Mitsubishi Electric AE V Series C-class air circuit breakers

Mitsubishi Electric’s AE V Series C-class air circuit breakers (ACBs) offer a number of built-in features that reduce the need for multiple additional accessories, thereby also reducing the number of potential failure points. For example, when utilising the built-in solenoid for remote operation, the traditional motor charging devices and closing coils can be dispensed with as the breaker only requires an appropriately matched shunt trip device. This helps to eliminate additional parts that were previously required to achieve remote operation.

The overall unit design consolidates many points within the main breaker frame, reducing the number of required external devices. When options are required such as a shunt trip device or an undervoltage trip device, they can be quickly fitted into slots accessible by panel builders from the front of the breaker. This makes the panel quick to construct and also aids maintenance, as the accessories can be checked simply by removing the front cover.

Owing to the solenoid, maintenance processes can be reduced by 30% over existing models, the company claims. A built-in drawout handle on the front is meanwhile designed to make maintenance work easier. As the series can be ‘charged’ electronically via the solenoid, the charging noise is kept low and charging power can be reduced by 88% compared to spring-charge type ACBs using motor charging devices and closing coils.

Targeted at commercial facilities, factories and other buildings, the ACB series has a breaking capacity of up to 50 kA.