Dual power automatic transfer switch conversion control method and dual power automatic transfer switch

Abstract

The invention discloses a dual power automatic transfer switch conversion control method. If a dual switch is in a commonly used position, when an abnormal frequently-used power supply is detected andthe duration is T1 while a standby power supply is normal, no matter whether the frequently-used power supply returns to normal or not, the dual switch is switched from the commonly used position toa switched off position; if the switch is in the standby position, for example, when the frequently-used power supply returns to normal and is kept normal for time T3, the switch is switched from thestandby position to the switched off position; after the switch is switched to the switched off position, the time T2 is waited; if the standby power supply is normal during the period, the switch isswitched from the switched off position to the standby position after the time T2; if the standby power supply is abnormal and the frequently-used power supply is normal during the period, the switchis switched from the switched off position to the commonly used position after the time T2; and if during the period, the standby power supply is abnormal and the frequently-used power supply does notreturn to normal, the switch remains at the switched off position. The invention also discloses a dual power automatic transfer switch. According to the dual power automatic transfer switch conversion control method and the dual power automatic transfer switch, the frequent switching of the switch position can be prevented when the voltage of the frequently-used power supply is unstable.

Description

technical field [0001] The invention relates to a dual power supply automatic transfer switch transfer control method, which belongs to the technical field of low-voltage electrical appliances. Background technique [0002] The common automatic transfer switching equipment (called ATSE) is composed of switch parts, mechanical interlock, electric operating mechanism and controller, and has two positions of normal and standby or three positions of normal, standby and disconnection. In the power supply system of normal and backup two-way power supply, when one of the power supplies has undervoltage, overvoltage, frequency deviation, or phase failure, the switch can automatically switch to the other normal power supply to ensure the reliability of power supply. When the switch needs to be overhauled, the switch can be turned to the off position and locked to ensure the safety of personnel during the switch overhaul operation. [0003] ATSE usually has three deliberately introdu...

AI Technical Summary

Problems solved by technology

Therefore, when the common side power supply cannot maintain a stable normal voltage, the switch may switch back and forth between the normal power supply and the disconnected position, and cannot provide normal, stable and continuous power supply to the load equipment, even if T1 and T3 are set longer , can only reduce the probability of frequent conversions, but cannot solve this problem

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