The main feature of an uninterruptible power supply (UPS) is that it provides instantaneous or near-instantaneous power interruption protection. Maintaining power is a vital role for uninterruptible power supplies.
Generally, UPS systems are used in data centers, computer systems, and some medical applications that are critical to power continuity. But for the safe use of uninterruptible power supply, there are also many precautions. I have sorted out the following reasons and hope that you can help when using uninterruptible power supply!
After purchasing a new UPS power supply, insert the emergency power supply into the 110V （U.S. region）mains power grid and charge it 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 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 utility power, it will start to charge the battery pack. Press the power button for more than 1 second to turn on the inverter to turn on the inverter.
A good installation location is very important. The place where the emergency battery power backup is placed must have good ventilation, keep it away from water, flammable gases, and corrosives, and keep the ambient temperature between 0-40℃. There is the condensation of water droplets. 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 the UPS power supply 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, wired, and then turned on one by one. It is strictly forbidden to connect inductive loads such as electric motors and copiers to the UPS power supply. So as not to cause harm. When connecting the battery backup system to a special socket with an over-current protection device, the power socket used should be connected to the protective earth terminal; regardless of whether the input power cord is plugged into the mains socket, the UPS power output may be live. To make the UPS power supply no output, you must first turn off the switch and then cancel the mains supply.
The correct startup and shutdown sequence should be to turn on the UPS power supply first and then turn on each load, to avoid the damage to the UPS caused by the instantaneous current impact during startup. The order when shutting down is exactly the opposite. You should turn off each load first and then turn off the load. UPS. When the utility power is interrupted by the back 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 back UPS to over-discharge, thereby shortening the service life of the UPS, UPS power protection is very important!
Excessive discharge of the battery and long-term unused use of the battery can increase the internal resistance of the battery and deteriorate the charge and discharge performance. For the power battery backup 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.
After using the 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 power supply, that is, the city power first passes through the AC voltage stabilizer, then the UPS power supply, and then to the load.
When using UPS power supply, it is necessary to calculate the size of the load. It is necessary to avoid the load being too large or too small. Excessive load will cause the UPS power supply to work in an overload state for a long time and shorten the service life of the UPS power supply; if the load is too small, The working circuit of the UPS power supply works in an abnormal state for a long time, which is also harmful to the UPS power supply. A reasonable load should be controlled between 50% and 80%. Practice has proved that it is the best to control the output load of UPS power supply at about 60%, and the reliability is the best. When the UPS power supply is overloaded or the inverter fails, it will switch to bypass mode. At this time, the UPS power supply does not have the backup function, and the power supply used by the load is directly supplied through the power system.
At present, valve-regulated lead-acid batteries (VRLA) used in many UPS power supplies have been called maintenance-free batteries from the beginning. This gives users a misunderstanding, as if such batteries are durable and require no maintenance at all. 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 discharge calibration voltage is 21V; for a 96V battery pack, its discharge calibration voltage is 85V.
The UPS power supply should not be powered by diesel generators, because the frequency is often sudden and unstable, which affects the normal operation of the UPS power supply.
At present, the intelligent UPS emergency power have operational performance characteristics such as communication with microcomputers and program control. Install the corresponding software on the microcomputer, connect the UPS power supply through the serial/parallel port, and run this program, you can use the microcomputer to communicate with the UPS power supply. Generally, it has functions such as information query, parameter setting, timing setting, automatic shutdown and alarm. Such as Winpower. Then connect the UPS power supply to the computer through a dedicated serial port control cable, and then communicate through the two protocols of RS232 and RS485, and the powerware UPS can automatically shut down when there is no mains input and low power. And it can monitor multiple UPS power supplies connected to a serial port at the same time.
Uninterruptible power supplies are used in many areas that require continuous power supply. In recent years, as the demand for reliable power supplies continues to grow, uninterruptible power supply technology has made progress. A wide range of applications require UPS systems, but some of the main users are data and computer centers, as well as cellular or landline telecommunications centers, where continuity of services is essential.
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