We offer Motor Protection Panel.

The UBZ-301 (Universal microprocessor based motor protection unit)is a new device that provides full and effective multi-fault protection (protection from all faults in the mains, motor performance-induced faults and internal fault conditions of motor) for 3-Phase AC motors by a magnetic starter (contactor) coil control. The unit is designed for the continuous monitoring of the mains voltage parameters and for RMS phase/line currents of 3-Phase AC 380V/50Hz electrical equipment monitoring, primarily, of induction motors that develop power from 2.5kWT up to 315 kW, isolated neutral system included. It offers a solution for an electric motor heat balance equation.

There are three separate modifications of the UBZ that cover three nominal current ranges: UBZ-301 5-50A; UBZ-301 10-100A;
UBZ-301 63-630A.

The unit isolates electrical equipment from the running system and/or disables its start:
when the mains voltage is of poor quality (unallowable voltage jumps, phase loss, incorrect phase sequence and phase coincidence, phase/line voltage imbalance);
when mechanical overloads (symmetrical phase/line current overload) take place. The unit performs overload protection with a dependent time delay;
when phase/line current asymmetrical overloads induced by faults inside the motor occur. The unit performs protection from phase current imbalance and further disables an automatic reset;
when phase current asymmetry without overload occurs that is induced by the insulation fault inside the motor and/or the power cable;
when motor load is lost ( dry stroke for pumps). The unit provides the minimum start and/or operating current protection;
when insulation level to frame is abnormally low. The unit performs insulation level test before start and if the insulation is poor the start is disabled.
when stator winding ground-to-fault occurs during operation. The unit performs the ground leakage current protection.

Contact us for more detail.