400100 , MOC-1 Motor Overload Control

Quote
Voltage 120 V
Motor Up to 3 hp
Range -15% + 10%
Phase Single
Chassis YES
Features Monitors 1/8-3 HP DC motors.120 or 240 VAC control power.Three DPDT alarm (over load) contacts rated for 120/240 VAC
    The MOC-1 monitors motor load and provides a latched "alarm" contact if an overload occurs. An adjustable time delay allows the MOC-1 to ignore normal acceleration currents without nuisance tripping. The MOC-1 is frequently used to shut down an overload system before motor or machine damage can occur.