... 4.three phase current unbalance BBW- /3.3(1.2,0.66,0.4) Mining explosion-proof reactive power compensation devicePurpose It ... , no level of reactive power compensation, stable bus voltage.2. Real-time display system power factor, bus voltage and the ... . Overvoltage, under voltage protection. Technical Data Rated Voltage 3.3kv/1.2kv/0.66kv 0.4kvRated Capacity 50kvar-2000kvarcompensated power factor to ...