Varmistusvirtalähde

Varmistusvirtalähde, often translated as backup power supply or uninterruptible power supply (UPS), is a device that provides emergency power to a load when the primary power source fails. It typically consists of a battery, a charger, an inverter, and control circuitry. When the mains power is active, the charger replenishes the battery, and the inverter converts the DC battery power to AC power for the connected devices. If the mains power is interrupted, the UPS automatically switches to battery power, providing a continuous supply of electricity to the connected equipment.

The primary function of a varmistusvirtalähde is to prevent data loss and equipment damage caused by sudden power outages or fluctuations. This is particularly crucial for computers, servers, medical equipment, and other sensitive electronics. UPS devices vary in their capacity, voltage, and type of output waveform, with common types including standby, line-interactive, and online UPS systems. Standby UPS units are the most basic, switching to battery power only when an outage is detected. Line-interactive UPS systems offer voltage regulation in addition to battery backup, while online UPS systems provide the highest level of protection by constantly conditioning the power and isolating the connected equipment from the mains supply.

The runtime of a varmistusvirtalähde depends on the capacity of its batteries and the power consumption of the connected devices. Smaller units might offer a few minutes of backup, sufficient to save work and shut down equipment properly, while larger units can power critical systems for hours. Regular maintenance, such as testing the battery and checking connections, is recommended to ensure the reliable operation of a varmistusvirtalähde.