Last Updated：2025/11/29
A device used on electrical and telecommunications systems to protect the insulation and conductors from the damaging effects of lightning. Typically, it has a high-voltage terminal and a ground terminal. When a surge travels along the power line to the arrester, the current from the surge is diverted through the arrester, in most cases to earth.
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lightning arrester
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Source Word
lightning arrester
Noun
A
device
used
on
electrical
and
telecommunications
systems
to
protect
the
insulation
and
conductors
from
the
damaging
effects
of
lightning.
Typically,
it
has
a
high-voltage
terminal
and
a
ground
terminal.
When
a
surge
travels
along
the
power
line
to
the
arrester,
the
current
from
the
surge
is
diverted
through
the
arrester,
in
most
cases
to
earth.
Japanese Meaning
避雷器：電気および通信システムで、雷によるダメージから絶縁材や導体を保護するために用いられる装置。通常は高電圧側の端子と接地側の端子を持ち、雷サージが発生した際にその電流を地面に逸らす機能を持つ。
Sense（1）
A
device
used
on
electrical
and
telecommunications
systems
to
protect
the
insulation
and
conductors
from
the
damaging
effects
of
lightning.
Typically,
it
has
a
high-voltage
terminal
and
a
ground
terminal.
When
a
surge
travels
along
the
power
line
to
the
arrester,
the
current
from
the
surge
is
diverted
through
the
arrester,
in
most
cases
to
earth.
（ plural ）
