it constitutes controlling circuit of electrical motor with AC contactor and other switching apparatus. when abnormal working condition occured in the main circuit of electrical motor, such as phase failure,overload,block,3-phase imbalance,leakage and so on. the motor protector will make contacts of switching appratus swithed off immediately, disconnect 3-phase power of electrical motor to achieve result of motor protection quickly and safely. Main feature: 1. Type: HHD5-G, HHD5-1 2. Working power: 3-phase 380VAC 50Hz(HHD5-G); 220VAC 50Hz(HHD5-1) 3. Protect funciton: Over-pressure protect, under-pressure protect, phase-failure protect, phase sequence protect, voltage imbalance protect. 4. Display type: Working state is indicated by LED 5. Contact type: 1NO and 1NC(HHD5-G); 1NO (HHD5-1) 6. Contact capacity: 5A 380VAC(resistence)(HHD5-G); 20A, 32A, 40A(HHD5-1) 7. Outline size: 76x50x106mm(HHD5-G); 88x50x78mm(HHD5-1) 8. Mounting type: 35mm rail 9. Alternative product: XJ11