Transformer Maintenance Knowledge Vault

Dielectric Breakdown Voltage Testing - Part 4

The D1816 dielectric breakdown voltage is a more sensitive method of dielectric breakdown voltage testing and is generally more useful than the D877 testing method under many circumstances. This method is sensitive to dissolved gases in the oil. As a result, high dissolved gas content in the insulating oil sample may depress the D1816 value to the point where it is outside the acceptable range. In short, oil that is acceptable in every respect that affects its performance in electrical equipment may still "fail" the D1816 determination because of dissolved gas content.

Dielectric Breakdown Voltage Testing - Part 5

When D1816 test results are outside of the acceptable range, the first consideration is to cross reference the results to moisture, liquid power factor, and liquid screen tests to identify possible causes.

PCB Testing - Part 1

In Part 1 of a two-part series on PCB testing, we will present some background information on PCB's, address when PCB testing is appropriate, and describe how a typical laboratory may perform PCB testing.

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Dielectric Breakdown Voltage Testing - Part 4

Dielectric Breakdown Voltage Testing - Part 5

PCB Testing - Part 1

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