Interlocked changeover switch

Abstract

The invention provides an interlocked changeover switch which comprises N circuit switches and N actuators superposed on the N circuit switches correspondingly, wherein the N circuit switches and the N actuators are in centralized transverse arrangement on a base plate. The N actuators are interconnected via a shared mechanical interlocking mechanism. The mechanical interlocking mechanism comprises a strip-shaped guide rail and (N-1) stoppers arranged inside the II-shaped opening on the guide rail. The guide rail is connected on the panel of the N actuators. Longitudinal elongated holes are formed on the guide rail in the positions corresponding to the shifter rods of the individual actuators, and allow the shifter rods to pass through and shift upwards and downwards. The two ends at the bottom edge of each stopper are chamfered. The width of the II-shaped opening of the guide rail is larger than the sum of width of the (N-1) stoppers, with a difference that is enough to enable the shifter rod of one actuator to shift upwards and downwards. The N is a positive integer. The interlocked changeover switch has the advantages that the interlocked changeover switch can interlock and switch in several power-supply circuits at the same level, with simple structure and convenience for installation and maintenance; simplifies the primary circuit; shortens the power-off time; improves the interlocking reliability; and improves the power supply security.

Description

Technical field: [0001] The invention relates to a circuit changeover switch, in particular to an interlocking changeover switch for more than three power supply circuits. Background technique: [0002] At present, units or equipment that require relatively reliable power supply generally use power grid dual-circuit power supply. And more important units or departments have diesel generator sets, mobile power stations, UPS and other equipment as backups to obtain more reliable power supply protection, so it is necessary to select and convert these three or more power supply circuits. The currently known method is to use a dual power supply automatic conversion device to perform power conversion. What adopts in this device is a double circuit interlocking transfer switch. [0003] The existing technology of using a double-circuit interlocking transfer switch to convert three or more power supply circuits has obvious shortcomings, mainly in: [0004] 1. The existing double-...

AI Technical Summary

Problems solved by technology

For the case of adopting double-circuit power supply of the power grid and having other backup power supply equipment at the same time, the dual-power interlocking transfer switch can only be used for the double-circuit conversion of the power grid.

When it is necessary to switch to other backup power sources, another conversion circuit or device must be used to perform second-level or even third-level conversion. The electrical structure of this multi-level conversion is more complicated, and some need to use multiple dual-level Loop interlock switch, some need to add a more complicated control circuit, and some need to be manually operated, the investment is large, and the installation and maintenance are difficult

[0005] 2. Due to the step-by-step judgment and step-by-step conversion, it takes a long time to select the target circuit when there are many circuits

[0006] 3. It is difficult to realize the mechanical interlocking of all circuits. If a malfunction occurs and multiple circuits are connected at the same time, it will cause serious accidents.

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