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

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

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

Each setting knob of the overcurrent trip characteristic is set to the maximum value and then shipped if not specified.

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

Use with 24V, 0.5A or more for AC and DC in normal use. If the breakers are used less than 24V, use with 6V, 1A or more.

It is possible to attach closely if there is no problem about the insulation distance between live parts such as a termi

It is not possible to use a circuit breaker for AC in DC circuit. Since the Arc-Extinguishing Device structure of circui

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FAQ within [ Molded Case Circuit Breakers ]

21-30 of Total 49

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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
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
Rear stud (B-ST) installed

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

Each setting knob of the overcurrent trip characteristic is set to the maximum value and then shipped if not specified. However, only the pre-alarm is set to... More Details >>
- No：22438
- 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
Minimum operating voltage

Use with 24V, 0.5A or more for AC and DC in normal use. If the breakers are used less than 24V, use with 6V, 1A or more. Moreover, regular inspection of is ... More Details >>
- No：22401
- Release Date：2018/08/31 14:33
Side by side installation

It is possible to attach closely if there is no problem about the insulation distance between live parts such as a terminal bar and load currents are 80% or ... More Details >>
- No：22400
- Release Date：2018/08/31 14:33
AC Breakers used at DC circuit

It is not possible to use a circuit breaker for AC in DC circuit. Since the Arc-Extinguishing Device structure of circuit breaker for DC is different from th... More Details >>
- No：22381
- Release Date：2018/08/31 14:33

21-30 of Total 49

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