The power supply time of UPS is first related to the capacity of UPS. The larger the capacity, the longer the power supply time. Secondly, it is related to the number of electrical equipment connected by UPS. The greater the power consumption, the shorter the time.
UPS power supply time calculation method: (battery capacity x battery working voltage)/equipment power = extendable time (hours). The standby time of UPS is determined by its energy storage device. At present, UPS generally adopts fully sealed and maintenance-free lead-acid batteries as energy storage devices.
The battery capacity is reflected by the index of "Ampere-hour (AH)", that is, the discharge time according to the specified current. The battery with the same voltage has large ampere-hours and large capacity; A battery with the same ampere hour has a large capacity when the voltage is high. Generally, the battery capacity is based on voltage and ampere hour * * *, such as 12v/7ah, 12v/24ah, 12v/65ah,12v/kloc-0.
Generally, standby UPS has built-in 4AH or 7AH batteries, and the standby time is fixed. Online and online interactive UPS has standard models with built-in 7AH batteries and long-term models with large-capacity batteries. Users can determine the battery capacity according to the required standby time.
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Matters needing attention in using UPS power supply:
1, try not to pick up inductive load. Because the starting current of inductive load often exceeds 3 ~ 4 times of rated current, it will cause instantaneous overload of UPS and affect its life. Inductive loads include electric fans and refrigerators commonly used in summer.
2, unfavorable full load or light load. Don't use it according to the rated power of UPS, and don't think that an empty interface should not be idle and connected to other appliances. Long-term full load will directly affect the life of UPS.
3. Under normal circumstances, the load of online UPS should be controlled at 70% ~ 80%, and the load of standby UPS should be controlled at 60% ~ 70%. Note that a light load is not good either, although it is not as serious as an overload.
4. Protect the battery.