GE POWER/VAC 4.16 - Equipment Operation; Breaker Installation and Removal

PULL
CONTROL
WIRING
BEHIND
TRACK
MECHANISM
co
TRACK
MECHANISM
ROLLOUT
'
iN
^
arrOM
COMPARTMENT
*
/
>
a
s
(
N
O
SO
CO
00
tu
Fig
.
36
Control Cable
Guide
furnished
,
the
caps
are
removed
in
order
to
attach
ground
-
ing
cables
.
The
purchaser
must
replace
the
ground
stud
caps
^
after
testing
and
/
or
maintenance is
complete
.
When
transformers
are
furnished
to
supply
the
control
power
,
the
primary
taps
should
be
selected
so
that
the
con
-
trol
voltage
indicated
on
the
wiring diagram
is obtained
on
the
secondary
of
the
transformer
.
When
a
battery
is
used
to
supply
the control
power
,
the cables
from
the
battery
to
the
switchgear
should
be
large
enough
to
avoid excessive
volt
-
age
drop
.
The
voltage
at
the
terminals
of
the breaker
closing
coils
,
when the breaker
is
being
closed
,
should
not
be less
than
112.5
volts
for
125
-
volt
coils
and
225
volts
for
250
-
volt
coils
.
OPERATION
The
metal
-
clad
switchgear
provides
safe
operation
and
easy
removal and
replacement
of
the circuit
breaker
.
Circuit
breakers
of
the
same
type
,
rating
and
duplicate
wiring
may
be
interchanged
.
Various
interlocks
are
provided
between
the
metal
-
clad and breaker
to
insure
safe
operation
.
The
following
instructions
explain
how these
interlocks
should
function
.
If
the
breaker
and metal
-
clad do
not
function
in
the
manner
called
for
in
these instructions
,
do
not
force
,
modify
,
adjust
or
remove
any
interlocks
.
Consult
your
local
General
Electric
Company
Apparatus
and
Service
Engi
-
neering
office
for
instructions
.
Failure
to
adhere
to
the
fol
-
lowing
instructions
could
result
in
serious
injury
.
The
operation
of
the
breaker
with its
associated
devices
may
be tested
in
the unit while
the
equipment
control
power
is
energized
by
racking
the breaker into the
test
position
and
engaging
the
secondary
coupler
.
This
is
accomplished
by
lowering
the
handle
on
the
right
-
hand
side
of
the breaker
mechanism
and
pushing
forward until
the
coupler
engages
.
High
-
potential
tests
to
check
the
integrity
of
the
insula
-
tion
are
not
necessary
if
the
insulation
instructions
in
this
book
are
carefully
followed
.
Should
the
purchaser
desire
to
make
high
-
potential
tests
,
the
“
test
voltage
”
should
not
exceed
14
kV
alternating
current
for
4.16
kV
and
27
kV
alternating
current
for
13.8
kV
equipment
.
These
voltages
are
75
percent
of
factory
test
voltages
and
are
in
accordance
with
ANSI
standards
.
BREAKER
INSTALLATION
AND
REMOVAL
With
all
primary
and
control
power
circuits
de
-
energized
and
before
installing
the
breaker
,
clean
the
mating
surfaces
of
the
metal
-
clad
and
circuit
breaker
primary
disconnects
,
secondary
disconnects
and
ground
shoe
,
and
apply
a
thin
coating
of
0282
A
2048
P
009
contact
grease
.
This will
prevent
galling
of
the
silvered
contact
surfaces
.
Check
the
racking
mechanism
to
make
certain
that
it
is
in
the
disconnect
position
,
see
Fig
.
37
.
The
tape
indicator
Voltage
transformers
,
control
power
transformers
,
surge
arresters
and
surge
suppressors
must
be
disconnected
during
high
potential
testing
.
When
bus
ground
studs and
caps
are
36
Courtesy of NationalSwitchgear.com