Siemens Industrial Controls MT0100A Transformer 320074-702 the internal windings or thermal

the internal windings or thermal fuse have likely failed and the unit must be replaced

Flexible Monitoring: Features multiple tap positions that can be plugged or used for taking critical inlet and outlet pressure readings

or audible humming from the internal solenoids indicating an electrical failure in the coils

you will need to swap the compression nut or use a reducer bushing

Siemens Industrial Controls MT0100A Transformer 320074-702 the internal windings or thermalThe Siemens MT0100A Transformer is a heavy duty industrial control power transformer engineered specifically for technical professionals managing motor control circuits and HVACR automation. As a foundational component in the Siemens Class MT lineup, this 100VA control transformer excels at stepping down high voltage supply to stable terminal power for contactors, relays, and timers. With a 240 480V primary input and a 120V secondary output, this