The ups-up power supply (Uninterruptible Power System), which is an uninterruptible power supply, is an uninterruptible power supply with a constant voltage constant frequency with an energy storage device and an inverter as a main component. UPS power supplies play an important role in protecting your data and machinery from damage. Therefore, the proper use and maintenance of the UPS is very important. Many users are limited to the precautions in the product manual. In fact, the reasonable maintenance and use of the UPS is required throughout the life cycle of the UPS. In order to ensure its normal operation and prolong its service life, the following aspects should be noted in the use and maintenance:
1. Reasonable choice of installation location
A good installation location is very important. The place where the UPS is placed must have good ventilation. Keep away from water, flammable gases and corrosive agents. The ambient temperature should be between 0 and 40 °C. If it is disassembled at low temperature, it may be There is a condensation of water droplets. Once the ambient temperature exceeds 25 degrees, the battery life is reduced by half for every 10 degrees. 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 sideways. The air inlet and outlet air holes should be kept open. When the load is connected to the UPS power supply, the load must be turned off and then re-wired. Then, load should be turned on one by one. It is forbidden to connect the inductive load such as electric and copier to the UPS. cause some damages. When the UPS is connected to a dedicated outlet with overcurrent protection, the power outlet used should be connected to the protective ground; the UPS output may be energized regardless of whether the input power cord is plugged into the mains outlet. To make the UPS have no output, you must first turn off the switch and then cancel the mains supply.
2. Tips for charging for the first time
After the new UPS power supply is purchased, the UPS should be plugged into the 220V mains grid and charged 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 is not used for a long time. It should be turned on every 2 to 3 months for 24 hours to make it fully charged, and let the UPS power supply be in the inverter working state for 2 to 3 minutes to ensure the normal life of the battery. Once the UPS power is turned on, the battery pack is charged. Press and hold the power button for more than 1 second to turn on the inverter.
3. UPS cannot be idle for a long time
Excessive discharge of the battery and long-term open circuit of the battery do not allow the internal resistance of the battery to increase, and the charge and discharge performance deteriorates. For long-term idle unused UPS power supply, let the UPS power supply be charged after 12 hours of charging using the charging circuit in the machine before restarting the power. For the backup UPS power supply, it is better to let the UPS power supply be in the inverter every other month. The state works 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 charging current allowed by the battery. Because the excessive charging current will cause the battery life to be shortened.
4. Power-on and power-off sequence when using UPS
The correct power-on shutdown sequence should be to first turn on the UPS to supply power to it, and then turn on the various loads, so as to avoid the damage caused by the instantaneous current impact during startup. In the order of shutdown, the load should be closed first and then the UPS should be shut down. . When the mains supply is interrupted by the UPS, you should save your own data and data as soon as possible and then turn off the computer. Otherwise, using the UPS power supply may cause the UPS to over discharge, thus shortening the service life of the UPS.
5. Avoid overloading with UPS
When using the UPS, calculate the load size. To avoid the load being too large or too small, the excessive load will make the UPS work in the overload state for a long time and shorten the service life of the UPS. If the load is too small, the UPS works. The circuit works 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 about 60% is the best and the reliability is the best. When the UPS is overloaded or the inverter fails, it will go to bypass mode operation. At this time, the UPS does not have the backup function, and the power used by the load is directly supplied through the power system.
6. Use of AC voltage regulator
After using the UPS power supply, it is no longer necessary to add an AC voltage regulator. If it must be added, it should be added to the front stage of the UPS, that is, the mains supply first through the AC voltage regulator, then through the UPS, and then to the load.
7. Battery balanced charging has skills
The valve-regulated lead-acid batteries (VRLA) used in many UPS power supplies have been called maintenance-free batteries since the beginning, which gives users a misconception that the batteries are both durable and completely maintenance-free. Under this misleading, many users have not been extensively maintained and managed since the battery was installed. When the battery in the UPS power supply encounters the following conditions, the battery should be balancedly charged: excessive discharge causes the terminal voltage to be lower than the rated voltage specified by the battery. For the 12V small sealed lead-acid battery, the discharge calibration voltage is 10.5V; for the 24V battery pack, the discharge final voltage is 21V; for the 96V battery pack, the discharge calibration voltage is 85V. The battery is not charged in time after discharge; the battery is unused for a long time. The mains is interrupted, and the battery is continuously floated, releasing nearly half of the battery.
8. Do not use diesel generators
UPS should not be powered by diesel generators, because its frequency often changes suddenly and affects the normal operation of the UPS.
9. Pay attention to the safe operation of the operator
When connecting the output power to the UPS, you should also pay attention to safety. Since the output voltage and current of the UPS are relatively large, you should also pay attention to safety to prevent electric shock accidents when connecting the output power.
When replacing the battery, first turn off the UPS and disconnect from the mains. Use a screwdriver with an insulated handle. Do not place tools or other metal objects on the battery. When connecting the battery cable, it is normal for the small spark to appear at the joint. It will not cause harm to personal safety and UPS power supply. Never short or reverse the battery positive and negative terminals. When replacing the battery, it is not advisable to replace it separately. It is best to replace it as a whole. It is also forbidden to combine batteries of different amperages and different brands.
10. Real-time monitoring
At present, intelligent UPS has operational performance characteristics such as communication and program control with microcomputer. Install the corresponding software on the microcomputer, connect the UPS through the serial/parallel port, run the program, and use the microcomputer to communicate with the UPS. Generally have the functions of information inquiry, parameter setting, timing setting, automatic shutdown and alarm. Such as Winpower. Then through the dedicated serial port control cable, the UPS is connected to the computer, and then through RS232 and RS485 two protocols communication, it can realize the function that the UPS has no mains input and automatically shuts down when the battery is low. And it can monitor multiple UPS connected to multiple serial ports at the same time. Among them, through the RS232 protocol, a serial port can only be connected to one UPS. Through the RS485 protocol, a serial port can connect up to 256 UPSs.
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