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How to perform UPS power overload protection?

2021-11-02 15:50:12 lebekan 0

UPS power overload protection


To ensure the normal operation of the UPS uninterruptible power supply, it is very important that the UPS power supply cannot be overloaded. If the UPS runs in an overload, the UPS will interrupt the output due to the overload due to the overload protection function of the inverter during the battery power supply process, causing unnecessary losses.


The UPS uninterruptible power supply has an overload protection function. When an overload (150% load) occurs, it jumps to the bypass state and automatically returns when the load is normal. When a severe overload occurs (more than 200% of the rated load), the uninterruptible power supply immediately stops the inverter output and jumps to the bypass state. At this time, the front input air switch may also trip. After eliminating the fault, just close the switch and restart the machine to resume work.


UPS uninterruptible power supply overload protection means that when the battery is fully charged, it protects the battery and does not continue to charge. The power of the battery will not exceed the capacity of the battery itself, otherwise the battery will be damaged.


In summary, UPS uninterruptible power supply overload protection is a function to protect the battery during charging.


In addition, low-power UPS is suitable for receiving capacitive loads, such as personal PCs, inkjet printers, scanners, etc., but not suitable for receiving inductive loads. Because the starting current of the inductive load will often exceed 3 to 4 times the rated current, this will cause instantaneous overload of the UPS and affect the life of the UPS.


For example, electric fans, refrigerators, air conditioners, etc. commonly used in the home are all typical inductive loads and cannot be connected to the output end of the UPS uninterruptible power supply.


The important characteristic of any power supply is the continuous full load capacity of the supply and release. More importantly, UPS power supplies have some built-in error margins or fault tolerance for calculating overload conditions. If the serious overload causes the UPS uninterruptible power supply motherboard to burn out or the serious uninterruptible UPS power supply, the UPS uninterruptible power supply is damaged, not working, and other hazards.


The best use range of UPS power supply is between 60% and 80% of the rated load capacity. Beyond this range, it will have a certain impact on the use of the UPS power supply during the service life. The internal components of the equipment are always in operation, which accelerates the aging of the product. An important reason.


Generally speaking, UPS power supply is overload protection. A good UPS power supply is the smallest to provide 5% overload protection, and ideally it can provide 10% overload protection.