Uninterruptible power supplies also have overload protection. When overloaded (150% load), skip to bypass and return automatically when load is normal. When a severe overload (over 200% of the rated load) occurs, the uninterruptible power supply immediately stops the inverter output and jumps to the bypass state, when the input air switch at the front may also trip. After the trouble is removed, the switch is switched on and restarted to resume operation.
The working process of UPS when the normal 380/220VAC, DC main circuit DC voltage supply DC-AC AC inverter output uninterrupted stable AC voltage 220V or 380V at the same time, the city electricity after rectification of battery charging. When the power supply is under voltage or suddenly loses power, the battery unit feeds the electric energy to the DC circuit through the isolated diode switch. There is no switching time from the grid to the battery. When the battery energy exhausted, uninterruptible power supply alarm and stop the inverter in the battery discharge limit, alarm bells ringing.
UPS (Uninterruptible Power System/Uninterruptible Power Supply), namely, uninterruptible power supply, the battery is (for maintenance free lead-acid batteries) connected with the host, the host through the inverter module circuit of the direct current into power system equipment. The utility model is mainly used for providing stable and uninterrupted power supply for a single computer, a computer network system or other power electronic equipment, such as an electromagnetic valve, a pressure transmitter, etc.. When the power input is normal, UPS electric voltage supplied to the load, the UPS is an AC power regulator, it is also the built-in battery; when the power interruption (outage), UPS immediately DC battery energy conversion method by zero switching inverter continue to supply 220V AC power to the load, the load to maintain normal working load and protection of software and hardware is not damaged. UPS devices are usually protected against high voltage or low voltage
