Split Actuator Mechanism for Vacuum Circuit Breaker Contact Wear
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Solution Overview
Problem
Existing vacuum circuit interrupters face challenges in efficiently moving contacts between open and closed positions due to the mass of actuator elements, which requires more energy and can lead to arc formation, and they lack an efficient mechanism for accommodating contact wear without manual adjustment.
Innovation Solution
The introduction of split cooperative actuator assemblies that allow independent operation of opening and closing actuators, reducing the mass and energy requirements by moving contacts at half the distance and speed, and an automatic contact position adjustment mechanism to compensate for wear without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional spring-powered operating mechanism is used to move contacts, then contacts can be opened and closed, but the mass of actuator elements requires more energy and can lead to arc formation
Solution Approach 1:
The patent divides the single operating mechanism into two separate actuator assemblies: a first actuator assembly for opening contacts and a second actuator assembly for closing contacts. This segmentation allows each actuator to be optimized for its specific function, reducing the mass and energy requirements compared to a traditional single spring-powered mechanism that must handle both opening and closing operations.
2Ease of operation
If traditional operating mechanism with linkage is used, then contacts can be moved between positions, but the mass of the operating mechanism elements limits the speed of contact movement
Solution Approach 1:
By separating the opening and closing functions into independent actuator assemblies, the patent eliminates the need for complex linkages that connect both functions. Each actuator directly moves the contacts without requiring intermediate linkage elements, reducing the total mass that must be accelerated and enabling faster contact movement.
3Reliability
If manual adjustment mechanism is used for contact wear compensation, then contact position can be adjusted, but manual intervention is required and adds complexity
Solution Approach 1:
The patent incorporates automatic adjustment mechanisms within the actuator assemblies that compensate for contact wear without requiring manual intervention. The actuators are designed to self-adjust the contact positions based on wear indicators or positional feedback, eliminating the need for separate manual adjustment mechanisms and reducing overall system complexity.
Data Source
AI summary
An operating mechanism for a circuit breaker including an opening, first actuator assembly and a closing, second actuator assembly. The first actuator assembly is structured to operatively engage at least one movable contact and is structured to move the at least one movable contact from a first configuration to a second configuration. The second actuator assembly is structured to operatively engage the at least one movable contact and is structured to move the at least one movable contact from the second configuration to the first configuration. The first actuator assembly and the second actuator assembly are split cooperative actuator assemblies.