Interlocking structure of bypass power supply switching device

Abstract

The present invention relates to an interlocking structure of a bypass power switching device, comprising: an automatic change-over switch having a joystick access part; a bypass switch that bypasses a common power supply or a backup power supply supplied to a load side and includes a bypass joystick; and an interlocking device capable of closing the joystick access portion. The interlocking device includes: a main lever rotatably connected to a bypass lever, the main lever being capable of raising and lowering an automatic change-over switch by rotation of the bypass lever; a lifting member which moves up and down in conjunction with the lifting action of the main lever and forms an inclined surface toward the joystick access part; and an opening and closing plate which is pushed to the joystick access part or the original position along the inclined surface based on the lifting of the lifting member. When the bypass switch is in bypass connection with a power supply, the operating lever access part is closed regardless of the type of the access power supply, manual switching of the automatic change-over switch is prevented, and the automatic change-over switch can be accessed to the distribution board only when the access power supply of the bypass switch is consistent with the access power supply of the automatic change-over switch.

Description

technical field [0001] The invention relates to an interlocking structure of a bypass power supply switching device, especially when the bypass power supply is used, the manual switching of the automatic switching switch is physically prevented. The automatic transfer switch can only be connected to the switchboard. Background technique [0002] Generally speaking, large buildings or factories use the normal power supply (Normal Power Supply) from power plants such as Korea Electric Power. Only when the normal power supply is abnormal (such as power failure), the internal power generation equipment is used to generate the backup power supply (Emergency Power Supply). Supply) for use. These large buildings or factories are equipped with automatic power switching devices, which include automatic transfer switches (Automatic Transfer Switch, ATS), which usually connect the common power supply and the load side to supply power to the load side. When the power supply is abnorma...

AI Technical Summary

Problems solved by technology

[0005] First, in order to maintain, repair and test the automatic transfer switch, after the bypass switch 20 is switched to the normal power supply or the standby power supply, the managers or operators may forget to switch the bypass switch 20, and then connect the joystick to In this case, it may cause damage to the power supply equipment, and may even cause a fire

That is, the bypass power supply switching device will not break down when the input power of the bypass switch 20 is consistent with the input power of the automatic transfer switch, but when the input power of the bypass switch 20 is different from the input power of the automatic transfer switch In the state, if the operator accidentally switches the power supply of the automatic transfer switch through the joystick access part 10a, it may cause a serious accident

[0006] Second, the problem with the bypass power switching device is that the management personnel use the bypass switch 20 to bypass the power supply, and disconnect the automatic transfer switch 10 from the switchboard for testing or maintenance work and then connect it to the original position of the switchboard , if the input power of the bypass switch 20 is different from the input power of the automatic transfer switch 10, it may cause the aforementioned accident

That is, the manager disconnects the automatic transfer switch 10 from the switchboard 30, and connects the normal power supply or the standby power supply to the automatic transfer switch 10 for testing or maintenance work. In the original position of 30, if the input power of the automatic transfer switch 10 and the bypass switch 20 are inconsistent, it may cause equipment damage, fire and other accidents.

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