Circuit Breaker Shutter Locking Mechanism Integration
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Solution Overview
Problem
Existing circuit breakers require separate assemblies to set the trip-free condition and lock shutters, making the process cumbersome and requiring multiple actions.
Innovation Solution
A single actuation assembly that simultaneously locks the circuit breaker shutters in a closed position and sets the circuit breaker to a trip-free condition, integrating the shutter lock and trip-free mechanisms for streamlined operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate assemblies are used to lock shutters and set trip-free condition, then each function can be performed independently, but the operational complexity increases and requires multiple actions
Solution Approach 1:
The patent combines the shutter lock assembly and trip-free mechanism into a single integrated actuator assembly. When the user operates this unified assembly, it simultaneously performs both functions: locking the shutters in the closed position and setting the circuit breaker to trip-free condition. This merging eliminates the need for separate operations while maintaining reliable execution of both functions.
Solution Approach 2:
The integrated actuator assembly serves multiple functions through a single device. It can lock the shutters, set the trip-free condition, and potentially unlock shutters, all through one operational interface. This multi-functional design reduces operational complexity while maintaining the reliability of each individual function through dedicated mechanical pathways within the unified assembly.
2Ease of operation
If a single actuation assembly is used to simultaneously lock shutters and set trip-free condition, then operational complexity is reduced, but the device structure becomes more complex
Solution Approach 1:
The patent merges the shutter lock assembly and trip-free mechanism into a single integrated actuator assembly that performs both functions simultaneously through one user operation, reducing operational complexity while managing internal structural integration.
Solution Approach 2:
Within the integrated actuator assembly, the patent employs segmentation by providing separate actuation pathways or components for different functions. The assembly includes distinct mechanisms for shutter locking and trip-free setting that can operate independently within the unified structure, allowing modular design approaches that manage complexity through functional segmentation.
3Ease of manufacture
If separate assemblies are used for shutter locking and trip-free mechanism, then each component is simpler, but the overall system requires more parts and assembly steps
Solution Approach 1:
The patent reduces the total quantity of components by merging the shutter lock assembly and trip-free mechanism into a single integrated actuator assembly. This consolidation eliminates redundant structural elements, fasteners, and mounting components that would be required for separate assemblies, while maintaining the functional simplicity of individual mechanisms through modular integration.
Data Source
AI summary
In one embodiment, a shutter lock assembly for a circuit breaker cassette having a shutter coupled to a shutter rod is provided. The shutter lock assembly includes a lock plate assembly configured to couple to the circuit breaker cassette and an actuation mechanism having a first end coupled the lock plate assembly. The actuation mechanism is configured to actuate the lock plate assembly to lock the shutter of the circuit breaker cassette in a closed position.