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

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

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

It is a characteristic that operating time inversely become shorter as current increases. For Molded Case Circuit Breake

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

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

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

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

It is overcurrent tripping characteristic zone which exceeds the rated current and does not exceed short time tripping z

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FAQ within [ Molded Case Circuit Breakers ]

21-30 of Total 49

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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
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
Plug-in type NF1600-SEW produced

It is impossible. More Details >>
- No：24817
- Release Date：2019/04/09 15:16
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
Inverse time delay operating characteristic

It is a characteristic that operating time inversely become shorter as current increases. For Molded Case Circuit Breakers, protection characteristic meeting... More Details >>
- No：22387
- 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
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
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
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
LTD operating characteristic

It is overcurrent tripping characteristic zone which exceeds the rated current and does not exceed short time tripping zone (If without short time tripping ,... More Details >>
- No：22384
- Release Date：2018/08/31 14:33

21-30 of Total 49

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