GE POWER/VAC 4.16 - Description of Switchgear Components; Secondary Enclosure Details; Primary Enclosure Details; Breaker Removable Element

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ON
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Li
-
Remote
Racking
Operator
Fig
.
11
DESCRIPTION
Each
unit
is
made
up
of
a
secondary
enclosure
and
a
primary
enclosure
as
shown
in
Fig
.
9
.
BREAKER
REMOVABLE
ELEMENT
SECONDARY
ENCLOSURE
The
removable
element
consists
of
a
Power
/
Vac
*
circuit
breaker
which
includes
an
operating
mechanism
,
interlocks
,
primary
and
secondary
disconnecting
devices
.
The
Power
/
Vac
*
breakers
are
equipped
with
wheels
for
easy
movement
along
the
floor
.
A
lift
truck
(
Fig
.
10
)
is
provided
for
insertion
and
removal
of
the
circuit
breaker
from
the
metal
-
clad
unit
.
The
secondary
enclosure
is
located
at
the
front
of
the
unit
where
the
breaker
is
withdrawn
.
This
enclosure
consists
of
a
compartment
with
a
hinged
panel
upon
which
are
mounted
the
necessary
instruments
,
control
and
protective
devices
.
The
terminal
blocks
,
fuse
blocks
,
and
some
control
devices
are
mounted
inside
the
enclosure
on
the
side
sheets
and
on
the
internal
device
panel
.
A
wiring
space
is
provided
across
the
top
of
the
unit
to
run
wires
between
vertical
sections
.
Power
/
Vac
*
circuit
breakers
of
the
same
rating
are
inter
-
changeable
in
their
corresponding
metal
-
clad
units
.
An
interference
interlock
is
provided
on
the
rear
of
each
circuit
breaker
to
insure
that
the
properly
rated
breaker
is
used
within
the
proper
metal
-
clad
unit
.
(
See
OPERATION
—
INTERFERENCE
INTERLOCK
,
FIGURE
44
.
PRIMARY
ENCLOSURE
The
primary
enclosure
contains
the
high
voltage
equip
-
ment
and
connections
.
It
consists
of
the
breaker
compart
-
ments
,
the
bus
compartment
,
the
cable
termination
com
-
partment
,
and
auxiliary
compartments
for
voltage
and
control
power
transformers
.
Each
of
these
compartments
is
separated
from
the
others
by
metal
barriers
for
reliability
and
safety
.
Interference
Interlocks
(
Fig
.
44
)
are
provided
on
the
metal
-
clad
unit
to
permit
only
the
circuit
breaker
with
the
correct
voltage
,
continuous
current
,
MV
A
and
momentary
rating
to
be
inserted
.
For
a
detailed
description
of
the
Power
/
Vac
*
breaker
and
its
operation
,
the
breaker
instruction
book
GEK
39671
should
be
consulted
.
BREAKER
LIFT
TRUCK
For
ease
of
breaker
handling
during
installation
and
removal
,
a
breaker
lift
truck
is
furnished
as
a
standard
17
Courtesy of NationalSwitchgear.com