Switchgear Single Operating Mechanism Multi-Position Control
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Solution Overview
Problem
Conventional high-voltage switchgears have complex structures due to multiple components for generating and transmitting operating force, leading to increased maintenance loads, especially when accommodated in containers.
Innovation Solution
A switchgear with a sealed tank containing insulating gas, a fixed contact, and a movable contact operated by a single mechanism that allows the movable contact to stop at three or more positions, simplifying the structure and reducing the number of operating mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple operating mechanisms are provided for circuit breaker, disconnector, and earthing switch, then each device can be operated independently and reliably, but the structure becomes complicated and maintenance load increases
Solution Approach 1:
The patent combines multiple operating mechanisms into a single integrated operating mechanism that controls the circuit breaker, disconnector, and earthing switch. This is achieved by merging the drive systems and control logic into one unified mechanism, reducing structural complexity while maintaining the ability to independently operate each device through coordinated control sequences.
Solution Approach 2:
The single operating mechanism is designed with multi-functionality to perform the operations of previously separate mechanisms. It includes multiple output shafts and transmission paths that can independently actuate different devices (circuit breaker, disconnector, earthing switch) based on control signals, making one mechanism serve multiple functions that previously required separate mechanisms.
2Ease of operation
If multiple operating mechanisms are provided for each device, then each device can be controlled independently, but the number of components increases and maintenance becomes more difficult
Solution Approach 1:
By merging multiple operating mechanisms into one integrated system, the patent reduces the total number of components that require maintenance. The single operating mechanism includes unified lubrication systems, sealed enclosures, and standardized components, making maintenance easier compared to multiple separate mechanisms while preserving independent control through electronic or mechanical interlocking.
Solution Approach 2:
The operating mechanism incorporates self-diagnostic and self-maintenance features such as automatic lubrication systems, sealed bearings that require no maintenance, and position sensors that automatically detect and report operational status. This reduces the need for manual intervention and simplifies repair procedures while maintaining independent control capabilities.
Data Source
AI summary
An object is to provide a switchgear having a simple structure. To solve the problem, a switchgear according to the invention is characterized by having a fixed side electrode 3, a movable side electrode 4 configured to come into contact with or separate from the fixed side electrode 3, and an operating mechanism configured to allow drive force for movement of the movable side electrode 4 to be generated, wherein the operating mechanism for operating the movable side electrode 4 includes one operating mechanism, and the one operating mechanism allows the movable side electrode 4 to stop at three or more positions.