1. standby UPS:
-Under normal circumstances, UPS directly transmits power from the power grid to the equipment.
-When the grid voltage drops or is interrupted, UPS will switch to battery power supply.
-This UPS is mainly used in applications with low demand for standby power supply, and the switching speed is slow, which may lead to short-term power failure.
2. Online Interactive UPS (Online Interactive UPS):
The UPS is connected to the equipment and monitors the grid voltage.
-When the grid voltage drops, UPS provides stable voltage through automatic transformer (automatic voltage regulator).
-Switch to battery power supply only when the grid voltage drops to a certain extent, so as to reduce the use of batteries.
3. Online UPS:
-On-line UPS always converts the power supply into direct current (DC) and then into alternating current (AC) to supply power to the equipment.
-This UPS has almost no switching delay, can provide very clean power supply, and is suitable for equipment with very high power quality requirements.
-Even if the grid voltage is stable, it will continue to supply power through the battery, so the efficiency is low.
No matter what type of UPS, its basic working principle is to switch to standby power supply (usually battery) when the power supply of the grid is unstable or interrupted, so as to keep the equipment connected to UPS running continuously. This equipment is very suitable for key applications that need continuous power supply, such as data center, medical equipment, communication system and so on. Choosing the appropriate type of UPS depends on the equipment to be protected and the requirements for power continuity.