The principle operating of our Microprocessor motor, phase protection & liquid level relay is based on the controlling phase range as well as it trips the relay at the position OFF when a fault occurred.

It protects system against phase sequence fault and detects frequency of system. It measures voltage of each phase against the neutral. If it detects any deviation which is given among the tolerance,it trips the relay, depending on the duration of the adjustment. Meanwhile, it gauges liquid level by means of probs and protects the system against the liquid level fault. If it detects the liquid level under the predetermined level, it will trip the relay at the OFF position. When liquid level reaches the predetermined level, it releases the relay at the on position.