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The main difference between UPS and EPS power

UPS is the abbreviation of UninterruptiblePowerSupply we often said UPS uninterruptible power supply. UPS power supply common market line (OnLine) and reserve (OffLine) two.

    EPS emergency power system the abbreviation of EmergencyPowerSupply, and emergency power supply to meet the special requirements of the fire service industry.

    Backup UPS directly when the mains is normal municipal electric power to the load, beyond the scope of its work when the mains or power outage, the transfer switch into battery inverter power supply. Which is characterized by: simple structure, small size, low cost, but the narrow range of input voltage, output voltage stabilization accuracy, switching time, and the output waveform is generally square wave

    Second, the line-interactive UPS mains is normal municipal electric power to the load when the utility power is low or high output by UPS internal regulated voltage regulator circuits, when abnormal mains or power outage, transfer switch into battery inverter power supply. Its characteristics are: wide input voltage range, low noise, small size and other characteristics, but there are also switching time.

    Online UPS in the mains is normal, by the mains is rectified to provide DC voltage to the inverter to provide AC power from the inverter to the load, the energy supplied by the battery when mains abnormal inverter, inverter is always in working condition, to ensure uninterrupted output. Which is characterized by extremely wide input voltage range the basic switching time and output voltage stability and high precision, especially suitable for higher power requirements of the occasion, but the cost is higher. Currently, the power is greater than a 3KVA the UPS almost all of the online UPS.

    UPS have voltage regulation, filtering and other functions at the same time, some UPS can change mains bypass supply failure or overload.

    Greater fluctuation between 170V-260V, conversion between the high-speed relay mains and battery the reserve-voltage output, the conversion time of less than 10 milliseconds. -Line has always been to use the inverter circuit, the voltage stability, basically in the range of 220V ± 5% of the battery basic conversion time; and mains bypass converted using static switch can achieve microsecond conversion time level.

    UPS output high precision, fast conversion time, while the higher cost (approximately EPS twice), usually the energy consumption (online), host the short-lived (8-10 years).

    EPS is somewhat similar to the reserve-UPS inverter usually does not work, only put into the battery of a mains failure. Generally not power constant current, constant voltage processing. Usually contactor conversion, switching times are 0.1 ~ 0.25S. The advantage of the structure is relatively simple, low cost, usually no noise low energy consumption, the hosts long life (15-20 years), and can be adapted to the inductive, capacitive load, frequency conversion soft start when needed.

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