The ABB 1SVR450330R0000 is a CM-LWN motor load monitor with two changeover contacts (2x1c/o). It monitors motor load current and provides alarm or control signals when the load deviates from the setpoint.
The 2x1c/o contact arrangement gives you two independent sets of changeover contacts — one can trigger an alarm, the other can initiate a controlled shutdown or feed a PLC input. This is typical for motor protection schemes where you need separate signal paths for warning and trip.