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This article mainly analyzes the five major causes of premature failure of UPS power supply and the relevant knowledge points on how to prevent it. The content is detailed and easy to understand, and the operation details are reasonable, which has a certain reference value. If you are interested, you might as well follow the editor to have a look, and follow the editor to learn more about the five causes of premature failure of UPS power supply and how to prevent it.

UPS power failure is the main culprit behind most UPS disasters. Although the UPS power supply is easily damaged prematurely, users do not have to be victims. The following describes the five major causes of premature failure of UPS power supply and how to prevent such failure.

When the backup UPS power supply is normally supplied by the municipal power supply, the municipal power supply provides power to the load directly through the AC bypass channel and then through the conversion switch, and the inverter in the machine is in a state of stop operation. This kind of UPS power supply is essentially equivalent to a municipal power regulator with very poor voltage stability. In addition to improving the amplitude fluctuation of the city voltage, it basically does not improve the frequency instability, waveform distortion and interference from the power grid. Only when the municipal power supply is interrupted or less than 170V, the battery supplies power to the inverter of UPS and provides AC power with stable voltage and frequency to the load. The backup UPS power supply has the advantages of high operating efficiency, low noise and relatively cheap price, which is mainly suitable for the occasions where the fluctuation of municipal power is small and the quality of power supply is not high. What is the UPS power supply? what is the on-line UPS power supply? when the municipal power supply is normal, it first turns the municipal AC power supply into a DC power supply.

Factors leading to premature failure of UPS power supply and maintenance methods:

Nothing can be done to prevent the UPS power supply from reaching its service life. However, avoiding the following errors can help ensure service life.

1. Poor storage without UPS power supply-even if the UPS power supply is not in use, its life will begin to decrease. That's because the lead-acid UPS power supply automatically releases a small amount of energy.

To extend the storage life of the UPS power supply, it is recommended that you charge it every three to four months. If you do not do so, you may see permanent capacity loss in just six months. It is also possible to extend the service life of unused UPS power supplies by storing them at 50 °F (10 °C) or lower.

two。 Higher ambient temperature-the rated capacity of each UPS power supply is based on an ambient temperature of 25 °C (77 °F). Any change, especially an increase in temperature, will affect performance and service life. Typically, for every 15 °F increase in the recommended ambient temperature, the life expectancy of the UPS power supply is reduced by 50%. Routine maintenance checks can help identify hot spots and verify ventilation.

Whether the input voltage frequency range is wide, whether it has super lightning protection ability, whether the anti-electromagnetic interference ability has passed the certification, and so on, are all the functional indicators that need to be considered when selecting UPS. In the case of small capacity or local power supply, which functional indicators should be valued to choose UPS? When using small capacity or local power supply, we should first choose small capacity UPS, and then according to its requirements for power supply quality, we should choose on-line or backup UPS. The backup UPS has 500VAPM 1000VA, and online 1KVA to 10KVA is available for users to choose from. In the case of large capacity or centralized power supply, which functional indicators should be valued to choose UPS? In the case of large capacity or centralized power supply, large capacity three-phase UPS should be selected. And consider whether there is ① output short-circuit protection; ② can love unbalanced load; ③ has isolation transformer; ④ can do hot backup; ⑤ multi-language graphical LCD display; ⑥ can carry out remote monitoring; ⑦ has super monitoring software.

3. Excessive cycle-after the UPS runs on the UPS power supply during a power failure, the UPS power supply is charged for future use, which is called a discharge cycle. After installing the UPS power supply, the UPS power supply will reach 100% of its rated capacity. However, each discharge and subsequent charge slightly reduces the capacity of the UPS power supply.

4. Incorrect floating voltage-each UPS power supply manufacturer specifies a charging voltage range for its own UPS power supply design. If the UPS power supply continues to charge beyond these parameters, it may cause serious damage. Undercharging or low voltage can cause sulfate crystals to form on the UPS power board. Over time, these crystals will harden and reduce the available capacity of the UPS power supply. Too high floating charge voltage will lead to too much hydrogen and oxygen, and may lead to internal drying, once accelerated, internal drying will lead to thermal runaway, resulting in failure and even fire.

5. Incorrect use of UPS power supply-UPSUPS power supply is dedicated to UPS, just as other UPS power supplies are dedicated to their respective appliances. UPS power supplies can provide extremely high energy consumption in a short period of time (usually up to 15 minutes).

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