Will the Power Be Cut Off During UPS Switching?
UPS (Uninterruptible Power Supply) is a critical device for ensuring continuous power supply. However, many people wonder: Will the power be cut off during UPS switching?
Whether a UPS experiences a power interruption during switching depends on its type. The commonly used UPS systems include standby UPS and online UPS.
Standby UPS: When the mains power is normal, the load is directly powered by the mains. In the event of a power outage, the inverter quickly converts the battery's DC power into AC power for output. Although the switching speed is fast, there is theoretically a very brief switching time. However, since most devices have internal capacitors in their power supplies, they can generally tolerate this short switching period, making it negligible in practice.
Online UPS: This type operates continuously, meaning the inverter circuit is always active. When the mains power is normal, the external AC power is converted to DC power to charge the battery, while the inverter simultaneously converts the DC power into high-quality sine wave AC power for the load. If the mains power fails, the battery directly supplies power to the load via the inverter, eliminating any switching time. This makes online UPS ideal for applications with strict power requirements.
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