCCB only 1-pole use

No, you must not use 2-pole circuit breaker as 1-pole circuit breaker (series connection as only single phase ). If using it as 1-pole circuit breaker, these... More Details >>
- No：22382
- Release Date：2018/08/31 14:33
3P MCCB in 1-phase 2-wire circuit

It is possible. Refer to the figure for connection as below. More Details >>
- No：24811
- Release Date：2019/04/09 15:18
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
Degree of protection

In order to prevent breakdowns and human injuries, it is necessary to select a control device having protection structure suitable for each purpose. The prot... More Details >>
- No：22443
- Release Date：2018/08/31 14:33

11-20 of Total 49

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