Loadbreak Connector Safety Probe with Resistance Section
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Solution Overview
Problem
Loadbreak electrical connectors face a high risk of flashover to the ground and switching failures due to the existing probe design, which does not adequately manage current flow during make or break operations.
Innovation Solution
The introduction of a safety probe with a resistance section between the conductive connector body and the arc quenching section, where the resistance section is made of high resistance material to reduce current flow before contact with the arc quenching section, mitigating arcing and flashover risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a conventional probe with arc quenching material is used, then arcing and gases are reduced during make or break operations, but the risk of flashover to the ground and switching failures remains high
Solution Approach 1:
The probe is divided into three distinct sections: a conductive section for current conduction, a resistance section for current limiting, and an arc quenching section for arc suppression. This segmentation allows each section to perform its specific function optimally, resolving the contradiction by preventing flashover while maintaining arcing reduction
Solution Approach 2:
The resistance section acts as an intermediary element between the conductive section and the arc quenching section. It limits current flow during the make or break operation, preventing excessive current from reaching the arc quenching section and causing flashover to ground, thereby improving reliability
2Power
If the probe allows high current flow during make or break operations, then the arc quenching material can effectively quench arcs, but flashover to the ground and switching failures occur
Solution Approach 1:
The resistance section is positioned to engage first during make or break operations, preliminarily limiting current flow before the arc can fully develop. This preliminary current limitation prevents the conditions necessary for flashover and switching failures while still allowing the arc quenching section to perform its function
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 safety probe effectively reduces the risk of flashover and switching failures by managing current flow, ensuring safe and reliable operations during load make or break operations in high voltage power distribution equipment.
Implementation Method 1
The resistance section acts as a resistor to reduce current flow in this section of the safety probe prior to contact with the conductive section or arc quenching section during load make or break operations
Implementation Method 2
The arc quenching material reduces the amount of arcing and gases created when an arc is initiated between the probe body and a female contact of a bushing insert or a junction during a make or break operation
Data Source
AI summary
A loadbreak electrical connector includes a connector body having first and second passages therewithin and a safety probe configured to be installed within the first passage. The safety probe includes a conductive probe body extending between first and second ends, the probe body having a probe aperture at the second end and a probe pin connected to the probe body via the probe aperture. The safety probe includes an arc quenching section located at a distal end of the probe pin and has a resistance section located between the second end of the probe body and the arc quenching section. The resistance section is made of a highly resistance material which reduces current flow through this section of the safety probe.