System and Method for Detecting Voltage Dependence in Insulation Systems Based on Harmonic Analysis
AssigneeAVO Multi-Amp Corporation d/b/a Megger
InventorsNils Peter WERELIUS, Mats Gunnar OHLEN
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Abstract
A method of testing an insulation system is disclosed. The method comprises coupling a first test lead to a first conductor, the first conductor at least partly isolated by the insulation system and coupling a second test lead to a second conductor or a ground. The method further comprises applying a test signal to the first test lead, receiving a test response from the second test lead, and analyzing the test response from the second test lead to determine a harmonic content of the test response. The method further comprises, when the harmonic content is equal to or greater than a predetermined threshold, determining that the insulator system has non-linear properties.
Claims20
A method of testing an insulation system, comprising:
- coupling a first test lead to a first conductor, the first conductor at least partly isolated by the insulation system;
- coupling a second test lead to a second conductor or a ground;
- applying a test signal to the first test lead;
- receiving a test response from the second test lead;
- analyzing the test response from the second test lead to determine a harmonic content of the test response;
- and
- when the harmonic content is equal to or greater than a predetermined threshold, determining that the insulator system has non-linear properties.
A test set, comprising:
- a stimulator circuit to stimulate an insulation system of an electric apparatus with a test signal;
- a detector circuit to detect a response of the insulation system to the test signal;
- and
- a test controller to determine a harmonic content of the response, and when the harmonic content is equal to or greater than a predetermined threshold, to identify the insulation system to be non-linear.
A method of testing an insulation system, comprising:
- coupling a first test lead to a first conductor, the first conductor at least partly isolated by the insulation system;
- coupling a second test lead to a second conductor or a ground;
- applying a test signal to the first test lead;
- receiving a test response from the second test lead;
- analyzing the test response from the second test lead to determine a harmonic content of the test response;
- and
- determining the status of an electric apparatus associated with the insulation system based on the harmonic content of the test response.
Dependencies are inferred from the claim text.