Ten skills that should be paid attention to in the use and maintenance of UPS power supply

UPS power supply, namely uninterruptible power supply, is a constant voltage and constant frequency uninterruptible power supply with energy storage device and inverter as the main component. UPS power supply plays an important role in protecting your data and equipment from damage. Therefore, it is very important to use and maintain UPS correctly. Many users are limited to the precautions in the product manual. In fact, proper maintenance and use of UPS need to run through the entire life cycle of UPS. In order to ensure its normal operation and prolong its service life, the following aspects should be paid attention to in use and maintenance: 1. It is very important to choose the installation location reasonably. A good installation location is very important. The place where the UPS is placed must have a good ventilation effect, and it should be kept away from water, For flammable gases and corrosives, the ambient temperature should be kept between 0°C and 40°C. If it is disassembled and used at low temperatures, water droplets may condense. Once the ambient temperature exceeds 25 degrees, the battery life will be shortened by half for every 10 degrees increase. At present, the batteries used in UPS are generally maintenance-free sealed lead-acid batteries, and the design life is generally 5 years. The UPS power supply should not be placed on its side. Keep the air inlet and outlet unobstructed; when the load is connected to the UPS power supply, the load must be turned off and then wired, and then the load must be turned on one by one. It is strictly forbidden to connect inductive loads such as electric motors and copiers to the UPS to avoid cause some damages. When connecting the UPS to a special socket with an overcurrent protection device, the power socket used should be connected to the protective ground terminal; regardless of whether the input power cord is plugged into the mains socket, the UPS output may be live. To make the UPS have no output, turn off the switch first, and then cancel the mains supply. 2. Skills for charging for the first time After purchasing a new UPS power supply, insert the UPS into the 220V mains power grid and charge it for at least 12 hours to ensure that the UP battery is fully charged. Otherwise, the actual available capacity of the battery will be much lower than the nominal capacity of the battery. If the UPS power supply is not used for a long time. It should be turned on for 24 hours every 2 to 3 months to allow it to be fully charged, and the UPS power supply should be in the inverter working state for 2 to 3 minutes to ensure the normal life of the battery. Once the UPS power supply is connected to the mains, it will start to charge the battery pack. Press and hold the power button for more than 1 second to turn on the inverter to turn on the inverter. 3. UPS can not be left idle for a long time. Excessive discharge of the battery and long-term open circuit of the battery can increase the internal resistance of the battery and deteriorate the charge and discharge performance. For UPS power supplies that have not been used for a long time, before restarting, let the UPS power supply use the charging circuit in the machine to charge for 12 hours before connecting to the load. For backup UPS power supplies, it is best to keep the UPS power supply in the inverter every other month. Work in the state for 2 to 3 minutes to activate the battery. In addition, it is necessary to strictly control the charging current of the battery not to exceed the maximum allowable charging current of the battery. Because the excessive charging current will shorten the service life of the battery. 4. The correct startup and shutdown sequence when using the UPS The correct startup and shutdown sequence should be to turn on the UPS to supply power first, and then turn on the various loads, so as to avoid the damage caused by the instantaneous current impact on the UPS during startup, and the sequence when shutting down On the contrary, you should turn off each load first and turn off the UPS last. When the utility power is interrupted by the UPS, you should save your data and information as soon as possible and then turn off the computer, otherwise the use of UPS power for work may cause the UPS to over-discharge, thereby shortening the service life of the UPS. 5. Avoid overload when using the UPS. When using the UPS, you must also calculate the size of the load. To avoid the load being too large or too small, too large a load will make the UPS work in an overload state for a long time and shorten the service life of the UPS; if the load is If it is too small, the working circuit of the UPS will work in an abnormal state for a long time, which is also harmful to the UPS. A reasonable load should be controlled between 50% and 80%. Practice has proved that the UPS output load control is the best at about 60%, and the reliability is the best. When the UPS is overloaded or the inverter fails, it will switch to bypass mode. At this time, the UPS does not have a backup function, and the power supply used by the load is directly supplied through the power system. 6. The use of AC voltage stabilizer After using UPS power supply, there is no need to add an AC voltage stabilizer. If it must be added, it should be added to the front stage of the UPS, that is, the mains first passes through the AC voltage stabilizer, then the UPS, and then to the load. 7. There are skills in battery equalization charging. At present, the valve-regulated lead-acid battery (VRLA) used in many UPS power supplies has been called maintenance-free battery from the beginning. This gives users a misunderstanding. It seems that this battery is durable and complete. No maintenance is required. Under this misleading, many users have basically not carried out maintenance and management since they installed the battery. When the battery in the UPS power supply encounters the following conditions, the battery should be charged with equalization: When the over-discharge causes the terminal voltage to be lower than the rated voltage of the battery. For a 12V small sealed lead-acid battery, its discharge calibration voltage is 10.5V; for a 24V battery pack, its final discharge voltage is 21V; for a 96V battery pack, its discharge calibration voltage is 85V. The battery is not charged in time after discharging; the battery has not been used for a long time. The utility power is interrupted, and the continuous floating battery discharges nearly half the capacity of the battery. 8. Don't use diesel generators. UPS should not be powered by diesel generators, because the frequency is often sudden and unstable, which affects the normal operation of UPS.
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