GE POWER/VAC 4.16 - Introduction; General Safety Instructions; Introduction to Metal-Clad Switchgear

POWER
/
VAC
*
METAL
-
CLAD
SWITCHGEAR
TYPES
4.16
AND
13
.
B
FOR
POWER
-
VAC
CIRCUIT
BREAKER
TYPES
VB
-
4.16
,
VB
-
7.2
,
VB
-
13.8
,
VB
1
-
4.16
,
and
VB
1
-
13.8
»
INTRODUCTION
Metal
-
clad
switchgear
is
equipment
designed
for
the
pro
-
tection
,
instrumentation
and
control
of
various
types
of
electrical
apparatus
and
power
circuits
.
and
4
.
The
equipment
is
not
designed
for
exposure
to
dripping
liquids
as
this
condition
is
not
a
usual
ANSI
service
condition
.
Dripping
liquids
can
destroy
the
integrity
of
the
insulation
system
and
must
be
avoided
.
The
switchgear
consists
of
one
or
more
vertical
sections
which
are
mounted
side
by
side
and
connected
mechanically
and
electrically
to
form
a
complete
switching
equipment
.
Typical
pieces
of
equipment
are
shown
in
Figs
.
1
,
2
and
3
.
NOMINAL
INTER
-
CONTINUOUS
CURRENT
RLJPTING
TYPE
EQUIP
-
MENT
MAXIMUM
The
circuit
breakers
are
easily
removable
to
provide
maximum
accessibility
for
maintenance
with
minimum
interruption
of
services
.
The
switchgear
is
designed
to
pro
-
vide
a
high
degree
of
safety
to
the
operator
.
All
equipment
is
enclosed
in
grounded
metal
compartments
.
The
equipment
is
available
in
the
ratings
listed
in
the
following
table
.
The
ratings
of
the
equipment
and
devices
are
based
on
usual
service
conditions
as
covered
in
ANSI
stan
-
dards
.
Operation
at
currents
above
the
equipment
rating
will
result
in
temperature
rises
in
excess
of
these
standards
,
and
is
not
recommended
.
For
outdoor
installation
the
same
basic
equipment
is
built
into
a
weatherproof
housing
as
in
Figs
.
2
,
3
CAPACITY
CIRCUIT
BREAKER
VOLTAGE
KV
AMPERES
MV
A
VM
-
4.16
VB
-
4.16
-
250
4.76
1200
-
2000
250
VM
-
4.16
VB
-
4.16
-
350
1200
-
2000
350
4.76
3000
VM
-
13.8
8.25
1200
-
2000
VB
-
7.2
-
500
500
1200
-
2000
VB
-
13.8
-
500
15.0
500
VM
-
13.8
15.0
1200
-
2000
VM
-
13.8
VB
-
13.8
-
750
750
1000
VM
-
13.8
VB
-
13.8
-
1000
15.0
1200
-
2000
3000
FOR
VB
-
1
SERIES
SEE
GEK
86132
A
SAFETY
Each
user
is
responsible
for
communicating
all
safety
in
-
structions
and
practices
to
personnel
associated
with
this
equipment
.
The
following
practices
should
be
included
in
a
user
’
s
safety
program
.
These
do
not
supplant
the
user
’
s
responsi
-
bility
for
devising
a
complete
safety
program
.
They
are
rather
suggestions
concerning
some
aspects
of
personnel
safety
related
to
circuit
breakers
and
metalclad
switchgear
equipment
.
General
Electric
assumes
no
responsibility
for
user
practices
which
deviate
from
these
recommendations
.
Although
the
interlock
linkage
has
been
designed
to
be
rugged
,
inadvertent
bending
of
the
spring
discharge
and
/
or
negative
interlock
actuating
linkages
during
breaker
stor
-
age
,
lift
truck
or
stack
insertion
operations
could
negate
their
proper
functioning
and
therefore
create
a
safety
risk
.
This
type
of
handling
damage
must
be
avoided
by
any
user
.
All
servicing
of
switchgear
must
be
performed
only
by
trained
personnel
,
with
BOTH
THE
PRIMARY
AND
CONTROL
POWER
CIRCUITS
DE
-
ENERGIZED
.
GENERAL
1
.
The
term
“
metalclad
switchgear
”
includes
circuit
breakers
,
associated
interrupting
,
switching
control
,
metering
and
protective
devices
,
together
with
their
supporting
metal
structures
,
enclosures
,
electrical
connections
and
accessories
.
2
.
All
personnel
associated
with
installation
,
operation
and
maintenance
of
metalclad
switchgear
should
be
thoroughly
instructed
and
supervised
regarding
power
equipment
in
general
as
well
as
the
particular
model
of
equipment
with
which
they
are
working
.
Instruction
books
should
be
closely
studied
and
followed
.
These
instructions
do
not
purport
to
cover
al
!
details
or
variations
in
equipment
nor
to
provide
for
every
possible
contingency
to
be
met
in
connection
with
installation
,
operation
or
maintenance
.
Should
further
information
be
desired
or
should
particular
problems
arise
which
are
not
covered
sufficiently
for
the
purchaser
'
s
purposes
,
the
matter
should
be
referred
to
the
General
Electric
Company
.
To
the
extent
required
the
products
described
herein
meet
applicable
A
NS
I
,
IEEE
and
NEMA
stand
-
ards
;
but
no
such
assurance
is
given
with
respect
to
local
codes
and
ordinances
because
they
vary
greatly
.
Registered
Trademark
of
the
General
Electric
Company
5
Courtesy of NationalSwitchgear.com