Vacuum-Based Test Device for Reliable Cable Insulation Testing
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Summary
Problems
Existing test devices for electrical cable insulation are inadequate in testing breakdown strength and are not suitable for vacuum conditions, leading to unreliable detection of error points and high operational complexity.
Innovation solutions
A test device with a tightly closable and evacuable chamber that completely encloses the electrical line, allowing for vacuum conditions and using electrical feedthroughs to ensure tightness, with a voltage source outside the chamber to apply a test voltage between the line and the chamber's electrode, enabling reliable breakdown strength testing without the need for test gas.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a tong-like test vessel is used to surround a portion of the cable, then the test chamber can be closed, but the test gas atmosphere becomes unreliable for detecting error points and the structure remains complex
Why choose this principle:
The patent uses a vacuum environment instead of test gas atmosphere to eliminate air interference in insulation testing. The chamber is evacuated to create a vacuum, providing a reliable inert environment for detecting error points without the complexity of test gas management systems.
Principle concept:
If a tong-like test vessel is used to surround a portion of the cable, then the test chamber can be closed, but the test gas atmosphere becomes unreliable for detecting error points and the structure remains complex
Why choose this principle:
The patent extracts and removes the test gas provision system entirely by using vacuum evacuation. This eliminates the harmful factor of test gas management complexity while maintaining the beneficial effect of a controlled atmosphere for reliable error point detection.
Application Domain
Data Source
AI summary:
A test device with a tightly closable and evacuable chamber that completely encloses the electrical line, allowing for vacuum conditions and using electrical feedthroughs to ensure tightness, with a voltage source outside the chamber to apply a test voltage between the line and the chamber's electrode, enabling reliable breakdown strength testing without the need for test gas.
Abstract
The invention relates to a test device ( 1 ) for testing the insulation of an electrical line ( 2 ), in particular a cable or a cable harness, for detecting error points in the insulation of the electrical line ( 2 ). The test device ( 1 ) comprises a scalable, evacuable chamber ( 3 ) for completely accommodating the electrical line ( 2 ) to be tested, wherein at least one electrical connection point ( 6 ), preferably in the form of a plug device part, for connecting the electrical line ( 2 ) to be tested is arranged inside the chamber ( 3 ) and an electrical feedthrough ( 7 ) leads from the connection point ( 6 ) out of the chamber ( 3 ).