High-Voltage Switchgear Locking Device with Segmented Rocker Bars
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Solution Overview
Problem
Existing locking devices for high-voltage switchgear are either costly, complex, or inefficient in preventing unauthorized access to switching devices, particularly in high-voltage environments where safety and simplicity are critical.
Innovation Solution
A compact locking device utilizing a drive shaft with a closing disk, rocker bar arrangement, and slider that allows for independent actuation of on-site and remote access control, ensuring secure operation by engaging and disengaging rocker bars with the closing disk based on the switching device's position, thereby preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing locking devices are used for high-voltage switchgear, then access control is provided, but the devices are costly and complex
Solution Approach 1:
The locking device is segmented into distinct functional components: a drive shaft with closing disk for position detection, rocker bars for locking action, and a slider for access control. This segmentation allows each component to perform its specific function efficiently, reducing overall system complexity while maintaining reliability
Solution Approach 2:
The drive shaft serves multiple functions: it actuates the switching devices, detects their position through the closing disk, and triggers the locking mechanism. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure while ensuring reliable access control
2Reliability
If existing locking devices are used for high-voltage switchgear, then access control is provided, but the devices are costly
Solution Approach 1:
The locking device uses simple, easily manufactured components such as rocker bars and a slider that can be produced at low cost. These components are designed for straightforward fabrication and assembly, reducing manufacturing expenses while maintaining the reliability needed for high-voltage switchgear access control
3Reliability
If a locking device blocks access for on-site actuation, then unauthorized access is prevented, but remote actuation access must be released
Solution Approach 1:
The slider is designed to dynamically switch between two positions: blocking remote actuation when on-site access is permitted, and releasing remote actuation when on-site access is blocked. This dynamic behavior allows the system to automatically adapt to different operational modes, simplifying the ease of operation while maintaining security
Solution Approach 2:
The locking device incorporates feedback through the drive shaft and closing disk, which detect the position of switching devices and automatically control the locking and unlocking actions. This feedback mechanism ensures that the correct access control state is maintained without requiring manual intervention, improving ease of operation while preventing unauthorized access
Data Source
AI summary
The device is used for locking an access for actuating two switching devices of high-voltage switchgear with the aid of a drive shaft transmitting drive force onto the two switching devices. In order to increase the operational safety of the high-voltage switchgear with little outlay, the locking device comprises a closing disk which is fastened on the drive shaft, a rocker bar arrangement containing at least four rocker bars, and a slider. The slider can be moved, on-site, into two positions, the first of which releases an access for the actuation on-site and blocks an access for the actuation from a remote location, and the second of which blocks the access for the on-site actuation and releases the access for the remote actuation.