UPS

In case of power outage, the most necessary power supply is provided from auxiliary power sources. Examples of consumers who must not be left without power are: lighting and equipment of operating rooms, telephone exchanges, elevators, etc. Today, aggregates and electronic sources – UPS – are used as auxiliary sources.

The name UPS is an abbreviation of the English words Uninteruptible Power Supply, which means uninterruptible power supply. UPS are used for uninterruptible power supply of devices of lower power, such as e.g. computers, telephone exchanges, fax machines, etc. Generators are used to power stronger consumers. There are generators that start manually and generators that start automatically when the power supply is cut off from the mains. The self-starting units have built-in electric motor heaters so that the motor is always heated to operating temperature, so it can be loaded at full load immediately.

Switching consumers from the mains to the generator can be done manually with a comb switch or automatically with a contactor. When determining the required power of aggregates, it is necessary to take into account not only the total power of consumers, but also their characteristics. Eg. electric motors with direct start-up draw up to five times more current than in normal operation, so we need a unit of approximately 10 kW and more to start a motor with an electric power of 2.5 kW. For facilities of greater importance, the UPS and the generator are installed, whereby significant consumers are supplied from the UPS, and less important from the generator.