Motor Guard Relay
Description: Motor Guard Relay is a current sensing single phasing preventer, which gives total protection to three phase AC electric motor. This relay senses the negative sequence current components and thereby trips electric motor starter as soon as it exceeds the dangerous level. This model offers protections up to motor terminals and is immune to the motor back emf. The motor guard relay is been offered in two different model-MGR and MGR-C. These two models differ in terms of under/over voltage protection and inverse time current characteristic setting. These models are provided with features like overloading (inversely time current characteristics) reverse supply, current unbalance and low/high voltage and auto/manual reset. The enclosure is made from high impact polystyrene molded with nylon molded connection strip. The green LED indicates healthy condition and red LED indicates overloading condition. Both models offer single phasing protection even if motor is on no load.
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