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FAQ within [ Molded Case Circuit Breakers ]
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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
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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
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Switch disconnector is a switch compatible with IEC 60947-3 standard, and it has no overcurrent tripping element. Please use it as a switch with large switch... More Details >>
- No:22379
- Release Date:2018/08/31 14:33
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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
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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
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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
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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
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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
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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
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Large electromagnetic force will be generated between conductors/wires due to fault currents. To prevent deformation and breakage of circuit breakers and con... More Details >>
- No:22424
- Release Date:2018/08/31 14:33
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