... motor protection: overload, overcurrent, phase failure, over voltage etc. 2. measure volt, amp, watt, kwh 3. Modbus/Profibus Features:1. Use module ... protection, direct starter, reversing direct starter, star/delta starter, and autotransformer starter etc motor starting control modes. 5. Main module ... kwh)optionaloptional 380V electronic motor protection relay, motor protection device, motor controller