Switchgear for medium voltage

By decoupling the movements of the load disconnector and earthing switch in the medium-voltage switchgear and converting the rotational motion into translational motion using a mechanical coupling device and a transmission device, the problems of space waste and speed limitation during the switching process of the medium-voltage switchgear are solved, and fast and space-saving switching is achieved.

CN115210837BActive Publication Date: 2025-09-19SIEMENS AG
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Patent Information

Application Number
CN202180019043.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-03-03
Filing Date
2021-02-10
Publication Date
2025-09-19
Estimated Expiration
2041-02-10

AI Technical Summary

Technical Problem

Existing medium-voltage switchgear requires a large amount of structural space and an additional drive system to achieve the grounding function during the switching process, resulting in space waste and limited switching speed.

Method used

The switching action of the load isolating switch is decoupled from the movement of the earthing switch through a mechanical coupling device, and the rotational movement of the load isolating switch is converted into the translational movement of the earthing switch using a lifting rod and a transmission device, thereby reducing unnecessary movement of the earthing switch, saving structural space and increasing the switching speed.

Benefits of technology

The fast switching of medium-voltage switchgear in a limited space is achieved, which reduces component wear and increases switching speed while reducing the impact on motion quality.

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Abstract

The invention relates to a switchgear for medium voltage, comprising: a load disconnector (1), which has three switching positions for "on" (40), "off" (41) and "grounding" (42), wherein the switching position "on" (40) switches the medium voltage connection to an output line (15) via a fuse device (12); and an earthing switch (2) arranged downstream of the fuse device (12) and used to ground the output line (15), wherein the earthing switch (2) is connected to the load disconnector (1) via a mechanical coupling device (25, 31-37, 50-63), characterized in that in the case of a switching action of the load disconnector (1) from "off" (41) to "on" (40), the earthing switch (2) is mechanically decoupled.
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Citation Information

Patent Citations

  • Arrangement comprising a load interrupter and a grounding switch

    WO2009010359A2

  • curve profile switch

    DE102005013231B3

  • arrangement with a switch-disconnector and an earthing switch

    DE102007033704A1