The voltage at your location is abnormal, which will make the computer automatically shut down and restart, reducing the efficiency of general household appliances, making it difficult to work normally, or even damaging them.
If your residence is a residential area, and the nearby voltage is low and unstable, you should work together to find the power supply department to solve the problem, such as increasing the capacity of the transformer, increasing the wire diameter of the power supply conductor, changing the single-phase power supply to three-phase power supply, and so on. This is reasonable. The national power supply rules and other laws and regulations have provisions,For example, the national standard "Power Quality - Allowable Deviation of Supply Voltage" (GB12325-90) stipulates that the allowable deviation of the power supply voltage at the user's receiving end under normal operation conditions of the power system is: (3)+5% - - 10% of the rated voltage for low-voltage lighting users.That is, 220 V+5% ～ - 10% is allowed.
As a temporary solution, if the voltage fluctuation is very regular with time, and it is not suddenly high and suddenly low, then a contact voltage regulator, also known as an autotransformer, can be equipped.For computers, 0.5kVA is enough. If you need to connect other household appliances, you can increase the capacity.Because household appliances and computers have low requirements for voltage stability, they can work normally at about 190~250V. If the voltage is too low to be adjusted, it can be reversed, that is, the output terminal of the voltage regulator is connected to the power supply, and the power supply terminal is connected to the load. At ordinary times, the voltage regulating pointer should be placed near 220V, and the voltage should be adjusted in the direction of small indication to increase the voltage.Connect a voltmeter to monitor the voltage fluctuation.According to your situation, the voltage is always low, and you should keep it in a high state, such as 220 to 235 volts, to cope with the voltage drop.This is economical and not inconvenient.For your reference.
