Variable-Diameter Compression Zone for High-Voltage DC Interrupters
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Solution Overview
Problem
Existing electrical interruption switches struggle to safely interrupt high DC currents at high voltages without fragmenting the compressor area, leading to potential electrical shorts between the separated contacts and the housing.
Innovation Solution
The design incorporates a pipe-shaped or rod-shaped compressor area with rejuvenations in its cross-sectional area, which minimizes fragmentation during separation, and flanges that allow the compressor area to be immersed without electrical contact with the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tubular or hollow-cylindrical compression area is used to enable easy folding during compression, then the separating ends can be mechanically separated, but the rapid movement and compression cause it to shatter, creating impermissible electrical contact with the housing
Solution Approach 1:
The compression area is designed with a varying cross-sectional diameter along its longitudinal axis, creating zones of different structural strength and flexibility. This parameter variation allows the compression area to fold easily in designated regions while maintaining structural integrity in other areas, preventing shattering and electrical contact with the housing
Solution Approach 2:
The compression area is divided into multiple zones with different cross-sectional diameters, creating segments with distinct functional properties. The narrower sections provide flexibility for folding, while wider sections provide structural strength to prevent fragmentation and maintain electrical insulation
2Productivity
If a sabot is used to separate the connecting elements, then the separating ends can be mechanically separated, but the rapid movement causes the compression area to shatter, potentially creating electrical contact with the housing
Solution Approach 1:
The varying cross-sectional diameter of the compression area is specifically designed to accommodate high-speed separation forces. The gradient in diameter creates a structural profile that dissipates impact energy progressively, preventing catastrophic failure and maintaining electrical insulation even during rapid sabot-driven separation
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 design effectively prevents fragmentation of the compressor area, ensuring electrical insulation between the separated contacts and the housing, thus safely interrupting high DC currents at high voltages.
Implementation Method 1
The sabot is designed such that it can be moved from an initial position to an end position by an applied pressure
Implementation Method 2
The compression area is designed in such a way that it is compressed when the sabot moves from the starting position to the final position
Data Source
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AI summary
The invention relates to an electrical interrupting switching element, which is particularly suitable for interrupting high currents at high voltages. It has a housing that encompasses a contact unit defining the current path through the interrupting switching element. The contact unit has a first and second terminal contact, a separation zone, and a compression zone. The contact unit is designed such that current can be supplied to it via the first terminal contact and discharged from it via the second terminal contact, or vice versa. The contact unit has or is connected to a motive mirror. The motive mirror is designed such that it can be moved from a starting position to an end position by an applied pressure, wherein in the end position of the motive mirror the separation zone is closed and an insulation distance between the first and second terminal contacts is achieved.The compression zone is designed such that it is compressed when the drive mirror moves from its starting position to its end position. The interruption switching element according to the invention is characterized in that the compression zone is designed as a tubular or rod-shaped element whose axial extension direction runs along an axis X, wherein the tubular or rod-shaped element has one or more tapers in its cross-sectional diameter, the cross-sectional diameter being defined perpendicular to the axis X.