In daily maintenance, a conductivity meter can be used to test the internal resistance of the battery to judge whether it is good or bad. The battery life of the inverter is an important reason that affects the inverter failure.

Pay attention to the life span of the valve-regulated sealed lead-acid battery of the inverter, and stop the replacement of the battery pack that has expired in time, so as to ensure the reliability of the backup power supply and prevent the battery pack from affecting the entire communication DC The operation of the power supply.

　　① When the power supply system is faulty, first find out the cause, and distinguish whether it is the load or the power supply itself, the rectifier or the battery pack. The input and output main circuit of the high-frequency switch rectifier module has input overvoltage and output current limiting maintenance, so the possibility of failure is relatively small. The internal control circuit, display circuit, maintenance circuit, etc. have relatively more problems, and these Only one component in the circuit is faulty, which may cause the rectifier module to stop working. When dealing with these faults, you only need to replace the faulty circuit board to remove the fault. During the maintenance work, the author once encountered that the high-frequency switching rectifier appeared normal after being energized, and the measured output voltage was normal, that is, it could not carry the load. After inspection, it was found that the internal control circuit board problem caused the module to fail to work normally.

②When the high-frequency switch rectifier module shows faults such as a blown fuse, you must not directly stop changing the fuse and turn on the power again, otherwise the same faults will occur one after another. Not only will the fault not be checked, but it may also be incurred at the moment of booting. The scope of the problem has expanded. When dealing with emergency faults in the field, the rectifier can be replaced by the whole machine to remove the faults of the communication DC power supply, but when the rectifier is changed, the communication DC power supply system must not stop the power supply to the communication equipment.

③When communication equipment is connected to the DC distribution branch output switch, pay attention to the capacity of the total power input switch on the communication equipment shall not be greater than the switching capacity of the DC distribution branch output it is connected to, otherwise it will cause a skip switch. It may cause problems in the communication DC power supply system.

       Facing the rapid development of power communication, it is particularly important to do a good job in the maintenance of power communication DC power supply. I believe that with the efforts of all power communication personnel, the operation and maintenance experience and degree of power communication DC power supply will be summarized and improved from time to time, so that power communication power supply can be Provide a higher quality and reliable power supply guarantee for the rapid development of power communications.