|Description / Abstract
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|This test method covers the determination of the dielectric
breakdown voltage of insulating liquids (oils of petroleum origin,
silicone fluids, high fire-point mineral electrical insulating
oils, synthetic ester fluids and natural ester fluids). This test
method is applicable to insulating liquids commonly used in cables,
transformers, oil circuit breakers, and similar apparatus as an
insulating and cooling medium. Refer to Terminology D2864 for
definitions used in this test method.
This test method is sensitive to the deleterious effects of
moisture in solution especially when cellulosic fibers are present
in the liquid. It has been found to be especially useful in
diagnostic and laboratory investigations of the dielectric
breakdown strength of insulating liquid in insulating
This test method is used to judge if the VDE electrode breakdown
voltage requirements are met for insulating liquids. This test
method should be used as recommended by professional organization
standards such as IEEE C57.106.
This test method may be used to obtain the dielectric breakdown
of silicone fluid as specified in Test Method D2225 and
Specification D4652, provided that the discharge energy into the
sample is less than 20 mJ (milli joule) per breakdown for five
Both the metric and the alternative inch-pound units are
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
2 Supporting data is available from ASTM
Headquarters. Request RR:D27-1006.
*A Summary of Changes section appears at the end of this
|Additional Supplemental Documents