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

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

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

If switching of neutral pole is not needed, it is possible to use 3-pole MCCB for 3-phase 4- wire circuit. Generally, it

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

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

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

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

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

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FAQ within [ Molded Case Circuit Breakers ]

21-30 of Total 49

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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
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
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
MCCB 3P4W 3P use

If switching of neutral pole is not needed, it is possible to use 3-pole MCCB for 3-phase 4- wire circuit. Generally, it is recommended to use 4-pole circuit... More Details >>
- No：22385
- 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
Rear stud (B-ST) installed

B-ST is possible. More Details >>
- No：24814
- Release Date：2019/04/09 15:17
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
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
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
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

21-30 of Total 49

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