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.