Switchgear Shutter Mechanism Lateral Movement
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Solution Overview
Problem
Existing switchgear shutter arrangements require additional space, are complex in construction, and experience increased friction due to their operational mechanisms, which hinders compactness, simplicity, and reliability.
Innovation Solution
A shutter arrangement with top and bottom shutters movable in a lateral direction along slots, operated by a mechanism with an operating lever and link, and assisted by compression springs, featuring edges with profiles for smooth finish and improved dielectric performance, allowing for compact, simple, and low-friction operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional shutter operating mechanism with multiple rods and hinges is used, then the shutter can be operated to provide barrier between contacts, but the device complexity increases and friction increases
Solution Approach 1:
The patent extracts and eliminates the complex intermediate transmission elements (multiple rods and hinges) from the shutter operating mechanism. The shutter is directly connected to the circuit breaker carrier through a simplified linkage, removing unnecessary components that caused friction and complexity while maintaining the essential barrier function between contacts.
Solution Approach 2:
The patent replaces the traditional mechanical system with multiple rods and hinges with a simplified mechanical linkage that directly connects the circuit breaker carrier to the shutter. This substitution reduces the number of moving parts, decreases friction, and lowers device complexity while preserving the shutter's operational reliability.
2Reliability
If a traditional shutter operating mechanism with multiple rods and hinges is used, then the shutter can be operated to provide barrier between contacts, but the friction increases
Solution Approach 1:
The patent removes the intermediate rods and hinges that generated friction in the traditional mechanism. By directly linking the circuit breaker carrier to the shutter with a simplified connection, the patent eliminates the sources of friction while maintaining reliable shutter operation for providing the barrier between contacts.
3Reliability
If shutters are provided to block contacts during disengagement, then safety is improved, but additional space above and below shutters is required
Solution Approach 1:
The patent changes the shutter movement from vertical displacement (requiring space above and below) to lateral movement within a compact plane. The shutters move sideways on guides to provide the barrier between contacts, eliminating the need for additional vertical space while maintaining reliable contact isolation during circuit breaker disengagement.
4Reliability
If shutters move in vertical direction with traditional mechanism, then contact barrier function is achieved, but space above and below shutter is required
Solution Approach 1:
The patent transitions the shutter movement from the vertical dimension to the lateral dimension. Shutters move horizontally on guides to establish the barrier between contacts, eliminating the requirement for additional vertical space above and below the shutters while preserving the essential contact barrier function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in a more compact, simpler, and more reliable switchgear with reduced friction and enhanced dielectric performance, addressing the issues of space, complexity, and operational reliability.
Implementation Method 1
one or more compression springs adapted to cooperate with the top shutter (201a) and/or the bottom shutter (201b) such that the shutters (201a, 201b) close in accordance with the corresponding movement of the at least one operating lever or the at least one operating link
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 2c~2d
AI summary
The invention provides a switchgear having at least one group of stationary disconnect contacts and at least one group of movable disconnect contacts. The movable disconnect contacts are in association with the circuit breaker of the said switchgear. The switchgear in accordance with the invention comprises a shutter arrangement for providing physical barrier between the at least one group of stationary disconnect contacts and the corresponding at least one group of movable disconnect contacts. The shutter arrangement comprises at least one shutter having cut portions or the like. The shutter is disposed therein and movable along its plane, and is operable by a shutter operating mechanism connected thereto. Accordingly the invention also provides a method for operating the shutter arrangement of a switchgear in accordance with the invention.