Penetration Terminal for Antenna Connection Verification
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Solution Overview
Problem
Conventional methods fail to accurately verify the connection state of antennas and coaxial cables inside electric apparatuses, especially in sealed environments filled with gases like air or SF6, due to vibration and disconnection issues, making it difficult to ensure reliable partial discharge measurement and insulation monitoring.
Innovation Solution
A device with a penetration terminal connecting coaxial cables inside and outside the apparatus frame, allowing for capacitance measurement to determine the connection state of antennas and cables from the outside, using a detection unit to assess the combined capacitance of the antenna and coaxial cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric apparatus is sealed and filled with gas for cooling and insulation, then the insulation performance and cooling efficiency are improved, but the verification of antenna and cable connection state becomes difficult
Solution Approach 1:
The patent introduces a penetration terminal as an intermediary component that passes through the sealed frame. This terminal provides a connection path from the interior (antenna and cable) to the exterior verification device, enabling connection state verification without compromising the sealed structure's insulation performance
Solution Approach 2:
The verification function is extracted from the interior components and implemented externally. The verification device is placed outside the sealed apparatus, and only the necessary penetration terminal is introduced through the frame, allowing connection verification while maintaining the sealed environment
2Productivity
If the cable is allowed to move for cooling gas circulation, then the cooling efficiency is improved, but the cable may disconnect due to vibration and sliding
Solution Approach 1:
The patent implements a feedback mechanism where the verification device continuously or periodically checks the connection state of the cable through the penetration terminal. When disconnection or abnormality is detected, the system can alert operators to check and secure the cable connection, ensuring reliable operation during cooling gas circulation
3Difficulty of detecting and measuring
If conventional verification methods using testing impedance or bridge circuits are used, then connection verification is possible, but the device complexity increases
Solution Approach 1:
The patent extracts the essential verification function from complex conventional circuits (testing impedance, bridge circuits with multiple resistors and photocouplers) and implements it through a simplified external verification device that measures impedance or capacitance through the penetration terminal, reducing overall system complexity
Solution Approach 2:
The penetration terminal serves as a simple intermediary that enables verification without requiring complex internal circuit modifications. The external verification device performs all necessary measurements through this single penetration point, avoiding the need for complex testing equipment inside the sealed apparatus
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
Enables reliable verification of antenna and coaxial cable connections from outside the apparatus, enhancing the reliability of partial discharge measurement and insulation monitoring by determining the presence or absence of disconnections and ensuring proper wiring.
Implementation Method 1
by measuring, in an outer side of the frame, a combined capacitance of the antenna and the first coaxial cable mounted in an inner side of the frame, connection states of the antenna and the first coaxial cable are verified
Data Source
AI summary
A penetration terminal for connecting the coaxial cables inside and outside of the apparatus thereto is attached on the electric apparatus' frame, and the measurement of a combined capacitance of the antenna and the coaxial cable in the inner side of the apparatus is made possible from the outer side of the apparatus, so that it is possible to perform at any time the determination whether a wiring connection of the antenna mounted in the inner side of the electric apparatus is appropriate.