Precision manufacturing industries, especially manufacturing complicated power supply, load many types, from office automation, IT equipment, to industrial equipment, the demand for power are not the same. Icon is described in an example of a manufacturing industrial power supply scheme. Electricity and the generator as the system’s total power input ATS switching system. Low-voltage distribution system to obtain electricity from the ATS system, while precision air-conditioning, comfortable and air-conditioning load also needs to obtain energy from the low voltage distribution system. Large enterprises have a considerable degree of office automation and information systems, recommended the use UPS and stand-alone computer system or on important IT equipment power. For companies in the industrial equipment, recommended a separate UPS system its power. As shown UPS1 office automation equipment, power supply to the enterprise, and UPS2 power to industrial equipment. UPS backup systems both time requirements and the form of backup power are not the same. UPS2 may need to configure a separate generator to obtain a longer delay. Large enterprises is also essential fire fighting system, EPS system is recommended to be protected. Lighting type EPS and ensure that fire lighting, power-type EPS and ensure that fire pumps, elevators and other equipment.