Daily maintenance of UPS power supply
· Keywords: Shenzhen Sidian Industrial Co., Ltd. UPS
· Abstract: In the process of using UPS uninterruptible power supply system, people often think that the battery is maintenance-free without paying attention to it. However, some data show that the proportion of UPS host failure or abnormal operation caused by battery failure is about 1/3. It can be seen that strengthening the correct use and maintenance of UPS batteries has more and more important significance for prolonging the service life of batteries and reducing the failure rate of UPS systems. In addition to choosing regular brand batteries, UPS batteries should be used and maintained correctly from the following aspects.
In the process of using UPS uninterruptible power supply system, people often think that the storage battery is maintenance-free without paying attention to it. However, some data show that the proportion of UPS host failure or abnormal operation caused by battery failure is about 1/3. It can be seen that strengthening the correct use and maintenance of UPS batteries has more and more important significance for prolonging the service life of batteries and reducing the failure rate of UPS systems. In addition to the selection of regular brand batteries, the correct use and maintenance of batteries should be started from the following aspects:
(1) Dust is brought into the machine and deposited. When the air is humid, it will cause the control of the host to be disordered, causing the host to malfunction, and inaccurate alarms will occur. A large amount of dust will also cause poor heat dissipation of the device. Generally, it should be cleaned thoroughly every quarter. Secondly, when removing dust, check whether the connectors and connectors are loose or not in firm contact.
(2) Although all energy storage battery packs use maintenance-free batteries, this only eliminates the work of measuring ratios, proportioning, and regularly adding distilled water in the past. However, the impact of external factors on the battery has not changed, and the impact of abnormal operating conditions on the battery has not changed. This part of the maintenance and repair work is still very important. A large number of maintenance and repair work for the UPS power system is mainly in the battery part.
All energy storage batteries work in a floating state, in which case they should be discharged at least once a year. Before discharging, the battery pack should be balanced and charged to achieve the balance of the whole battery pack. Be aware of the lagging batteries that existed in the battery pack before discharging. If one reaches the end-of-discharge voltage during the discharging process, the discharging should be stopped, and the discharging should be continued, and the lagging battery should be eliminated before discharging.
Checking discharge is not the first to pursue the percentage of the discharge capacity, but to find and dispose of backward batteries, and then conduct a check discharge experiment after dealing with the backward batteries. This can prevent accidents and prevent the backward battery from deteriorating into a reverse polarity battery during discharge.
Usually, each battery pack should have at least 8 batteries as the label battery. As a reference for understanding the working conditions of the full battery pack, [Industrial Electrical Network -cnelc] should regularly measure and record the label battery.
The items that need to be checked frequently in daily maintenance are: clean and check the voltage and temperature at both ends of the battery; whether the connection is loose or corroded, and check the pressure drop of the connection bar; whether the appearance of the battery is intact, whether there is shell deformation and leakage; , Whether there is acid mist escaping around the safety valve; whether the host equipment is normal.
Maintenance-free batteries need to be maintained. It is not nonsense. You should proceed from a broad maintenance standpoint to ensure that the operation and daily management are thoughtful, meticulous and standardized to ensure that the equipment (including host equipment) maintains good operating conditions, thereby extending the service life ; To ensure that the DC bus always maintains a qualified voltage and battery discharge capacity; to ensure the safety and reliability of battery operation and personnel. This is the purpose of battery maintenance, and it is also the content and rules included in the battery operation regulations.
(3) When the UPS battery system fails, first find out the cause, and distinguish whether it is the load or the UPS power system; whether it is the host or the battery pack. Although the UPS host has a fault self-checking function, it is opposite to the opposite point, which is very convenient for replacing parts. However, to repair the fault point, a lot of analysis and testing work is still required. In addition, if there is a failure in the self-checking part, the displayed failure content may be wrong.
(4) If the host has a breakdown, an insurance break or a device burned out, you must find out the cause and eliminate the failure before restarting, otherwise the same failure will occur one after another.
(5) When a battery with reverse voltage, large voltage drop, large pressure difference and acid mist leakage is found in the battery pack, the corresponding methods should be used to restore and repair in time, and those that cannot be restored and repaired should be replaced, but the difference should not be changed. The capacity, performance, and batteries of different manufacturers are connected together, otherwise it may have an adverse effect on the entire battery pack. The battery pack that has expired should be replaced in time to avoid affecting the host.
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