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

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

A circuit breaker must have interrupting ratings. These are classified as rated short-circuit breaking capacities in IEC

First, turn OFF the upstream circuit breaker and the relevant circuit breaker. You must not work in the state where volt

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

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

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.

Basically you have to consider the effect of harmonic waves, but there are two ways as below. 1. Refer to the recommende

It means a space between the edge of a exhaust port and panel component ( such as wall or duct) of a circuit breaker. Th

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FAQ within [ Molded Case Circuit Breakers ]

1-10 of Total 49

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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
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
Interrupting ratings

A circuit breaker must have interrupting ratings. These are classified as rated short-circuit breaking capacities in IEC 60947-2.e rated ultimate short-circu... More Details >>
- No：22341
- Release Date：2018/08/31 14:33
Electronic MCCB 400-1600A How to change rated current and characteristic curve (Except CE breakers)

First, turn OFF the upstream circuit breaker and the relevant circuit breaker. You must not work in the state where voltage is applied to the relevant circui... More Details >>
- No：22439
- Release Date：2018/08/31 14:33
- Update：2018/08/31 14:35
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
lower limit of operational voltage for DC

It is DC 24V. More Details >>
- No：24816
- Release Date：2019/04/09 15:17
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
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
How to select at Inverter circuit

Basically you have to consider the effect of harmonic waves, but there are two ways as below. 1. Refer to the recommended rated current by inverter manufactu... More Details >>
- No：22360
- Release Date：2018/08/31 14:33
Arc space

It means a space between the edge of a exhaust port and panel component ( such as wall or duct) of a circuit breaker. The arc space is needed for smoothly di... More Details >>
- No：22373
- Release Date：2018/08/31 14:33

1-10 of Total 49

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