UPS backup power supply, uninterruptible power supply, selection of UPS backup power supply, precaut

UPS, or uninterruptible power supply, is an uninterruptible power supply with an energy storage device. It is mainly used to provide uninterruptible power supply to some equipment that requires high power stability.

The working principle of the uninterruptible power supply is that when the power supply is normal, the UPS converts the input voltage of the power supply into the output voltage and outputs it to the load; when the power supply fails, the UPS automatically starts the internal energy storage device, converts the electric energy in the energy storage device into the output voltage, and outputs it to the load to ensure the normal operation of the load.

1. Precautions for use:

1). The installation environment of the UPS power supply should avoid direct sunlight, leave enough ventilation space, and keep the working environment temperature no higher than 25℃. If the working environment temperature exceeds 25℃, the battery life will be shortened by about half for every 10℃ increase in temperature.

2). It is not advisable to use high-power thyristor loads, thyristor bridge rectifiers or half-wave rectifier loads at the output end of the UPS power supply. Such loads are prone to burn out the inverter's final drive transistor.

3). Strictly follow the correct startup and shutdown sequence to avoid sudden increase or decrease in load.

4). Frequent shut down and start of UPS power supply is prohibited.

5). Overload is prohibited. The maximum starting load of UPS power supply is preferably controlled within 80%. If overload is used, the inverter transistor will often be broken down in the inverter state. It is not suitable to operate with excessive light load. In this case, the battery discharge current is too small to cause battery failure.

6). Regular maintenance of UPS power supply.

7). UPS power supply is more suitable for micro-capacitive loads, but not for inductive loads, such as air conditioners, motors, electric drills, fans, etc.

2. How to choose an uninterruptible power supply:

When choosing an uninterruptible power supply, the following aspects should be considered:

1). Output power of the power supply;

2). Output voltage of the power supply;

3). Output frequency of the power supply;

4). Output accuracy of the power supply;

5). Reliability of the power supply;

6). Controllability of the power supply;

7). Flexibility of the power supply;

8). Cost of the power supply.