What does UPS bypass power supply mean?

# Online UPS usually has several power supply methods: (Recommended Learning: PHPSTORM )

## 1, City When the power input is normal and the host is working normally, the mains power is pure power output after voltage stabilization, rectification and filtering.

2. When the mains power is disconnected, the power output through the inverter of the battery pack is actually when the uninterruptible power supply takes effect.

3. When the mains power supply is normal but the host fails, the UPS supplies power through the bypass and directly supplies the unprocessed mains output to the load. At this time, the UPS host can no longer regulate the voltage. , filtering and other functions, it is just the output of the mains power.

ups Bypass switch: When the UPS breaks down, the bypass switch is closed, and the equipment is powered by the bypass switch. With UPS repair, the equipment can be powered without interruption.

UPS (Uninterruptible Power System/Uninterruptible Power Supply), i.e. uninterruptible power supply, connects the battery (mostly lead-acid maintenance-free battery) to the host. Modular circuits such as inverters are system devices that convert DC power into mains power.

It is mainly used to provide stable and uninterrupted power supply to a single computer, computer network system or other power electronic equipment such as solenoid valves, pressure transmitters, etc.

When the mains input is normal, the UPS stabilizes the mains power and supplies it to the load. At this time, the UPS is an AC voltage stabilizer, and it also charges the internal battery;

When the mains power is interrupted (accidental power outage), the UPS will immediately continue to supply 220V AC power to the load through the inverter switching method, so that the load can maintain normal operation and protect the load software and hardware from damage. damage. UPS equipment usually provides protection against overvoltage or undervoltage.

In the bypass state of the UPS, the inverter, voltage boost, voltage step-down, and voltage stabilizing functions are invalid. When the UPS is connected to the mains, there is an output at the output terminal. The output voltage = the mains voltage. In the bypass state , there is no difference between UPS and general power strip.

The mains input end of the UPS is equipped with a set of relays. The relays are divided into two circuits, one is the main circuit and the other is the bypass (limited to machines with bypass function).

Under normal circumstances, the mains power will be input to the mains input part of the main circuit. The mains input of the main circuit is divided into two channels: one is the regulated output (connected to the load), and the other is charging. (battery pack charging).

When the UPS is in the mains power state, the load is powered by the voltage-regulated mains power. When the mains power is disconnected, the battery inverter generates alternating current to power the load.

When the main circuit of the UPS is abnormal and cannot be turned on or cannot work normally, the relay at the input end acts, and the mains power bypasses the main circuit and directly reaches the output end of the UPS. This line is called bypass. (For UPS without bypass function, the load will lose power and shut down when the main circuit cannot work.)

In the bypass state, when there is input at the input end, there is output at the output end. If there is no input at the input end, there will be no output at the output end. The UPS cannot provide protection for the load in the bypass state and must be shut down immediately for maintenance.

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