Gelco electronics pvt ltd offers motor guard relay, which is a current sensing single phasing preventer. It provides total protection to three phase ac electric motor. The main principle of operation is sensing negative sequence current components and it trips electric motor starter as soon as it exceeds the dangerous level. The model provides protections up to motor terminals and is un-defective to the motor back emf. Terre is two modes viz, mgr & mgr-c. These models are almost same with some subtle differences in features. These modes are supplied with overloading reverse supply, current unbalance and low/high voltage, auto/manual reset provision, etc. Polystyrene moulded with nylon moulded connection strip is used to make the enclosure. A green led indicates spp healthy condition and red led indicates overloading condition. These are available up to 200 a.
