Shielded Enclosure for Circuit Interruption Testing
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Solution Overview
Problem
Existing testing methods for circuit interruption devices pose hazards due to exposure of high voltage and high current, which can lead to electrical hazards and the generation of hazardous X-rays, especially in industrial environments.
Innovation Solution
A testing apparatus with an enclosure that houses the circuit interruption device and automatically connects necessary instrumentation for testing within the enclosure, preventing exposure and using shielding to block X-rays, allowing for safe and controlled testing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high voltage and high current are applied to the circuit interruption device for testing, then testing can be performed to assess device integrity, but electrical hazards and X-ray generation occur creating safety risks
Solution Approach 1:
The testing system is divided into separate functional modules: high voltage generation module, high current module, control module, and display module. Each module operates independently within the enclosure, allowing testing functions to be performed while maintaining safety through spatial separation of hazardous components.
Solution Approach 2:
The microprocessor-based control module acts as an intermediary between the operator and the high voltage/current components. It automatically controls the testing sequence, monitors parameters, and manages the testing process, eliminating the need for manual intervention with exposed electrical components while still enabling comprehensive device assessment.
2Ease of operation
If the circuit interruption device is removed from switchgear cabinet for testing, then testing can be performed, but electrical cables and conductors are exposed creating hazards in industrial environment
Solution Approach 1:
The testing apparatus combines multiple functions into a single integrated unit: the circuit interruption device receives, the high voltage and high current testing capabilities, the control system, and the display all within one enclosure. This eliminates the need for external cable connections and exposes no electrical components to the industrial environment.
Solution Approach 2:
The enclosure creates a controlled, isolated environment for testing operations. All high voltage and high current operations occur within this enclosed space, effectively containing electrical hazards and preventing interaction with the external industrial environment, similar to creating an inert atmosphere for safety.
3Reliability
If high current is applied during vacuum integrity testing, then vacuum integrity can be assessed, but X-rays are generated creating additional hazards
Solution Approach 1:
The enclosure is designed to shield against X-rays generated during high current testing, converting the harmful X-ray radiation into a contained phenomenon. The shielding structure protects operators and surrounding areas while allowing the high current testing necessary for vacuum integrity assessment to proceed.
4Extent of automation
If instrumentation is manually connected to the circuit interruption device, then testing can be performed, but exposure to high voltage and high current creates safety risks
Solution Approach 1:
The circuit interruption device is designed with built-in test terminals and integrated connectors that automatically align and connect with the testing apparatus when the device is placed in the enclosure. This self-aligning connection system eliminates manual wiring operations near high voltage components, allowing the device to essentially test itself under automated control.
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 safe and controlled testing of circuit interruption devices by containing all electrical connections and instrumentation within a shielded enclosure, reducing hazards associated with high voltage and current exposure and X-ray emission.
Implementation Method 1
the enclosure itself is configured to resist the transmission of X-rays therethrough
Data Source
AI summary
A testing apparatus that is usable with a circuit interruption apparatus includes an enclosure that is similar to a switchgear enclosure and within which the circuit interruption apparatus for testing is received. The testing apparatus includes instrumentation that is automatically electrically connected with the circuit interruption apparatus when the circuit interruption apparatus is received within the interior region of the enclosure, and the instrumentation is operable to perform various tests on the circuit interruption apparatus. The testing apparatus further includes output devices and a switching apparatus at the exterior of the enclosure that enable a technician to control testing operations that are performed on the circuit interruption apparatus and to view the results of the testing operations. All of the electrical connections with the circuit interruption apparatus are made within the interior region of the enclosure, and the enclosure itself is configured to resist the transmission of X-rays.