The method of prolonging the life of ups - APC

There are many ways to extend the life of UPS power supply, which are mainly related to the battery inside. Here are some simple and easy tips.

1. Use of AC voltage regulator: after using UPS power supply, it is unnecessary to add AC voltage regulator. If it must be added, it shall be added to the front level of UPS power supply, that is, the mains power shall pass through AC voltage stabilizer first, then UPS power supply, and then load.

2. Avoid overload using APC When using UPS power supply, the official website of UPS power supply shall also calculate the load size to avoid too large or too small load. Too large load will make UPS power supply work in overload state for a long time and shorten the service life of UPS power supply; if the load is too small, the working circuit of UPS power supply will work in abnormal state for a long time, which is also harmful to UPS power supply. Reasonable load should be controlled between 50% and 80%. It has been proved that the output load control of UPS is the best and the reliability is the best. When the UPS power supply is overloaded or the inverter fails, it will switch to the bypass mode for operation. At this time, the UPS power supply does not have the backup function, and the power used by the load is directly supplied through the power system.

3. Try not to operate under overload: try to operate within the range lower than the rated power, because overload power operation will not only affect the product life of the load, but also affect the life of the UPS power supply. In general, the load of On-line UPS should be controlled at 70% - 80%, and the load of standby UPS should be controlled at 60% - 70%. Note that over light load is not good, although it is not as serious as overload.

4. Do not use diesel generator: UPS power supply should not be powered by diesel generator, because its frequency is often sudden and unstable, affecting the normal operation of UPS power supply.

5. Power on and power off sequence when using UPS power: the correct power on and power off sequence should be to turn on APC first The UPS power supply official network supplies power to it, and then turns on each load, so as to avoid the damage caused by the instantaneous current impact on the ups during startup. When the power is turned off, the sequence is just the opposite. First turn off each load, and then turn off the ups. When the power supply is interrupted by the ups, save your data and data as soon as possible, and then turn off the computer, otherwise the UPS power supply may be used for work Make UPS over discharge, so as to shorten the service life of ups.

6. First time charging skill of UPS power supply: after the new purchase of UPS power supply, the UPS power supply shall be inserted into the 220 V municipal power grid for charging for at least 12 hours to ensure that the battery is fully charged. Otherwise, the actual available capacity of the battery will be much lower than the nominal capacity of the battery. If UPS power supply is not used for a long time. It shall be started for 24 hours every 2-3 months to make it fully charged, and the UPS power supply shall be kept in the inverter working state for 2-3 minutes to ensure the normal life of the battery. Once the UPS power supply is connected to the mains, the battery pack will be charged. Press the power on button for more than 1 second to start the ups, and then the inverter will be turned on.

7. UPS power supply shall not be idle for a long time: excessive discharge and long-term open circuit idle of the battery can increase the internal resistance of the battery and deteriorate the charging and discharging performance. For long-term unused UPS power supply, before restart, let the UPS power supply use the charging circuit in the machine to charge for 12 hours and then connect the load. For backup UPS power supply, it is better to keep the UPS power supply in the inverter state for 2-3 minutes every other month to activate the battery. In addition, the charging current of the battery shall not exceed the maximum charging current allowed by the battery. Because too much charging current will shorten the service life of the battery.

8. Battery management skills at present, many VRLA batteries used in UPS power supply have been called maintenance free batteries from the beginning, which gives users a misunderstanding. It seems that such batteries are durable and do not need maintenance at all. Under this kind of misleading, many users haven't been maintained and managed since they installed the battery. When the battery in the UPS power supply encounters the following conditions, the battery shall be charged evenly: when the terminal voltage is lower than the rated voltage specified by the battery due to excessive discharge. For 12V small sealed lead-acid battery, the discharge calibration voltage is 10.5V; for 24V battery, the end discharge voltage is 21V; for 96V battery, the discharge calibration voltage is 85V. The battery is not charged in time after discharge; the battery is idle for a long time. The battery with continuous floating charge and power interruption will discharge nearly half of its capacity. In view of this situation, Burke has developed a battery automation management software to effectively solve the problem;

① Battery automatic management software: charge and discharge the battery once every 3-4 months when the mains supply is normal, discharge 20%, automatic switch of equalized charge and floating charge, fully activate lead-acid molecules, greatly extend the battery life. Our factory makes a test battery discharge 20%, 80% of which can be discharged 1500-2500 times, and 100% of which can be discharged 10.5V. The battery can only be discharged 300 times, and the service life will be terminated;

② During the discharge, each battery group is detected constantly, the voltage, current and temperature of each battery are monitored, and the battery voltage is adjusted according to the battery temperature for compensation;

③ Battery discharge record log to prevent battery failure diagnosis;

④ The charging current is 0.1C, and the current can be set from 1 to 100A.

9. Good real-time monitoring: at present, the intelligent UPS power supply has the operational performance characteristics such as communication with microcomputer and program control. Install the corresponding software on the microcomputer, connect the UPS power supply through the serial / parallel port, run the program, and then use the microcomputer to communicate with the UPS power supply. General information search