Mechanical Breakpoint Module With Free Tripping for Solid-State Breakers
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Solution Overview
Problem
Existing solid-state circuit breakers lack a free tripping function in their mechanical breakpoint modules, which prevents automatic opening in case of unexpected events like overloads, compromising circuit stability and safety.
Innovation Solution
A mechanical breakpoint module with a free tripping function, incorporating a housing, a rotatable handle, a fixed contact, a moving contact, a transmission assembly, an energy storage component, and a locking assembly that can be unlocked by a controller signal, allowing automatic opening of the circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the mechanical breakpoint module uses a simple manual operation mechanism, then the device complexity is reduced, but the automation capability is insufficient
Solution Approach 1:
The energy storage component (spring) is pre-loaded during the closing operation to store energy. When tripping is needed, this pre-stored energy is released to automatically open the circuit without requiring manual intervention, thus achieving automatic opening capability while keeping the mechanism relatively simple.
Solution Approach 2:
The locking assembly acts as an intermediary mechanism that controls the release of stored energy. It receives control signals (manual or automatic) and mediates the transition from the locked closed state to the unlocked state, enabling the energy storage component to drive the moving contact separation only when authorized.
2Reliability
If the mechanical breakpoint module is locked in closed position, then the circuit stability is improved, but the safety response to unexpected events is delayed
Solution Approach 1:
The energy storage component is pre-charged during the closing operation, so that when an unexpected event occurs, the system can immediately release the stored energy to open the circuit without delay for manual intervention or complex activation sequences, thus reducing response time while maintaining stable closed state operation.
Solution Approach 2:
The controller receives feedback about circuit conditions (such as overload detection) and can automatically send a control signal to the locking assembly to release the stored energy and open the circuit, creating a closed-loop safety response system that reduces response time while maintaining operational stability.
3Reliability
If only the electronic breakpoint module is used for circuit protection, then the device complexity is reduced, but the reliability under unexpected events is insufficient
Solution Approach 1:
The circuit protection system is divided into two independent modules: an electronic breakpoint module for normal overcurrent protection and a mechanical breakpoint module with energy storage for automatic tripping under unexpected events. This segmentation allows each module to specialize in specific protection scenarios, improving overall reliability while keeping individual modules relatively simple.
Solution Approach 2:
The system changes the operational parameters by switching between electronic control (for normal operation) and mechanical energy release (for unexpected events). This parameter change enables the system to handle different types of faults with appropriate methods, improving protection reliability without requiring the entire system to be complex.
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
Enables automatic opening of the circuit breaker in response to overloads or other unexpected events without manual intervention, enhancing the safety and stability of the circuit by ensuring timely disconnection.
Implementation Method 1
an energy storage component connected to the transmission assembly and configured to drive the transmission assembly to move
Data Source
AI summary
A mechanical breakpoint module, which is used for a solid-state circuit breaker and includes a housing; a handle; a fixed contact; a moving contact; a transmission assembly through which the movement of the handle is transmitted to the moving contact; an energy storage component connected to the transmission assembly and configured to drive the transmission assembly to move; a locking assembly capable of being switched between a locked state and an unlocked state; wherein the locking assembly can receive an unlocking signal sent by the controller to be switched from the locked state to the unlocked state, so that the transmission assembly is driven by the energy storage component, and then the moving contact is driven to be separated from the fixed contact.