Last Updated：2025/12/07
A test to measure the degree of deterioration of an electrical insulation which is performed at two temperature by applying AC voltage to the test object and measure the total current flow through it, and separating and comparing the reactive and resistance portions of the current passing through it.
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Tan Delta test
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Source Word
Tan Delta test
Noun
uncountable
A
test
to
measure
the
degree
of
deterioration
of
an
electrical
insulation
which
is
performed
at
two
temperature
by
applying
AC
voltage
to
the
test
object
and
measure
the
total
current
flow
through
it,
and
separating
and
comparing
the
reactive
and
resistance
portions
of
the
current
passing
through
it.
Japanese Meaning
電気絶縁体の劣化度を測定する試験。二つの異なる温度下で、試験対象に交流電圧をかけ、試験対象を流れる全電流の中から反応性成分と抵抗成分を分離・比較することで、絶縁体の状態や劣化の程度を評価するテスト。
Sense（1）
A
test
to
measure
the
degree
of
deterioration
of
an
electrical
insulation
which
is
performed
at
two
temperature
by
applying
AC
voltage
to
the
test
object
and
measure
the
total
current
flow
through
it,
and
separating
and
comparing
the
reactive
and
resistance
portions
of
the
current
passing
through
it.
