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·Note the optional power supply

1,When you purchase regulated power supply, it is recommended to choose at least three times greater than the actual power of the regulated power supply, because the regulated power supply in practical work need to overcome the impact of municipal power surges and inductive load start-shocks (such as refrigerators, air-conditioning, motors and electric motors).

When regulated power supply used in the inductive load regulator, due to inductive load having a greater instantaneous starting current, which is usually about 3-5 times than the rated current, often more than 9 times of the running current (such as refrigerators, air conditioners, washing machines, electric fans, large-scale air-conditioning, presses, air compressors, elevators, water pumps belong to the inductive load), so any distribution equipped by electric motors, compressors and other inductive load appliances regulator must take into account its power reserve and it also need to leave margin, it is necessary reserve enough margin to avoid the impact generated when the boot load current on the regulator causing immediate damage. If the whole plant use voltage regulator, starting the machine, should avoid high-power inductive load at the same time to start, so when you purchase regulator there should be 1.5 times the reserve capacity, the amount should be reserved for supporting stand-alone There are 3 times more.

2,Paying attention to the mains supply voltage value, whether the purchase exceeds the provisions of input voltage range, three-phase electrical voltage difference has more than 10V.

3, Before purching, we must consider the future business expansion, the need for additional equipment, regulators need to allow expansion of capacity, whether stand-alone package or the entire plant package. When choosing voltage regulator you should allow a certain amount of reserve capacity to avoid the regulator hundred percent of the load rate, regulator load rate is normally 90% of that ,which is more appropriate.