Conical Connector LPIT With Shielded Integrated Current Sensing
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Solution Overview
Problem
Installation of conventional current transformers around high voltage cables is cumbersome and time-consuming, and they require the cables to be bent or threaded through the transformer coils, which is difficult due to their large diameter.
Innovation Solution
A low power instrument transformer (LPIT) with integrated current and voltage sensors is embedded within a conical connector, surrounded by a resin and a shielding field electrode, and a resin, which integrates the sensors within the connector's interior, and a resin, which integrates the connector's interior, and a resin, which integrates the current and voltage sensors within the connector's interior, allowing for easy installation and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional current transformers are arranged around high voltage cables before plug-in connectors, then protection purposes are achieved, but installation becomes time-consuming and requires cable bending or threading through coils
Solution Approach 1:
The patent combines the current transformer and voltage transformer into a single integrated sensor arrangement that is installed within the plug-in connector housing. This merging of functions eliminates the need for separate external current transformer installation, reducing installation time while maintaining protection capabilities through the integrated sensing system.
Solution Approach 2:
The sensor arrangement is pre-installed within the plug-in connector housing before the high voltage cable is connected. This preliminary action allows the sensing components to be in place and ready for operation, eliminating the need for time-consuming post-installation setup or cable manipulation around external transformers.
2Measurement precision
If conventional current transformers are arranged around high voltage cables, then current measurement is achieved, but installation requires cable bending or threading which is difficult due to large cable diameter
Solution Approach 1:
The patent integrates both current and voltage sensing capabilities within the plug-in connector housing, eliminating the need for separate external current transformer installation. This combined approach allows measurement functions to be achieved without the operational difficulty of installing large external transformers around thick cables.
Solution Approach 2:
Instead of placing the transformer around the cable as in conventional designs, the patent inverts the approach by integrating the sensing components within the connector housing and having the cable pass through or connect to this pre-configured sensing arrangement. This reversal of the installation sequence and spatial relationship greatly simplifies installation while maintaining measurement accuracy.
3Productivity
If LPIT is integrated within connector interior, then installation time and space requirements are reduced, but sensor integration complexity increases
Solution Approach 1:
The patent divides the sensing system into distinct functional modules - a voltage sensor with ring-shaped electrode and a current sensor - that can be independently positioned and integrated within the connector housing. This segmentation allows for systematic integration that manages complexity while achieving compact installation and fast deployment.
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 LPIT enables easy installation of current and voltage sensors within the connector, reducing installation time and space requirements, and provides accurate measurements while protecting against external stray fields.
Implementation Method 1
The low power instrument transformer includes an electrode having a ring shape and including a voltage sensor for measuring a voltage of the current conductor
Implementation Method 2
The low power instrument transformer also includes a current sensor positioned to measure a current of the current conductor
Implementation Method 3
The shielding field electrode is disposed between the current sensor and the current conductor
Data Source
AI summary
A sensor arrangement for a gas-insulated switchgear is provided. The sensor arrangement includes a connector having a housing defining a hollow interior, a current conductor passing through the interior of the housing, a low power instrument transformer, a shielding field electrode, and a resin. The low power instrument transformer includes an electrode having a ring shape and including a voltage sensor for measuring a voltage of the current conductor. The low power instrument transformer also includes a current sensor positioned to measure a current of the current conductor. The shielding field electrode is disposed between the current sensor and the current conductor. The resin cooperates with and surrounds the current conductor, the voltage sensor, the current sensor and the shielding field electrode to fill the hollow interior.