UPS will burn down in those cases? Is it because the voltage of the mains voltage exceeds the input voltage range? Or because the percentage of the load is too large?
The UPS of the big brand will not burn out beyond the input voltage range and will not burn if the percentage of load is too large. Because UPS has the self-protection function. Voltage and load are out of range and UPS does not work. 90-270 access 380UPS does not work. Not burn. Unless you sell fakes. Generally burned is the aging of components, or internal dust, static and other internal causes of UPS. I don't know the Shanzhai UPS. 380 input with 220 city electricity will not burn, when the voltage is too low, the battery power supply UPS work properly.
The battery contacts the terminal to damage or to be stained with the dirty thing, and the electric conduction causes the battery instantaneous to form the passage, the current is too big, appears burns the phenomenon.
Proper discharge will help the battery to activate, such as long-term non-stop electricity market, every three months should be artificially broken city electricity, with UPS load discharge once, so that can extend the service life of the battery.6) for the majority of small UPS work, open UPS, boot to avoid load startup, the work should be closed for UPS; the network room UPS, because most of the network is 24 hours of work, so UPS must also be all-weather operation.7) UPS discharge should be charged in time, so as to avoid damage to the battery due to excessive discharge.
UPS use environment should pay attention to good ventilation, is conducive to heat dissipation, and keep the environment clean.2) do not take inductive load, such as currency counter, fluorescent lamp, air conditioner, etc., so as not to cause damage.3) the output load of UPS is controlled at about 60%, the highest and the highest reliability.4) UPS carries too light (such as 1000VA UPS band 100VA load), may cause deep battery discharge, will reduce battery life, should be avoided as far as possible.
