GE POWER/VAC 4.16 - Cable Terminations (Potheads); Cable Terminations (Without Pothead); Ground Fault Current Transformers

POTHEADS
GROUND
FAULT
CURRENT
TRANSFORMERS
(
THROUGH
-
TYPE
)
Installation
procedures
for
a
three
-
conductor
lead
-
sheathed
cable
with
a
wiping
sleeve
cable
entrance
Fitting
on
the
pothead
are
outlined
in
Russgreen
Cat
.
No
.
P
66
.
This
is
the
type
most
generally
used
.
The
factory
does
not
furnish
insulating
materials
for
completing
stress
cones
and
cable
terminations
.
In
all
cases
,
carefully
follow
the
cable
manu
-
facturer
’
s
recommendation
for
installation
of
the
type
cable
being
used
.
Through
-
type
current
transformers
(
see
Fig
.
35
)
are
furnished
where
specified
for
sensitive
protection
against
ground
faults
.
These
transformers
are
normally
installed
in
a
horizontal
position
directly
above
or
below
the
primary
cable
terminals
so
that
the
primary
cable
or
cables
can
pass
through
them
.
One
transformer
is
required
for
each
three
-
phase
circuit
.
Where
armored
cable
is
used
,
the
armor
must
be
termin
-
ated
and
grounded
before
the
cable
passes
through
the
transformer
.
Armor
clamps
are
furnished
for
this
purpose
when
specified
.
TERMINATION
WITHOUT
POTHEAD
The
factory
does
not
furnish
insulating
materials
for
com
-
pleting
the
termination
of
primary
cables
,
nor
does
it
furnish
stress
cone
material
.
The
cable
manufacturer
’
s
recommen
-
dations
should
be
followed
for
the
type
of
cable
being
used
.
When
stress
cones
are
required
,
packaged
stress
cone
kits
such
as
the
GE
Termi
-
Maticrr
Cable
Termination
System
are
frequently
used
.
Information
and
ordering
data
can
be
found
in
GEA
-
1017
.
Since
the
termination
is
inside
the
metal
-
clad
enclosure
,
the
Indoor
Type
A
system
is
generally
applicable
.
If
excessive
contamination
is
a
problem
,
the
padmount
type
G
system
may
be
desirable
.
No
matter
which
system
is
used
,
step
-
by
-
step
pictorial
instructions
will
be
furnished
as
part
of
the
kit
.
The
space
provided
for
primary
cable
terminations
in
the
standard
Power
-
Vac
arrangements
is
more
than
sufficient
for
the
Termi
-
MaticT
system
.
Hand
-
taped
stress
cones
require
more
space
.
However
,
the
cable
termination
space
provided
in
Power
/
Vac
*
is
never
less
than
the
minimum
recommended
for
a
hand
-
taped
stress
cone
.
«
r
-
CN
In
making
up
stress
cone
terminations
,
ground
clamps
and
ground
leads
are
installed
.
Care
must
be
taken
to
assure
that
these
grounded
elements
are
installed
such
that
the
required
clearance
to
energized
parts
is
maintained
.
For
insulated
bars
or
unshielded
cables
,
these
are
s
oo
oc
U
-
For
5
kV
equipments
—
at
least
2
inches
For
15
kV
equipments
—
at
least
3
inches
When
terminating
three
conductor
cables
which
flare
out
to
single
conductor
terminations
,
the
crotch
at
the
root
of
the
flare
-
out
should
be
adequately
sealed
to
prevent
possible
entrance
of
moisture
into
the
three
conductor
jackets
.
Fig
.
35
Rear
View
of
Unit
Showing
Through
-
Type
Ground
Fault
Current
Transformers
For
long
cable
runs
within
the
equipment
,
a
support
to
restrain
lateral
movement
of
the
cables
under
short
circuit
conditions
will
be
provided
approximately
20
inches
from
the
termination
point
.
The
customer
’
s
incoming
cables
should
be
lashed
securely
to
this
support
.
There
is
no
provision
in
the
Power
/
Vac
*
equipment
to
support
the
weight
of
primary
cables
.
t
34
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