Regulators Order details: first. Make sure your electricity voltage is 220V or 380V second. You need to reach the regulator to determine the effect of total power, and then select the size of the regulator specify: purely resistive load such as incandescent, resistance wire, electric furnace and other equipment, select regulator power should load devices 2 times, such as electric power is 250W more than you need to select 500KVA regulator inductive and capacitive loads such as fluorescent lamps, fans, motors, pumps, air conditioners, refrigerators and the like. Select regulator power to the load equipment should be three-fold. Such as a motor power of 1kw so Regulators should choose more than 3000KVA. If you are unsure, it is recommended more than three times in accordance with the criteria to select the size of the regulator.