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Circuit breakers for transformer protection

Fuseless protection on the primary side

Circuit breakers for transformer protection are specially designed to protect control transformers on the primary side fuseless against overloads and short-circuits. In addition, the device allows manual connection and disconnection of the transformer from the mains.

MS132-(K)T is a 45 mm (width) compact and powerful range up to 12.5 kW (400 V) / 25 A. This type has also a clear and reliable indication of fault in a separate window in the event of short-circuit tripping. Further features are the build-in disconnect function, temperature compensation, trip-free mechanism, and a rotary handle with a clear switch position indication. The handle is lockable to protect against unauthorized changes.

Auxiliary contacts, signaling contacts, undervoltage releases, shunt trips, power in-feed blocks are available as accessory. These are suitable for the complete MS116/MS132/MS165-range. Moreover, ABB offers special accessories for fast single-phase setup.

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