UPS is mainly used for two purposes:
- Provide a stable power source for all operating processes in the event that the main power supply is abruptly disconnected, as well as while waiting for the auxiliary power supply to start up to replace the previously disconnected main power supply. 
– Monitor and maintain voltage, frequency, and other parameters in accordance with prescribed parameters, creating conditions for the main power source to avoid the instability caused by using unrefined mains power (making voltages worse) and frequency (unstable: high and low) and eliminating unwanted risks due to power outages.
Global Electrical Engineering Joint Stock Company receives repair and maintenance for: with a staff of highly qualified, well-trained, and trained foreign experts:
UPS devices.
Rectifier
Inverter
Converter