Last Updated：2022/12/23
Sentence
When
a
driver
approaches
a
neutral
section
separating
sections
of
25
kV.
and
15
kV.
overhead
catenary,
he
trips
the
main
circuit-breaker
but
keeps
his
pantographs
up;
as
soon
as
the
next
section
of
live
wire
is
reached,
he
re-sets
his
contact-breaker,
whereupon
voltage-sensitive
relays
automatically
make
appropriate
connections
to
the
auxiliary
circuits.
Quizzes for review
When a driver approaches a neutral section separating sections of 25 kV. and 15 kV. overhead catenary, he trips the main circuit-breaker but keeps his pantographs up; as soon as the next section of live wire is reached, he re-sets his contact-breaker, whereupon voltage-sensitive relays automatically make appropriate connections to the auxiliary circuits.
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English - English
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