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Molded Case Circuit Breakers NF
Low-voltage Power Distribution Products
MOLDED CASE CIRCUIT BREAKERS NF

The main circuit breaker for buildings and factories

We have prepared the optimal products for overload and short-circuiting protection for low voltage circuits.

Our latest WS-V Series of breakers is a range of products with wide variation that has been designed to maximize the ease of use, including with the "F Style" with compact external dimensions.


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 Types of Low-voltage Circuit Breakers

The following IEC Standards apply to low-voltage circuit breakers.
There are multiple product standards for the same type of device.
The standards system applies to industrial use (a skilled person handling the device) and household use (a person handling device has no experience.)

Typical
abbreviation

IEC standard

Mitsubishi Models

MCCB,
ACB

IEC 60947-2

Low-voltage switchgear and control gear - Part 2:
Circuit-breakers

NF type low-voltage circuit breaker
AE type low-voltage air circuit breaker

ELCB

IEC 60947-2
Annex B

Low-voltage switchgear and control gear - Part 2:
Circuit-breakers Annex B: Circuit-breakers incorporating residual current protection

NV type earth leakage circuit breaker

MCB

IEC 60898-1/-2

Circuit-breakers for overcurrent protection for household and similar installations

BH-D, BHW-T type miniature circuit breaker

RCCB

IEC 61008-1

Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs)

BV-D, BVW-T type earth leakage circuit breaker

RCBO

IEC 61009-1

Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs)

BV-DN type earth leakage circuit breaker

CBE

IEC 60934

Circuit-breakers for equipment

CP type circuit protector

·         ACB: Air Circuit Breaker

·         MCCB: Molded Case Circuit Breaker

·         ELCB: Earth-Leakage Circuit Breaker

·         MCB: Miniature Circuit Breaker

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