Arc-Extinguishing Assembly for Easier Overvoltage Protector Manufacturing
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Solution Overview
Problem
Existing overvoltage protection devices face difficulties in manufacturing due to the complexity of assembling the arc-extinguishing device, which is made difficult by the need to fit it onto the casing before connecting other components and requires holding the insulating blade in position during soldering operations.
Innovation Solution
The arc-extinguishing device is pre-assembled with a mobile insulating blade and a return elastic element, allowing it to be positioned relative to the protection elements after the heat-sensitive disconnector device is connected, simplifying the manufacturing process by facilitating the integration of the arc-extinguishing device with the protection elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the arc-extinguishing device is assembled onto the casing before connecting other components, then the device provides overvoltage protection with arc extinction capability, but the manufacturing process becomes complex and difficult to assemble
Solution Approach 1:
The insulating blade is pre-positioned in a retracted position during assembly, allowing the heat-sensitive disconnector to be connected first. The blade will automatically deploy to its active position only after the disconnector is properly connected and secured, simplifying the manufacturing process while ensuring proper functionality.
Solution Approach 2:
The insulating blade is designed as a mobile component that can transition between retracted and deployed positions. This dynamic design allows the blade to be in a non-obtrusive retracted state during assembly, avoiding interference with soldering operations, and automatically moves to the deployed state when needed for arc extinction.
2Manufacturing precision
If the insulating blade is held in position during soldering operations, then proper electrical connection is achieved, but the assembly process becomes even more difficult
Solution Approach 1:
The insulating blade is pre-positioned in a retracted position that does not interfere with the soldering of the heat-sensitive disconnector. This preliminary positioning allows soldering operations to proceed without obstruction, while the blade remains in place to ensure proper final assembly geometry.
Solution Approach 2:
The insulating blade serves as an intermediary element that can be temporarily positioned in a retracted state during manufacturing operations. This intermediary positioning allows other components to be assembled and connected without interference, while the blade itself remains part of the final functional assembly.
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
This approach simplifies the manufacturing process by allowing the arc-extinguishing device to be positioned after the heat-sensitive disconnector is connected, reducing assembly complexity and making the device easier to manufacture.
Implementation Method 1
if an overvoltage on the varistor and the spark gap causes heating thereof above a temperature threshold so that the thermofusible solder melts
Implementation Method 2
a return member that exerts a return force tending to move the varistor and the spark gap away from each other
Implementation Method 3
at least one return elastic element that is adapted to urge said insulating blade relative to the cassette in the direction of the deployed position
Data Source
AI summary
A method of manufacturing an overvoltage protection device and a protection device obtained via the method are described. The method includes the steps of (1) electrically connecting a first electrode of a first protection element to a first electrode of a second protection element via a heat-sensitive disconnector device, (2) procuring a pre-assembled arc-extinguishing device that has a cassette, an insulating blade mobile inside the cassette, and at least one elastic element, and (3) moving the arc-extinguishing device until it reaches a final mounting position in which the heat-sensitive disconnector device bears against the insulating blade and pushes the insulating blade in the direction of a retracted position.