It is mainly used to provide stable and uninterrupted power supply for a single computer, computer network system, electromagnetic valve, pressure transmitter and other power electronic equipment.
Extended data
I. Functions and Principles
In the power system, the core equipment such as DCS (distributed control system), monitoring system, automation instrument, dispatching communication system and microcomputer system have very high requirements on power supply quality and reliability, and need special UPS for power supply. Most of these loads are single-phase loads.
Power UPS system is generally composed of power UPS host, bypass voltage stabilizing cabinet and output feeder cabinet (low power can also be three in one).
1. UPS main cabinet: input and output isolation transformer, rectifier, inverter, static bypass switch, bypass switch and check diode;
2. Bypass isolation voltage stabilizing cabinet: bypass isolation transformer, bypass voltage stabilizer and manual/bypass maintenance switch;
3. Feed cabinet: loop power distribution device, monitoring instrument, control switch and signal indication, etc.
When the commercial power is normal, the AC power supply is isolated, rectified and filtered, and then the inverter provides a stable AC power supply to the load. If the AC input is abnormal or power is cut off, the DC screen will provide DC through the unidirectional diode and output it to the load after inverter. When the DC screen is under-voltage or powered off, it is statically turned on and switched to the AC bypass power supply.
References:
Power UPS power supply _ Baidu encyclopedia