Time Mark 421

RELAY, MONITOR, MONITOR, 421 MOTOR LOAD MONITOR CSA

This unit was designed to detect an overload or under-load condition on all types of running motors, conveyor motors, elevator motors, mixer motors, submersible pumps, suction pumps, etc. The monitor detects the actual power used (voltage x current x power factor) and is more sensitive than simple current monitors. It can be used with single-phase motors, or using the Model 276C Current Transducer, with three-phase motors. Matching CTs allow it to be used with virtually any size of motor. Trip and restart delays are provided, one or both can be turned on or off.