Ⅰ. UPS power supply scientific operating procedures
1. The location of the UPS power supply should avoid direct sunlight, the ambient temperature should be around 25°C, and leave enough ventilation space to keep it clean; at the same time, it is forbidden to connect inductive loads to the output port of the UPS power supply.
2. When using UPS power supply, you must abide by the relevant regulations of the UPS power supply manufacturer’s product manual, and ensure that the live wire, neutral wire, and ground wire connected meet the requirements, and users are not allowed to change their mutual order at will.
3. Work in strict accordance with the correct start-up and shutdown sequence to avoid the UPS power supply from not working properly due to large fluctuations in the voltage output of the UPS power supply when the load is suddenly added or unloaded.
4. It is forbidden to turn off and on the UPS power supply frequently. It is generally required to wait at least 6 seconds before turning on the UPS power supply after turning off the UPS power supply. Electric output, and no state of inverter output.
5. It is forbidden to use overload. UPS power supply manufacturers strongly recommend that the maximum starting load of the UPS power supply should be controlled within 80%. If overloaded, the inverter triode will often be broken down in the inverter state. Practice has proved that: for most UPS power supplies, controlling its load within the range of 30% to 60% of rated output power is the best working method.
6. Regularly maintain the UPS power supply, remove the dust in the machine, measure the voltage of the battery pack, replace unqualified batteries, check the operation of the fan and test and adjust the system parameters of the UPS, etc.
Ⅱ. Matters needing attention when using UPS power supply
1. Observe the display control operation panel of the UPS main unit on site, and confirm that all the graphic display units on the LCD display panel of the UPS power supply are in normal operation, all the operating parameters of the power supply are within the normal range, and there is no failure in the displayed records and alarm information.
2. Check whether there are obvious signs of overheating.
3. Observe the load and backup time of the UPS power supply. If there is any change, check whether there is an increase in load, the current operation of the load, and whether there is an unknown fault in the load.
4. Pay attention to whether there are suspicious changes in the sound noise, and pay special attention to the sound of the input and output isolation transformers of the UPS power supply. When there is an abnormal “squeak” sound, there may be poor contact or poor insulation of the inter-turn winding. When there is a low-frequency “cymbal sound”, the transformer may have a biased magnetic phenomenon.
5. Make sure that there is no blockage in the air filter of the fan.
6. When the output voltage of the UPS power supply is found to increase abnormally, check whether the filter capacitor of the UPS power supply is intact.
If possible, record the above inspection results and analyze whether there are any obvious deviations from normal operation.