overheadelectric00stilrich.pdf

331
8/18/2019 overheadelectric00stilrich.pdf http://slidepdf.com/reader/full/overheadelectric00stilrichpdf 1/331

Transcript of overheadelectric00stilrich.pdf

necessary
calculations
of
energy
wasted
in
conduc-
tors
Estimation
of
percentage
transmission
lines
overhead
transmission
line
and
apparatus
tinuous
Current
and
Three-phase
transmissions
Concluding
remarks
8/18/2019 overheadelectric00stilrich.pdf
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INTRODUCTORY AND
case of
any
inter-
mediate
points
where
switching
stations
may
be
provided.
As
a
protection
against
line
efficiency.
1.
when
the
voltage
is
high
than
when
it
is
low;
but,
on
each
particular
transmission,
there
is
a
limit
to
the
three
outgoing
currents
is
zero
(since
they
intellect,
effects of
stringing
the
wires.
PRELIMINARY
Fixing
average hydro-
consequence
whether
the
transmission
is
by
will
be
large.
The
economical
use,
whatever
may
be
the
length
of
the
line,
or
the
pressure
required
at
the
receiving
end.
It
cost determines the size
forming
the
transmission
line,
and
the
PR
losses
therein,
and
Cost
of
Energy
Wasted
in
real
practical
value.
There
and
expressed
found in
often
be
higher
than
if
copper
is
used,
partly
on
long
spans
on
an
the
line.
These
approximations
involve
no
errors
of
practical
importance;
but
it
smaller
current
in
the
several
circuits,
100,000-volt
line
at
all
times
through
lay
down
rules
to
from
wave.
Now,
down
ors,
thus
raising
theValue
of
the
voltage
necessary
to
break
down
in-
terest
to
the
practical
as
the
dis-
ruptive
critical
voltage
for
any
particular
wire
under
specified
atmospheric
conditions,
is
that
voltage
which
produces
a
expected
between
conductor
and
tower
or
pole
approximating
the
conductors.
The
frequency
to
5000
cycles
per
grounded
metal
pipe
on
to
the
high-tension
conductors,
a
high-
resistance
non-inductive
path
to
ground
is
provided
for
the
extra-high
potential
charges
on
the
line;
but
there
will
be
very
little
leakage
of
power
current.
types
electrostatic
capacity
between
consecutive
cylinders,
and
between
maximum
potential
difference
between
cylinders
is
considerably
equal
division
of
the
total
potential
difference,
and
of a
ground
is
momentarily
closed.
On
re-opening,
a
suitable
resistance
is
inserted
before
the
final
break,
to
prevent
the
formation
of
oscillating
currents
resistance metal.
on
a
small
two-generator
plant
in
Russia.
In
motor,
it
may
be
short-circuited
by
a
switch
stretch
under
the
influence
is
perfectly
elastic
up
to
a
certain
critical
I
Difference
in
Temperature
-Degrees
Fahrenheit
i
i
few
minutes,
while
iron
wire
took
a
the
possibility
of
sleet
falling
suddenly
wires,
weather
conditions,
being
the
ratio
W/'w.
k
times
the
For
mechanical
reasons,
it
is
a
general
between
a
period
period
of
one
to
three
hours.
This
process
will
permit
months
harden
the
tensions
on
each
side
tion,
firmly
The
full
advantage
of
the
galvanized
or
painted
by
the
breaking
are
undoubtedly
helpful
at
the
advocates of
sometimes
section line to
rotate on the
x
taken
that
are
not
in
tension
will
be
somewhat
greater
than
in
the
\/2D
from
conduc-
tor
1,
as
shown
only
one
wire
remains
in
faulty
span;
weight
of
the
wires
point
A
due
to
the
half
span
problems by
the bottom conductors
rail. As a
carried
far
enough
to
ensure
that
allowed
to
slack
back
against
the
tie
wire
except
where
permanently
secured
to
poles
with
double
fixtures.
When
joints
are
required
in
the
conductors,
they
to
be
followed,
if
the
use
of
special
structures,
and
high
side.
In
selecting
tower
85
voltages
61