Profile: Motor Protection Electronics, Inc. is a manufacturer of industrial controls. Our product line includes phase & voltage monitors, duplex alternators, triplex /quad alternators, time delay relays, intrinsically safe controls, controllers, and level measurement components. Our 3 phase, medium case, phase monitor is connected to the phase monitor. The internal relay will be energized, and the LED will come on steady. An abnormal condition will cause the LED to blink during the trip delay. When the trip delay has expired, the internal relay will be de-energized. The LED will then provide a series of pulses that indicate which fault condition is present. When conditions return to normal, the LED will blink during the reset delay. When the reset delay has expired, the LED will come on steady, and the internal relay will be energized. The reset delay is also active immediately after power is turned on to the unit. Our over & under voltage monitor is used to protect single phase equipment that is required to operate between two voltage limits. In a normal voltage environment, the internal relay will energize and the LED will illuminate, allowing normal operation. Abnormal voltage conditions will cause the internal relay to de-energize, and the LED to turn off.