Method and system for the recognition of insulation defects

Details Method and system for the recognition of insulation defects Method and system for the recognition of insulation defects

1998-06-26

2000-10-31

Metjahic, Safet

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

In an ignitor or detonator

324550, 340436, G01M 1900

Patent

active

061408212

ABSTRACT:
The invention concerns a method for the recognition of insulation defects in a circuit adapted for connection to a low-ohmic current source or sink having off-load voltage U.sub.n0, Towards this end the circuit is initially subjected, in a separated state, to a diagnostic voltage from a current limited current source or sink whose off-load voltage U.sub.h0 corresponds to exceeds or, respectively, is less than the voltage U.sub.n0. A decision is made as to the presence or absence of an insulation defect based on the current and/or voltage dependence during application of the diagnostic voltage. Finally, in the event that a defect is present, an error message is issued and the low-ohmic current source or sink is not connected to the circuit for self-diagnosis. Otherwise, the low-ohmic current source is connected to the circuit, or the sink, in sequential fashion for self-diagnosis testing. In this fashion even hidden insulation defects are recognized. The invention also concerns a system for carrying out this method.

REFERENCES:
patent: 5268643 (1993-12-01), Aso

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