1, the difference in the nature of the load
UPS power supply object is mainly computers and network equipment, the nature of the load is lower, the current provisions of the UPS power supply output power factor of 0.8. And the EPS power supply is mainly used for power supply emergency protection, usually the nature of the load is inductive or capacitive.
Some loads are required to be put into use after the power failure, all EPS power supply must be able to provide a large inrush current, usually required in the case of 120% of the load can continue to supply power for more than 10 minutes. The rated capacity of a UPS power supply is measured in KVA, and the rated capacity of an EPS power supply is measured in KW.
EPS power supply is mainly used for fire fighting loads and some of the switching time requirements are not high, but the need for continuous power supply of the equipment. UPS power supply is mainly used for computers, digital information systems, and other loads that require high quality of power supply.
2, the difference between the function
EPS power supply and UPS power supply have utility bypass and inverter circuit, but the EPS power supply only has a continuous power supply function, the inverter switching time requirements are not high, most of the EPS power supply also has a single battery detection function. eps power supply in the utility power interruption before the inverter output, the power supply utilization rate is high.
And UPS power supply generally emphasize its three major functions: frequency and voltage stabilization of utility power processing; switching time requirements of the equipment power supply; purify utility power. Daily focus on rectifier and inverter double conversion circuit power supply, power utilization is not high. But the UPS power supply is not only in the power outage inverter power supply, but also in the utility voltage deviation, surge and other abnormalities to provide stable power output, which is the EPS power supply does not have.
3, the difference in the field of application
In our country, EPS is mainly used for fire fighting loads and some of the quality of power supply requirements are not too high, but need to ensure that the continuous power supply of electrical equipment. Only emphasize the function of continuous power supply.
EPS is used for fire load, its product technology by the Ministry of Public Security fire certification. UPS power supply is generally used for computers and digital information systems and other occasions. Requirements for higher quality of power supply load, the main emphasis on the inverter switching time, output voltage, frequency stability, the purity of the output waveform, no interference of all kinds.
Baidu Encyclopedia-UPS Power Supply
Baidu Encyclopedia-eps power supply