Detachable Circuit Breaker Module for SPD Backup Protection
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Solution Overview
Problem
Existing surge protective devices (SPDs) lack comprehensive backup protection, have limited current threshold sensitivity, are space-constrained, and are inconvenient to install and disassemble, leading to potential fire risks and inadequate circuit protection.
Innovation Solution
A circuit protection apparatus with a compact switch module featuring a handle assembly, tripping mechanism, electromagnetic mechanism, and detachable housings, allowing manual and automatic control of circuit connections, and integration with a fuse for enhanced safety and convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional circuit breaker or fuse is used for SPD backup protection, then the protection function is provided, but the current threshold range is limited and there are protection blind spots
Solution Approach 1:
The patent divides the protection function into multiple independent modules: electromagnetic mechanism for overcurrent protection, handle assembly for manual control, and tripping mechanism for coordination. This segmentation allows each module to operate independently across different current thresholds, eliminating protection blind spots and enabling comprehensive coverage from low to high current ranges.
2Reliability
If existing SPD protection device is used, then the protection function is provided, but the installation space is limited and installation/disassembly is inconvenient
Solution Approach 1:
The device is divided into a first housing containing control mechanisms and a second housing containing contact assemblies, connected through a detachable connection. This segmentation allows the units to be installed and disassembled independently, significantly improving installation convenience while maintaining comprehensive protection functions.
Solution Approach 2:
The handle assembly serves multiple functions: manual tripping, resetting the protection device, and indicating operational status. This multi-functionality reduces the number of separate components needed, optimizing installation space while maintaining full protection capabilities.
3Reliability
If existing SPD protection device is used, then the protection function is provided, but the installation space is constrained
Solution Approach 1:
The tripping mechanism is integrated within the first housing, and the electromagnetic mechanism is positioned to utilize the same space. The handle assembly operates within the confines of the first housing, with its operating portion extending outward. This nested arrangement minimizes the overall footprint while maintaining all protection functions.
Solution Approach 2:
The patent utilizes vertical stacking of components within the housing, with the handle assembly positioned at the upper part and the electromagnetic mechanism at the lower part of the first housing. This three-dimensional arrangement optimizes space utilization, reducing the horizontal installation footprint while maintaining all functional components.
4Speed
If electromagnetic mechanism is added for automatic tripping, then the response speed is improved, but the device complexity increases
Solution Approach 1:
The electromagnetic mechanism is integrated with the existing handle assembly and tripping mechanism. The electromagnetic mechanism's output end directly actuates the tripping mechanism, which in turn operates the handle assembly. This merging of functions into a single coordinated system achieves fast automatic tripping while minimizing the increase in overall device complexity.
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 apparatus provides stable, efficient, and safe circuit protection with improved current threshold sensitivity, facilitating easy installation and disassembly, and reduces the risk of electrical fires by ensuring comprehensive protection.
Implementation Method 1
an electromagnetic mechanism, installed in the first housing, the electromagnetic mechanism has a movable second output end, and the second output end is used for contacting the tripping mechanism; wherein, the electromagnetic mechanism is used for driving the tripping mechanism to enter the tripping state from the locking state
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention discloses a circuit protection apparatus (300), comprising: a first housing (110); a handle assembly (120), installed in the first housing (110); a tripping mechanism (130), installed in the first housing (110), the handle assembly (120) is connected to the tripping mechanism (130), and the tripping mechanism (130) has a first output end (131); an electromagnetic mechanism (140), installed in the first housing (110), the electromagnetic mechanism (140) has a movable second output end (141), and the second output end (141) is used for contacting with the tripping mechanism (130). The first housing (110) is detachably mounted on the second housing (210). A moving contact assembly (220), installed in the second housing (210), the first output end (131) is connected to the moving contact assembly (220), for forming a main electrical connection when the first output end (131) is in the first position and for breaking the main electrical connection when the first output end (131) is in the second position.