Littelfuse 355 MotorSavers

Littelfuse SymCom 355 MotorSaver Protection Relay is a 3-phase voltage monitor and is perfect for heavy-duty applications that need both protection and diagnostics while the motor is shut down. Applications include rural pump panels, commercial HVAC equipment, oil rigs, and rural HVAC equipment.

The Model 355 is a versatile voltage monitor designed for 200, 400, or 480VA applications:
The Model 355-200 will monitor 190-480VA input voltages.
The Model 355-400 monitors 380-480VA input voltages
The Model 355-600 monitors 575 to 480VA input voltages.