Electromagnetic Rapid Safety Switch for Reusable Sub-1 ms Tripping
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Solution Overview
Problem
Existing safety switches, particularly those below 1000V nominal voltage, face challenges in achieving fast switching times and reusability, with complex structures and limited reliability in medium-voltage applications.
Innovation Solution
A fast safety switch design featuring a spring memory and electromagnetic trigger, with a movable contact system that allows for simultaneous contact of multiple poles within 1ms, utilizing a current tape contact combination and segmented fixed contact fingers for enhanced reliability and modular assembly, enabling quick switching and reactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single-pole switch with explosive charge is used to achieve switching times below 5ms, then switching speed is improved, but reusability deteriorates (switch cannot be reused after tripping)
Solution Approach 1:
The patent divides the switch into multiple independent poles (first pole, second pole, third pole) that can operate independently. Each pole has its own moving contact and fixed contacts, allowing individual operation and resetting. This segmentation enables the switch to be reusable after tripping, as each pole can be reset independently without affecting the others.
Solution Approach 2:
The patent implements a preliminary latching mechanism that pre-positions the moving contacts in the closed position before tripping occurs. The latching mechanism holds the contacts in place, and upon tripping, the contacts are rapidly moved to the open position. After tripping, the latching mechanism can be reset to prepare for the next operation, enabling reusability.
2Speed
If an electromagnetic drive switches three poles simultaneously, then switching speed is improved, but device complexity increases
Solution Approach 1:
The patent employs spring-loaded mechanisms for each pole that automatically return the moving contacts to the closed position after tripping. The springs are pre-compressed and provide the restoring force needed to reset the contacts without requiring external actuation. This self-service mechanism simplifies the overall structure by eliminating the need for complex resetting systems while maintaining fast switching capability.
Solution Approach 2:
The patent divides the three-pole switch into three independent pole units, each with its own moving contact, fixed contacts, and spring mechanism. This segmentation allows each pole to operate independently with simple individual mechanisms rather than requiring a complex integrated system to coordinate all three poles simultaneously.
3Volume of moving object
If fixed contacts are arranged close to moving contact for compact design, then device size is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent designs the fixed contacts with movable mounting elements that can adjust their position dynamically during operation. The fixed contacts are mounted on adjustable supports that allow for minor position adjustments to ensure proper alignment with the moving contacts. This dynamic adjustment capability compensates for manufacturing tolerances and ensures reliable contact engagement without requiring extremely tight manufacturing precision.
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 solution achieves rapid switching times below 1ms, improved reliability, and reusability, addressing the limitations of existing safety switches by ensuring efficient and reliable electrical connections across multiple poles.
Implementation Method 1
The fast safety switch can be unlatched with an electromagnetic release
Data Source
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AI summary
The invention relates to a rapid safety switch (100). The rapid safety switch (100) has a switch housing (110), said switch housing (110) having: - six outer housing faces (112), comprising a front housing face (113), an open rear housing face (114), an upper housing face (115), a lower housing face (116), a first housing face (117), and a second housing face (118), - an operating tool interface (120) which can be operated through one of the outer housing faces (112), and - one or more connection elements (130) for controlling the rapid safety switch (100), wherein the rapid safety switch (100) can be unlatched by an electromagnetic trigger (300), and the rapid safety switch (100) has a moving contact (200).