Dual Power Transfer Switch

Abstract

The present application relates to a dual power transfer switch, which includes a load side phase line pole, a first phase line switch, a second phase line switch, a load side neutral pole, a first neutral line switch and a second neutral line switch. When the first phase line switch and the second phase line switch are both turned off, at least one of the first neutral line switch and the second neutral line switch is turned on. When the second power supply starts to supply power, the second neutral line switch The conduction precedes the conduction of the second phase line switch. The moment before the second phase line switch is turned on, the first neutral line switch is turned off, and when the first power supply starts to supply power, the conduction of the first neutral line switch The first phase line switch is turned on before the first phase line switch is turned on, and the second neutral line switch is turned off at the moment before the first phase line switch is turned on. Suitable for applications with strict requirements on continuous power supply.

Description

technical field [0001] This application designs a dual power transfer switch, especially a dual power transfer switch involving overlapping neutral lines. Background technique [0002] The dual power transfer switch was born in response to the requirement of continuity of power supply. As people's requirements for power supply continuity, safety, and reliability continue to deepen, the application of dual power transfer switches is becoming more and more extensive. Such as hotels, theaters and other important public places where people are concentrated, the interruption of power supply will cause chaos and even endanger the lives of guests. Relevant industry standards stipulate that its power distribution system must have emergency power supply. Another example is the data center, where the loss of power supply voltage means the loss of data. People use dual power transfer switch and UPS uninterruptible power supply combination to ensure the continuity of its power supply...

AI Technical Summary

Problems solved by technology

However, during the conversion process of the power supply, the neutral line will have a temporary disconnection like other phase lines, which will cause fluctuations in the voltage of some power consumption settings and thus cause impact and loss

For example, in the application of uninterruptible power supply for data centers powered by combined ATSE and UPS, the short-term disconnection of the neutral wire will increase the neutral ground voltage of the UPS and cause the server to restart, resulting in serious consequences such as data loss or server damage.

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