The 460-100-SP is used on 95 to 120 VAC, 50/60 Hz 1-phase motors and the 460-200-SP is used on 190 to 240 VAC, 50/60 Hz 1-phase motors to protect them from damaging high and low voltage conditions. An adjustment knob allows the user to set a 1 to 500 s restart delay. The variable restart delay is also a power-up delay and can be utilized to stagger start motors on the same system. A unique microcontroller based, voltage sensing circuit constantly monitors the voltage to detect harmful power line conditions. When a harmful condition is detected, the MotorSaver® output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to an acceptable level and a specified amount of time has elapsed (restart delay). The trip delay prevents nuisance tripping due to rapidly fluctuating power line conditions.