GE Limitamp CR194 - Controller Operation; Operational Circuit Checks; Test Power Circuit Procedure; Pre-Operation Preparation

CR
194
Vacuum
Limitamp
400
Ampere
Control
Operation
General
A
test
-
power
interlock
(
TPI
)
(
See
Figure
14
)
circuit
and
Test
-
Normal
Selector
Switch
(
TSW
)
(
See
Figure
9
)
is
provided
to
check
out
the
control
circuit
of
the
complete
unit
without
applying
power
to
the
motor
.
After
all
control
-
circuit
connections
are
made
,
the
controller
should
be
put
through
its
complete
operating
sequence
,
in
the
test
position
,
as
a
final
check
.
A
wiring
diagram
which
shows
the
circuit
and
connections
that
apply
to
the
controller
is
included
with
the
controller
when
it
is
shipped
from
the
factory
.
All
external
wiring
from
the
controller
must
be
made
in
accordance
with
the
connection
diagram
supplied
with
the
controller
.
make
a
good
contact
when
closed
.
The
relay
and
contactors
are
carefully
adjusted
at
the
facto
17
;
however
,
should
an
adjustment
of
these
devices
be
necessary
,
these
adjustments
are
explained
in
the
individual
instructions
for
each
device
.
After
all
connections
have
been
properly
made
,
all
parts
properly
assembled
,
and
all
components
thoroughly
inspected
and
adjusted
,
the
controller
is
ready
for
operation
.
Normal
Operation
1
.
After
all
power
and
control
connections
are
made
,
AND
WITH
THE
ISOLATING
DEVICE
OPEN
,
megger
between
phases
at
the
motor
terminals
,
and
between
each
phase
and
ground
stud
or
bus
,
to
ascertain
that
no
short
circuits
are
present
.
2
.
Close
the
compartment
doors
and
apply
power
to
the
controller
.
If
the
operating
handle
of
the
isolating
mechanism
cannot
be
moved
to
the
closed
position
,
it
may
be
that
the
mechanical
interlock
device
is
preventing
this
movement
.
To
move
the
handle
to
the
closed
position
,
the
highwoltage
door
must
be
fully
closed
and
the
contactor
must
be
open
.
Test
Power
Circuit
A
complete
operational
check
of
the
controller
can
be
made
without
applying
voltage
to
the
motor
or
to
the
bus
as
follows
:
1
.
The
isolating
-
device
handle
must
be
in
the
open
position
.
In
the
open
position
,
contacts
of
the
mechani
-
cally
operated
test
-
power
interlock
(
TPI
)
will
open
the
secondary
circuit
of
the
control
-
power
transformer
,
thereby
isolating
it
.
The
Test
-
Normal
Selector
Switch
(
TSW
)
must
be
in
the
“
Test
”
position
to
close
the
circuit
to
the
test
-
power
terminals
on
the
control
terminal
board
.
3
.
Close
the
isolating
-
device
handle
by
moving
the
handle
with
a
rapid
,
positive
motion
to
the
extreme
upper
position
until
it
latches
into
position
.
Unless
the
latch
(
pusher
)
snaps
out
when
the
handle
is
moved
to
2
.
Refer
to
the
elementary
and
connection
diagrams
for
the
extreme
positions
,
either
in
the
open
or
closed
the
required
control
voltage
,
frequency
,
and
test
-
power
terminal
designations
.
Connect
the
required
test
-
power
to
terminals
provided
on
the
terminal
board
in
the
low
-
voltage
control
compartment
.
Power
may
then
be
applied
to
the
low
-
voltage
control
circuit
and
the
circuit
tested
for
proper
operation
.
position
,
the
contact
marked
CPI
(
control
-
power
inter
-
lock
)
will
not
close
and
the
operation
is
not
complete
.
4
.
Operate
the
controller
in
the
normal
manner
with
the
pilot
devices
(
usually
,
push
buttons
)
provided
.
5
.
After
the
preliminary
operation
check
is
made
,
check
the
motor
for
proper
rotation
.
Preparation
of
Controller
for
Operation
Once
the
panel
is
in
place
and
the
cable
terminated
,
clean
the
inside
with
a
brush
,
soft
cloth
,
or
dry
compressed
air
.
Make
certain
that
any
dirt
,
dust
or
bits
of
packing
material
,
which
may
interfere
with
successful
operation
of
the
panel
devices
,
are
removed
from
the
panel
.
Caution
:
Care
should
be
taken
during
the
cleaning
operation
to
prevent
any
dirt
from
being
bloion
into
the
inaccessible
spaces
of
the
devices
.
Before
the
controller
can
be
operated
,
even
for
a
tryout
without
power
,
all
devices
must
be
placed
in
full
operating
condition
.
Also
,
check
to
ascertain
that
no
tools
or
loose
wires
have
been
left
within
the
panel
during
installation
.
Operate
each
device
by
hand
to
see
that
the
moving
parts
operate
freely
and
without
binding
.
Make
sure
that
all
electrical
contact
tips
are
clean
,
free
of
grease
and
dirt
,
and
Door
Opening
Procedure
General
To
open
the
high
-
voltage
doors
to
gain
access
to
the
contactor
or
motor
terminals
,
the
contactor
must
be
in
the
de
-
energized
position
.
If
the
contactor
is
energized
,
the
latch
on
the
disconnect
handle
cannot
be
pushed
in
,
the
handle
cannot
be
operated
,
nor
can
the
door
be
opened
.
Depressing
the
stop
button
de
-
energizes
the
contactor
.
The
latch
release
on
the
disconnect
handle
can
then
be
depressed
,
which
opens
an
electrical
interlock
in
the
secondary
of
the
control
-
power
transformer
.
When
the
latch
release
has
been
depressed
,
the
isolating
switch
handle
may
be
moved
to
the
lower
or
open
position
.
With
the
disconnect
handle
in
the
lower
position
,
the
high
-
voltage
door
may
be
opened
by
turning
the
V
\
turn
latches
.
27
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