ACB Ground fault protection

Ground fault protection (GFR) is prepared as option, it is possible to detect and protect against ground fault current. "Trip" or "Alarm signal output" can b... More Details >>

MCCB Reverse connection

Almost MCCBs can be connected n reverse. Check the item column of specification table "reverse connection" in the catalog. If it says "Possible", MCCB can be... More Details >>

ACB　General use Generator protection...

General protection relay (WS) of AE-SW type Air Circuit Breaker has tripping characteristic and function for general use. However, we also provide the replay... More Details >>

ELCB High-sensitivity

It is the Earth Leakage Circuit Breaker with rated residual operating current of 30mA or less. More Details >>

ELCB Default setting Time-delay type ...

Both of the adjustment knob is set to the maximum value when shipping in order to prevent unwanted earth leakage tripping when Earth Leakage Circuit Breaker ... More Details >>

3P ELCB single phase use

It is possible to use it if you connect with right and left poles, not neutral pole. Since electronic circuit power supply for earth leakage detection is tak... More Details >>

Select rated current sensitivity

Please select rated current sensitivity ,according to the protection purpose and the protective grounding resistance value of the load equipment. If you alre... More Details >>

Short circuit current calculation sof...

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

PAＬ（Pre-Alarm Module）

This function is equipped in electronic circuit breaker. It outputs an alarm when pre-alarm current setting current (the rated current or less) is over and l... More Details >>

IEC60947-2 standard

IEC 60947-2 is an international standard for circuit breakers. The rated voltage for the applicable circuit breaker is 1000V AC or less, or DC 1500V DC or le... More Details >>