Modular Circuit Breaker Assembly for SPD Blind-Spot Protection
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Solution Overview
Problem
Existing surge protective devices (SPDs) have limitations in current threshold detection, leading to potential fire risks and inconvenient installation, with single protection functions and limited applicability to different circuit specifications.
Innovation Solution
A circuit protection apparatus with a compact switch module comprising a handle assembly, tripping mechanism, electromagnetic mechanism, and movable contacts, allowing manual and automatic control for circuit on/off, and integrated 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 detection range is limited and blind spots exist
Solution Approach 1:
The patent divides the protection function into multiple independent modules: electromagnetic mechanism for surge detection, tripping mechanism for circuit interruption, and handle assembly for manual control. Each module operates independently with its own triggering thresholds, eliminating blind spots in current detection by providing multi-level protection coverage.
2Reliability
If existing SPD protection device is used, then protection function is provided, but installation space is limited and installation/disassembly is inconvenient
Solution Approach 1:
The device is segmented into a first housing containing control mechanisms and a second housing containing contact assemblies, connected through a detachable connection. This modular design reduces installation space requirements and enables convenient installation and disassembly while maintaining complete protection functionality.
Solution Approach 2:
The first housing is detachably mounted on the second housing, with the electromagnetic mechanism and tripping mechanism nested within the first housing, and contact assemblies nested within the second housing. This nested structure compactly organizes components to minimize installation space while preserving all protection functions.
3Reliability
If existing SPD protection device is used, then protection is provided, but the protection function is single and difficult to apply to different circuit specifications
Solution Approach 1:
The device integrates multiple protection functions into a single apparatus: electromagnetic surge protection, thermal overload protection through the fuse, and manual isolation capability. The detachable housing design and standardized contact assemblies enable adaptation to different circuit specifications while maintaining comprehensive protection functionality.
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, compact, and easily installable protection with improved safety by eliminating blind spots in current threshold detection and integrating a fuse for better protection against electrical surges.
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
Data Source
AI summary
A circuit protection apparatus has a first housing, a handle assembly installed in the first housing, and a tripping mechanism installed in the first housing. The handle assembly is connected to the tripping mechanism. The tripping mechanism has a first output end, an electromagnetic mechanism installed in the first housing. The electromagnetic mechanism has a movable second output end that is used for contacting with the tripping mechanism. The first housing is detachably mounted on the second housing. A moving contact assembly is installed in the second housing and the first output end is connected to the moving contact assembly for forming a main electrical connection when the first output end is in the first position and for breaking the main electrical connection when the first output end is in the second position.