JIS C 2136:2004 English Edition

Test method for evaluating resistance to tracking and erosion of electrical insulating materials used under severe ambient conditions

Abstract

This Standard describes two test methods for the evaluation of electrical insulating materials for use under severe ambient conditions at power frequencies (48 Hz to 62 Hz) by measurement of the resistance to tracking and erosion, using a liquid contaminant and inclined plane specimens. Method 1: constant tracking voltage; Method 2: stepwise tracking voltage. With the test apparatus, the track starts at the lower electrode. Two criteria for determining the end point of the test are in use. However, criterion A shall be given priority for use. Criterion B may be used only if it is required in relevant standards of the material. Criterion A: The end point is reached when the value of the current in the high voltage circuit through the specimen exceeds 60 mA and continues for 2 s or more. An overcurrent device then breaks this circuit. Criterion B: The end point is reached when the track reaches a mark on the specimen surface 25 mm from the lower electrode.

Details

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