GE GEI-44233 F User manual

INSTRUCTIONS
GEI
-
44233
F
Supersedes
GEI
-
44233
E
TIME
-
OVERCURRENT
RELAYS
TYPE
IAC
66
K
GENERAL
W
ELECTRIC
Courtesy of NationalSwitchgear.com

GEI
-
44233
CONTENTS
PAGE
DESCRIPTION
APPLICATION
RATINGS
CHARACTERISTICS
BURDENS
CONSTRUCTION
RECEIVING
,
HANDLING
AND
STORAGE
ACCEPTANCE
TESTS
VISUAL
INSPECTION
MECHANICAL
INSPECTION
DRAWOUT
RELAYS
GENERAL
POWER
REQUIREMENTS
GENERAL
TIME
-
OVERCURRENT
UNIT
STANDARD
INSTANTANEOUS
UNIT
HIGH
DROPOUT
INSTANTANEOUS
UNIT
.
.
..
TARGET
AND
SEAL
-
IN
UNIT
INSTALLATION
LOCATION
MOUNTING
CONNECTIONS
INSPECTION
PERIODIC
CHECKS
AND
ROUTINE
MAINTENANCE
TIME
-
OVERCURRENT
UNIT
INSTANTANEOUS
UNIT
HIGH
DROPOUT
INSTANTANEOUS
UNIT
.
.
..
TARGET
AND
SEAL
-
IN
UNIT
CONTACT
CLEANING
SYSTEM
TEST
.
.
SERVICING
AND
ADJUSTMENTS
TIME
-
OVERCURRENT
UNIT
PICKUP
TESTS
TIME
SETTING
STANDARD
INSTANTANEOUS
UNIT
HIGH
-
DROPOUT
INSTANTANEOUS
UNIT
TARGET
AND
SEAL
-
IN
UNIT
RENEWAL
PARTS
3
3
4
4
4
5
5
6
6
6
6
6
7
7
7
7
7
7
7
7
8
8
8
8
8
8
8
8
8
8
9
9
9
9
9
10
Please
check
your
previous
revision
to
This
instruction
book
has
had
a
major
revision
,
compare
material
.
2
Courtesy of NationalSwitchgear.com

GEI
-
44233
TIME
OVERCURRENT
RELAYS
TYPE
IAC
66
K
DESCRIPTION
The
type
IAC
66
K
relay
is
similar
to
the
IAC
51
B
except
:
(
1
)
the
U
-
magnet
construction has been altered
to
give
a
very
long
time
operating
characteristic
,
Fig
.
1
;
(
2
)
the
tap
ranges
are
shown
in
Table
I
,
and
(
3
)
the
relay
has
two
instantaneous
units
,
one
standard unit
,
and
one
special
high
dropout
unit
.
The
standard
is
mounted
in
the
front of
the
relay
while the
special
unit is
mounted
in
the
rear
.
The
internal
connections
are
shown
in
Fig
.
3
and
the
outline and
panel
drilling
in
Fig
.
7
.
APPLICATION
The
Type
IAC
66
K
relay
is
used
for
motor
protection
.
Typical
external
connections
for
motor
protection
are
shown
in
Fig
.
4
.
The recommended
settings
for
the three units
are
as
follows
:
P
.
U
.
SETTING
MULTIPLES
OF
FULL
LOAD
CUR
.
UNIT
TIME
OVERCURRENT
UNIT
NORMAL
DROPOUT
INST
.
OVERCURRENT
UNIT
HIGH
DROPOUT
INST
.
OVERCURRENT
UNIT
51 1.15
to
1.4
8
to
15
50
/
I
0
C
-
A
2
to
3
50
/
I
0
C
-
B
Based
on
these
settings
,
the
ratings
of
the
three units
should
be
chosen
as
follows
:
RECOMMENDED
RATINGS
MOTOR
FULL
LOAD
CURRENT
50
/
I
0
C
-
A
50
/
I
0
C
-
B
51
UNIT
UNIT
UNIT
10
-
40
10
-
40
20
-
80
20
-
80
20
-
80
2
-
6
4
-
12
4
-
12
1
-
2
1.5
-
3
2.5
-
5
2
-
6
4
-
8
0.8
-
1.7
1.4
-
2.6
1.8
-
4.3
1.8
-
4.3
2.9
-
5.0
12
4
4
-
12
When
adjusted
as
shown
above
,
the
relay
operates
as
follows
:
For
overloads
,
the
51
unit
times
out
,
picking
up
external
auxiliary
51
X
,
which
rings
the alarm
bell
.
1
.
For
locked
rotor
,
the
50
/
I
0
C
-
B
unit
will
pick
up
instantaneously
and the
51
unit
will
pick
up
with
time
delay
.
When
both units have
operated
,
the
breaker is
tripped
to
cause
shut down
of
the
motor
.
For
a
fault
,
the
50
/
I
0
C
-
A
unit
will
pick
up
instantaneously
to
trip
the
breaker and
cause
shut
down
of
the
motor
.
2
.
3
.
These
instructions
do
not
purport
to
cover
all
details
or
variations
in
equipment
nor
to
provide
for
every
possible
contingency
to
be
met
in
connection
with
installation
,
operation
or
maintenance
,
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
.
Should
To
the
extent
required
the
products
described herein
meet
applicable
ANSI
,
IEEE
and
NEMA
standards
;
but
no
such
assurance
is
given
with
respect
to
local codes
and
ordinances
because
they
vary
greatly
.
3
Courtesy of NationalSwitchgear.com

GEI
-
44233
RATINGS
The
induction
unit
ranges
and
taps
available
are
given
in
Table
I
.
TABLE
I
TAP
TAP
TAP
TAP
TAP TAP
TAP
COIL
-
AMPS
A
B
C
D
E
F
G
1.6
1
-
2
1.0
1.1
1.2
1
.
4
1.8
2.0
2.4
1.5
-
3
2.5
-
5
1.5
1.7
1.9
2.1
2.7
3.0
4.0
2.5
2.8
3.1
3.5
4.5
5.0
2
-
6
2.0
2.5
3.0
3.5
4.0
5.0
6.0
4
-
8
4.0
4.5
5.0
5.6
6.3
7.1
8.0
The
current
-
closing
rating
of
the
contacts
is
30
amperes
for
voltages
not
exceeding
250
volts
.
The
current
-
carrying
ratings
are
affected
by
the
selection
of
the
tap
on
the
target
and
seal
-
in
coil
as
indicated
in
Table
II
.
TABLE
II
Amperes
,
AC
or
DC
FUNCTION
2
-
Amp
Tap
0.2
Amp
Tap
Operating
Range
Tripping
Duty
Carry
Continuously
Resistance
Impedance
@
60
cycles
2
-
30
0.2
-
2
30
5
3
0.3
0.13
7
0.53
52
If
the
tripping
current
exceeds
30
amperes
,
an
auxiliary
relay
should
be
used
,
the
connections
being
such
that
the
tripping
current
does
not
pass
through
the
contacts
or
the
target
and
seal
-
in
coils
of
the
protective
relay
.
The
standard
instantaneous
unit
ranges
available
are
4
-
16
,
10
-
40
,
20
-
80
and
40
-
160
amperes
.
The
high
dropout
instantaneous
unit
ranges
available
are
2
-
6
,
4
-
12
,
10
-
30
and
20
-
60
amperes
.
CHARACTERISTICS
The
time
-
current
characteristics
for
the
Type
IAC
66
K
relay
induction
unit
are
shown
in
Fig
.
1
.
Fig
.
2
shows
the
time
-
current
characteristics
of
the
standard
instantaneous
unit
.
The
special
high
dropout
instantaneous
unit
is
designed
to
yield
dropout
values
of
80
percent
,
or
higher
,
of
pickup
current
.
BURDENS
Burden
data
for
the
coils
of
the
induction
unit
are
given
in
Table
III
.
The
data
are
calculated
for
five
amperes
from
measurement
at
minimum
pickup
current
or
at
five
amperes
when
minimum
pickup
exceeds
five
amperes
.
TABLE
III
COIL
-
WPS
FREQ
.
VOLT
AMPS
WATTS
P
.
F
.
1
SEC
.
RATING
1
-
2
60
118.4
15.2
0.13
145
AMP
50
98.5
12.7
0.13
145
1.5
-
3
60
52.5
6.7
250
0.13
50
43.7
5.6
0.13
250
2.5
-
5
60
18.8
2.5
0.13
300
50
15.7
2.1
0.13
300
2
-
6
60
29.5
3.9
0.13
300
4
-
8
60
7.4
0.95
0.13
400
50
6.2
0.79
0.13
400
*
Ir
.
icates
revision
4
Courtesy of NationalSwitchgear.com

GEI
-
44233
Burden data
for
the
standard instantaneous unit
coils
are
given
in
Table
IV
.
TABLE
IV
1
SEC
.
RATING
COIL
-
AMPS
WATTS
P
.
F
.
FREQ
.
VOLT
-
AMPS
145
AMP
4
-
16 60
5.0 4.75 0.95
5.0 4.75
0.95
145
50
0.79
290
0.95
10
-
40
0.83
60
0.76
0.95 290
0.80
50
450
0.20
0.95
0.21
20
-
80
60
0.20
450
50
0.19
0.95
0.052
40
-
160 60
0.049
0.048
450
0.95
50
0.05
450
0.95
Burden data
for
the
high
dropout
instantaneous
unit
are
given
in
Table
V
.
TABLE
V
*
VOLT
-
AMPS
WATTS
FREQ
.
P
.
F
.
1
SEC
.
RATING
COIL
-
AMPS
2
-
6
0.70
75
60
20.0 14.0
0.70
75
50
16.5 11.5
4
-
1 2
0.70
145
60
5.0
3.5
145
0.70
50
4.1
2.9
0.80 0.56 0.70 270
10
-
30
60
0.47 0.70 270
50
0.67
0.20
20
-
60
60
0.14
0.70
450
50
0.17
0.12
0.70
450
CONSTRUCTION
The
induction
unit
is
the basic
unit
in
all
IAC
relays
.
These
units
are
of
the
induction
-
disk
con
-
struction
type
.
The
disk is actuated
by
a
current
operating
coil
on
a
laminated
U
-
magnet
.
The
disk
shaft
carries
the
moving
contact
which
completes
the
alarm
or
trip
circuit
when
it
touches
the
stationary
contact
.
The
disk
shaft
is restrained
by
a
spiral
spring
to
give
the
proper
contact
-
closing
current
and its
motion
is
retarded
by
a
permanent
magnet
acting
on
the disk
to
give
the
correct
time
delay
.
There
is
a
seal
-
in
unit mounted
on
the
front
to
the left
of
the
shaft
.
This
unit
has its
coil
in
series
and
its
contacts
in
parallel
with the
main
contacts
such
that
when the
main
contacts
close
the
seal
-
in
unit
picks
up
and
seals
in
.
When
the
seal
-
in
unit
picks
up
,
it
raises
a
target
into view
which
latches
up
and
remains
exposed
until released
by pressing
a
button
beneath
the lower left
corner
of
the
cover
.
The
standard
instantaneous
unit is
a
small instantaneous
hinge
-
type
unit
mounted
on
the
right
front
side
of
the
induction
unit
.
Its
contacts
are
normally
connected
in
parallel
with
the
contacts
of
the
main
unit
.
Its
coil
is
connected
in
series with the
operating
coil
of
the
main
unit
.
When
the
current
reaches
a
predetermined
value
,
the
instantaneous
unit
operates
,
closing
the
contact
and
raising
its
target
into
view
.
The
target
latches
in
the
exposed
position
until
released
by
pressing
the
button
beneath
the
lower left
-
hand
corner
of
the
relay
cover
.
The
special
high
dropout
instantaneous
unit is
constructed without
a
target
,
and
is
designed
to
drop
-
out
at
80
percent
of
pickup
,
or
higher
.
The
pole piece
is
constructed and secured
with
a
special
wave
washer
so
that
it
can
be
rotated
to
the
most
favorable
position
.
The
armature
has
been
shortened
for
the
same
purpose
.
This unit
is
mounted
in
the
rear
of
the
relay
.
Its
coil
is
connected
in
series
with
the
operating
coil
of
the
main
unit
but
its
contact
is
electrically
separate
.
RECEIVING
,
HANDLING
AND
STORAGE
These
relays
,
when
not
included
as
a
part
of
a
control
panel
,
will
be
shipped
in
cartons
designed
to
protect
them
against
damage
.
Immediately
upon
receipt
of
the
relay
,
an
examination
should
be
made
for
any
damage
sustained
during
shipment
.
If
injury
or
damage
resulting
from
rough
handling
is
evident
,
a
claim
should
be
filed
at
once
with the
transportation
company
and
the
nearest
Sales
Office
of
the
General
Electric
Company
notified
promptly
.
*
Indicates
revision
5
Courtesy of NationalSwitchgear.com

GEK
-
44233
Reasonable
care
should
be
exercised
in
unpacking
the
relay
in
order
that
none
of
the
parts
are
injured
or
the
adjustments
disturbed
.
If
the
relays
are
not
to
be
installed
immediately
,
they
should
be
stored
in
their
original
cartons
in
a
place
that
is
free
from
moisture
,
dust
,
and
metallic
chips
.
Foreign
matter
collected
on
the
outside
of
the
case
may
find
its
way
inside
when
the
cover
is
removed
and
cause
trouble
in
operation
of
the
relay
.
ACCEPTANCE
TESTS
Immediately
upon
receipt
of
the
relay
an
INSPECTION
AND
ACCEPTANCE
TEST
should
be
made
to
ensure
that
no
damage
has
been
sustained
in
shipment
and
that
the
relay
calibrations
have
not
been
disturbed
.
If
the
examination
or
test
indicates
that
readjustment
is
necessary
,
refer
to
the
section
on
SERVICING
.
These
tests
may
be
performed
as
part
of
the
installation
or
acceptance
tests
at
the
discretion
of
the
user
.
VISUAL
INSPECTION
Check
the
nameplate
stamping
to
ensure
that
the
model
number
and
rating
of
the
relay
agree
with
the
requisition
.
Remove
the
relay
from
its
case
and
check
that
there
are
no
broken
or
cracked
molded
parts
or
other
signs
of
physical
damage
,
and
that
all
screws
are
tight
.
MECHANICAL
INSPECTION
1
.
There
should
be
no
noticable
friction
when
the
disk
is
rotated
slowly
clockwise
,
return
by
itself
to
its
rest
position
.
Make
sure
the
control
spring
is
not
deformed
nor
its
convolutions
tangled
or
touching
.
The
armature
and
contacts
of
the
seal
-
in
unit
as
well
as
the
armature
and
contacts
of
the
instan
-
taneous
units
should
move
freely
when
operated
by
hand
;
there
should
be
at
least
1
/
32
inch
wipe
on
the
seal
-
in
unit
and
both
instantaneous
unit
contacts
.
The
targets
in
the
seal
-
in
unit
and
in
the
standard
instantaneous
unit
must
come
into
view
and
latch
when
the
armatures
are
operated
by
hand
and
should
unlatch
when
the
target
release
lever
is
operated
.
Make
sure
that
the
fingers
and
shorting
bars
agree
with
the
internal
connections
diagram
.
The
disk
should
2
.
3
.
4
.
5
.
CAUTION
CIRCUITS
AND
OTHER
CIRCUITS
WITH
SHORTING
BARS
THAT
THE
AUXILIARY
BRUSH
BE
BENT
HIGH
ENOUGH
TO
ENGAGE
THE
CONNECTING
PLUG
OR
TEST
PLUG
BEFORE
THE
MAIN
BRUSHES
DO
.
THIS
WILL
PREVENT
CT
SECONDARY
CIRCUITS
FROM
BEING
OPENED
.
SEE
FIG
.
6
.
EVERY
CIRCUIT
IN
THE
DRAWOUT
CASE
HAS
AN
AUXILIARY
BRUSH
.
IT
IS
ESPECIALLY
IMPORTANT
ON
CURRENT
DRAWOUT
RELAYS
GENERAL
Since
all
drawout
relays
in
service
operate
in
their
cases
,
it
is
recommended
that
they
be
tested
in
their
cases
or
an
equivalent
steel
case
.
In
this
way
,
any
magnetic
effects
of
the
enclosure
will
be
accurately
duplicated
during
testing
.
A
relay
may
be
tested
without
removing
it
from
the
panel
by
using
a
12
XLA
13
A
test
plug
.
This
plug
makes
connections
only
with
the
relay
and
does
not
disturb
any
shorting
bars
in
the
case
.
The
12
XLA
12
A
test
plug
may
also
be
used
.
Although
this
test
plug
allows
greater
testing
flexibility
,
it
requires
CT
shorting
jumpers
and
the
exercise
of
greater
care
,
since
connections
are
made
to
both
the
relay
and
the
external
circuitry
.
POWER
REQUIREMENTS
GENERAL
All
alternating
-
current
operated
devices
are
affected
by
frequency
.
Since
non
-
sinusoidal
waveforms
can
be
analyzed
as
a
fundamental
frequency
plus
harmonics
of
the
fundamental
frequency
,
it
follows
that
alternating
-
current
devices
(
relays
)
will
be
affected
by
the
applied
waveform
.
Therefore
,
in
order
to
properly
test
alternating
-
current
relays
it
is
essential
to
use
a
sine
wave
of
current
and
/
or
voltage
.
The
purity
of
the
sine
wave
(
i
.
e
.
its
freedom
from
harmonics
)
cannot
be
expressed
as
a
finite
number
for
any
particular
relay
,
however
,
any
relay
using
tuned
circuits
,
R
-
L
or
RC
networks
,
or
saturating
electromagnets
(
such
as
time
-
overcurrent
relays
)
would
be
essentially
affected
by
non
-
sinusoidal
wave
forms
.
6
Courtesy of NationalSwitchgear.com

GEI
-
44233
TIME
-
OVERCURRENT
UNIT
With
the
tap
plug
in
the minimum
position
and the time dial
set
in
the No
.
1
/
2
position
,
check
the
current
required
to
just
close
the
contact
.
It
should
be
within
+
5
percent
of
the
minimum
pickup
shown
on
the
tap
block
.
The
operating
time
from
the Number
5
time
-
dial
setting
at
five
times
minimum
pickup
setting
should
be
within
seven
percent
of
the
value shown
in
Fig
.
1
.
With
the time
dial
at
No
.
10
time
setting
and the
tap
plug
in
the
lowest
tap
,
apply
sufficient
current
in
the
relay
to
definitely
close the
contacts
.
Reduce the
current
to
75
percent
of
tap
value and
the
disk
should
reset
all
the
way
to
the
No
.
10
dial
-
setting
position
.
STANDARD
INSTANTANEOUS
UNIT
With
the
target
in
the down
position
,
check
the
pickup
at
the minimum
calibration
mark
using
rated
fre
-
quency
.
The
pickup
current
should
be
within
_
+
15
percent
of
the minimum
rating
on
the
nameplate
.
HIGH
DROPOUT
INSTANTANEOUS
UNIT
With
rated
frequency
applied
,
Set
the
unit
for
the
minimum calibration shown
by
the
nameplate
rating
,
the
pickup
current
should
be
within
+
15
percent
of
the
minimum
rating
on
the
nameplate
.
Dropout
current
should
be
at
least
80
percent
of
the
minimum
rating
on
the
nameplate
.
TARGET
AND
SEAL
-
IN
UNIT
PICKUP
AND
DROPOUT
TEST
Connect
relay
studs
1
and
2
(
see
internal connections
diagram
)
to
a
DC
source
,
ammeter
and
load
box
so
that
the
current
can
be
controlled
over
a
range
of
0.1
to
2.0
amperes
.
Turn
the
time
dial
to
the
ZERO
TIME
-
DIAL
position
.
Increase
the
current
slowly
until the
seal
-
in
unit
picks
up
.
Move
the
time dial
away
from
the
ZERO
TIME
-
DIAL
position
;
the seal
-
in
unit
should remain
in
the
picked
up
position
.
Decrease
the
current
slowly
until
the
seal
-
in
unit
drops
out
.
1
.
2
.
See
Table
VI
.
3
.
4
.
See
Table
VI
.
5
.
TABLE VI
PICKUP
CURRENT
PICKUP
CURRENT
TAP
0.05
OR
MORE
0.15
-
0.195
0.2
2.0
1.50
-
1.95
0.55
OR
MORE
INSTALLATION
LOCATION
The
location
should
be
clean
and
dry
,
free
from
dust
and
excessive
vibration
,
and
well
lighted
to
facilitate
inspection
and
testing
.
MOUNTING
The
outline
and
panel
diagram
is
shown
in
Fig
.
7
.
The
relay
should
be mounted
on
a
vertical
surface
.
CONNECTIONS
A
typical
external
wiring
diagram
is
shown
in
The
internal
connection
diagram
is shown
in
Fig
.
3
.
Fig
.
4
.
One
of
the
mounting
studs
or
screws
should
be
permanently
grounded
by
a
conductor
not
less
than No
.
12
B
&
S
gage
copper
wire
or
its
equivalent
.
7
Courtesy of NationalSwitchgear.com

GEI
-
44233
INSPECTION
At
the
time
of
installation
,
the
relay
should
be
inspected
for
tarnished
contacts
,
loose
screws
,
or
other
imperfections
.
If
any
trouble
is
found
,
it
should
be
corrected
in
the
manner
described
under
MAINTENANCE
.
CAUTION
:
EVERY
CIRCUIT
IN
THE
DRAWOUT
CASE
HAS
AN
AUXILIARY
BRUSH
.
IT
IS
ESPECIALLY
IMPORTANT
ON
CURRENT
CIRCUITS
AND
OTHER
CIRCUITS
WITH
SHORTING
BARS
THAT
THE
AUXILIARY
BRUSH
BE
BENT
HIGH
ENOUGH
TO
ENGAGE
THE
CONNECTING
PLUG
OR
TEST
PLUG
BEFORE
THE
MAIN
BRUSHES
DO
.
THIS
WILL
PREVENT
CT
SECONDARY
CIRCUITS
FROM
BEING
OPENED
.
PERIODIC
CHECKS
AND
ROUTINE
MAINTENANCE
In
view
of
the
vital
role
of
protective
relays
in
the
operation
of
a
power
system
,
it
is
important
that
a
periodic
test
program
be
followed
.
It
is
recognized
that
the
interval
between
periodic
checks
will
vary
depending
upon
environment
,
type
of
relay
and
the
user
’
s
experience
with
periodic
testing
.
Until
the
user
has
accumulated
enough
experience
to
select
the
test
interval
best
suited
to
his
individual
require
-
ments
,
it
is
suggested
that
the
points
listed
below
be
checked
at
an
interval
of
once
a
year
.
*
These
tests
are
intended
to
ensure
that
the
relays
have
not
deviated
from
their
original
settings
.
If
deviations
are
encountered
,
the
relay
must
be
retested
and
serviced
as
described
in
this
manual
.
TIME
-
OVERCURRENT
UNIT
Perform
the
tests
described
in
the
ACCEPTANCE
TEST
section
,
instead
of
the
lowest
tap
;
this
will
not
change
the
test
limits
.
The
tap
that
is
in
service
may
be
used
INSTANTANEOUS
UNIT
Check
that
the
instantaneous
unit
picks
up
at
the
desired
current
level
,
as
outlined
in
the
ACCEPTANCE
TEST
section
.
If
the
unit
is
not
set
at
the
minimum
calibration
mark
,
pickup
should
be
within
+
15
percent
of
the
mark
for
which
it
is
set
.
HIGH
DROPOUT
INSTANTANEOUS
UNIT
Check
pickup
and
dropout
current
to
the
limits
outlined
in
the
ACCEPTANCE
TEST
section
.
TARGET
AND
SEAL
-
IN
UNIT
Check
pickup
and
dropout
as
outlined
in
the
ACCEPTANCE
TEST
section
.
CONTACT
CLEANING
For
cleaning
relay
contacts
,
a
flexible
burnishing
tool
should
be
used
.
This
consists
of
a
flexible
strip
of
metal
with
an
etched
-
roughened
surface
resembling
in
effect
a
superfine
file
.
The
polishing
action
is
so
delicate
that
no
scratches
are
left
,
yet
it
will
clean
off
any
corrosion
thoroughly
and
rapidly
.
Its
flexibility
ensures
the
cleaning
of
the
actual
points
of
contact
.
Do
not
use
knives
,
files
,
abrasive
paper
or
cloth
of
any
kind
to
clean
relay
contacts
.
SYSTEM
TEST
Although
this
instruction
book
is
primarily
written
to
check
and
set
the
IAC
relay
,
overall
functional
tests
to
check
the
system
operation
are
recommended
at
intervals
based
on
the
customer
'
s
experience
.
SERVICING
AND
ADJUSTMENTS
TIME
-
OVERCURRENT
UNIT
If
it
is
found
during installation
or
periodic
testing
that
the
time
-
overcurrent
unit
is
out
of
limits
,
the
unit
may
be
recalibrated
as
follows
:
Rotate
time
dial
to
No
.
0
time
-
dial
setting
and
check
by
means
of
a
lamp
that
the
contacts
just
close
.
Where
the
contacts
just
close
can
be
adjusted
by
running
the
stationary
contact
brush
in
or
out
by
means
of
its
adjusting
screw
.
This
screw
should
be
held
securely
in
its
support
.
With
the
contacts
just
closing
at
No
.
0
time
setting
,
there
should
be
sufficient
gap
between
the
stationary
contact
brush
and
its
metal
backing
strip
to
ensure
approximately
1
/
32
inch
wipe
.
8
*
Indicates
revision
Courtesy of NationalSwitchgear.com

GEI
-
44233
Pickup
Tests
The
current
at
which the
contacts
operate
1
s
determined
by
the
position
of
the
tap
plug
in
the
tap
block
at
the
top
of
the
relay
.
Screw
the
tap
plug
firmly
into
the
tap
marked
for
the desired
current
(
below
which the
unit is
not
to
operate
)
.
When
changing
the
current
setting
of
the unit
,
remove
the
connecting
plug
to
short
circuit
the
current
transformer
secondary
circuit
.
Next
,
screw
the
tap
plug
into
the
tap
marked
for
the
desired
current
and
then
replace
the
connecting
plug
.
The
pickup
of
the
unit
for
any
current
tap
is
adjusted
by
means
of
a
spring
-
adjusting
ring
.
The
ring
may
be
turned
by
inserting
a
screw
driver
in
the
notches
around
the
edge
.
By
turning
the
ring
,
the
operating
current
of
the unit
may
be
brought
into
agreement
with the
tap
setting employed
,
if
for
some reason
,
this
adjustment
has
been
disturbed
.
This
adjustment
also
permits
any
desired
setting
Intermediate between
the
various
tap
settings
to
be obtained
.
Time
Setting
The
setting
of
the time
dial
determines
the
length
of
time the
unit
requires
to
close its
contacts
when
the
current
reaches
a
predetermined
value
.
The
contacts
are
just
closed
when
the dial
is
set
on
zero
.
When
the
dial
is
set
on
10
,
the
disk
must
travel
the
maximum
amount
to
close
the
contacts
and
therefore this
setting gives
the
maximum time
setting
.
The
primary
adjustment
for
the time
of
operation
of
the unit is made
by
means
of
the
time
dial
.
However
,
further
adjustment
is
obtained
by moving
the
permanent
magnet
along
its
supporting
shelf
;
moving
the
magnet
toward
the
disk shaft decreases
the
time
,
while
moving
it
away
increases
the
time
.
STANDARD
INSTANTANEOUS
UNIT
Select
the
current
above
which
is
desired
to
have
the
instantaneous
unit
operate
and
set
the
adjustable
pole piece
so
that
the
top
of
the
hexagon
head
is
even
with the
desired
calibration
op
.
Jthe
scale
.
To
raise
or
lower
the
pole
piece
,
loosen
the
locknut
and
turn
it
up
or
down
and then
tighten
in
position
.
The
contacts
should
be
adjusted
to
make
at
about
the
same
time and
to
have
approximately
1
/
32
inch
wipe
.
This
adjustment
can
be
made
by
loosening
the
screws
holding
the
stationary
contacts
and
moving
the
contacts
up
or
down
as
required
.
HIGH
-
DROPOUT
INSTANTANEOUS
UNIT
The
high
-
dropout
,
instantaneous
unit is
similar
to
the
standard
,
instantaneous
unit
except
it
has
no
target
and
dropout
current
is
approximately
80
percent
of
the
pickup
current
.
Fig
.
5
is
a
picture
of
the
high
dropout
unit
.
The
adjustable
core
(
A
)
sets
the
pickup
level
.
Turning
the
core
down
(
clockwise
,
top
view
)
lowers
the
pickup
,
while
turning
the
core
up
(
counterclockwise
,
top
view
)
increases
the
pickup
.
Before
attempting
to
turn
the
core
,
the locknut
(
B
)
must
be
loosened
.
After
adjusting
the
core
,
the locknut
must
be
retightened
.
When
loosening
or
tightening
the locknut
,
the
sleeve
(
C
)
to
which
the
shading
ring
(
D
)
is
attached
must
be
held
to
prevent
it
from
turning
.
Rotation
of
the
shading ring
sets
the
dropout
level and
thereby
determines
the
quietness
of
operation
in
the
picked
up
position
.
The
core
has
been
factory
set
to
obtain
80
percent
dropout
at
the
minimum
setting
.
Should
it
be
necessary
to
change
the
dropout
setting
,
the
sleeve
(
C
)
to
which
the
shading
ring
(
D
)
is
attached
must
always
be
turned
in
the
clockwise
direction
(
top
view
)
.
This
will
prevent
the
sleeve
and
shading
ring
assembly
from
being
loosened
.
The unit
will
pickup
at
the
scale
-
plate
marking
plus
or
minus
15
percent
with
gradually
applied
current
.
The
mean
air
gap
should
be
approximately
1
/
16
inch
,
the
contact
gap
approximately
3
/
32
inch
,
and the
contact
wipe
approximately
1
/
32
inch
.
TARGET
AND
SEAL
-
IN
UNIT
For
trip
coils
operating
on
currents
ranging
from
0.2
up
to
2.0
amperes
at
the
minimum
control
voltage
,
set
the
target
and
seal
-
in
tap
screw
in
the
0.2
-
ampere
tap
.
For
trip
coils
operating
on
currents
ranging
from
2
to
30
amperes
at
the minimum
control
voltage
,
place
the
tap
plug
in
the
2
-
ampere
tap
.
9
Courtesy of NationalSwitchgear.com

GE
1
-
44233
The
tap
screw
is the
screw
holding
the
right
-
hand
stationary
contact
of
the seal
-
in
unit
.
To
change
the
tap
setting
,
first
remove
the
connecting
plug
.
Then
,
take
a
screw
from
the left
-
hand
stationary
contact
and
place
it
in
the
desired
tap
.
Next
,
remove
the
screw
from
the other
tap
,
and
place
it
in
the
left
-
hand
contact
.
This
procedure
is
necessary
to
prevent
the
right
-
hand
stationary
contact
from
getting
out
of
adjust
-
ment
.
Screws
should
not
be
in
both
taps
at
the
same
time
.
RENEWAL PARTS
It
is recommended
that
sufficient
quantities
of
renewal
parts
be carried
in
stock
to
enable
the
prompt
replacement
of
any
that
are
worn
,
broken
,
or
damaged
.
When
ordering
renewal
parts
,
address
the
nearest
Sales
Office
of
the
General
Electric
Company
,
specify
quantity
required
,
name
of
the
part
wanted
,
and the
complete
model
number
of
the
relay
for
which
the
part
is
required
.
10
Courtesy of NationalSwitchgear.com

GEI
-
44233
s
3
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5
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13
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CM
n
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*
«
MULTIPLES
OF
RELAY
TAP
SETTING
FIG
.
1
(
0888
B
0273
-
0
)
Time
-
current
Characteristics
of
Type
IAC
66
K
Relay
11
Courtesy of NationalSwitchgear.com

GEI
-
44233
WT
I
I
a
.
K
>
9
5
8
5
4
3
1.5
2
•
k
FIG
.
2
(
0208
A
8695
-
1
)
Time
-
current
Characteristic
of Standard
Hi
-
Seismic
Instantaneous
Unit
12
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GEI
-
44233
INSTANTANEOUS
I
NDUCTI
ON
STANDARO
HI
-
DROPOUT
\
i
/
SI
<
r
S
'
I
V
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V
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*
si
,
*
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pfc
\
pk
\
/
V
.
\
t
V
V
V
V
V
o
9
3
5
1
10
6
2
*
-
SHORT
FINGER
FIG
.
3
(
402
A
903
-
1
)
Internal
Connections
Diagram
for
Type
IAC
66
K
Relay
(
Front
View
)
.
13
Courtesy of NationalSwitchgear.com

GEI
-
44233
MOTOR
52
51
-
1
5
Q
-
I
50
-
1
TOC
IOC
-
A
IOC
-
B
\
$
51
-
3
50
-
1
50
-
1
TOC
IOC
-
A
IOC
-
B
5
^
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Vfi
j
-
50
-
l
*
1
3
TIOC
-
A
3
T
IOC
-
A
1
1
50
-
3
3
=
2
51
-
1
SI
Si
±
3
*
I
1
1
1
51
-
3
3
=
2
51
-
1
51
-
1
III
J
"
SI
2
T
TOC
TOC
97
50
-
1
50
-
3
IOC
-
B
10
y
IOC
-
B
o
1
ALARM
10
f
if
-
ja
*
L
TC
t
USE
WHENNECESSARY
FOR
CONTACT
ARC
SUPPRESS
t
ON
51
TIME
OVERCURRENT
RELAY
51
X
AUXILIARY
RELAY
NORMAL
DROPOUT
INSTANTANEOUS
OVERCURRENT
UNIT
POWER
CIRCUIT
BREAKER
50
/
IOC
-
A
52
50
/
IOC
-
B
HIGH
DROPOUT INSTANTANEOUS OVERCURRENT
UNIT
52
/
a
AUXILIARY
CONTACT
CLOSED
WHEN
CIRCUIT
BREAKER
IS
CLOSED
TC
TRIP
COIL
FIG
.
4
(
104
A
8568
-
3
)
Typical
External
Connections
for
Motor
Protection
Using Type
IAC
66
K
Relays
14
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GEI
-
44233
i
ADJUSTABLE
CORE
(
A
)
LOCKNUT
(
B
)
SLEEVE
(
C
)
SHADING
RING
(
D
)
4
5
(
8036365
)
Construction
of
the
High
Dropout
Instantaneous
Unit
FIG
.
MAIN
BRUSH
CONNECTING
BLOCK
CONNECTING
PLUG
TERMINAL
BLOCK
SHORTING
BAR
—
AUXILIARY
BRUSH
NOTE
:
AFTER
ENGAGING
AUXILIARY
BRUSH
CONNECTING
PLUG
TRAVELS
1
/
4
INCH
BEFORE
ENGAGING
THE
MAIN
BRUSH
ON
THE
TERMINAL
BLOCK
(
8025039
)
Cross
Section
of
Drawout
Case
Showing
Position
of
Auxiliary
Brush
FIG
.
6
15
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GEI
-
44233
PANEL
LOCATION
SEMI
-
FLUSH
SURFACE
(
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8
MM
)
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MTG
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6
MM
#
.
250
^
VIEW
SHOWING
ASSEMBLY
OF
HATOWARE
FOR
SURFACE
MTG
ON
STEEL
PANELS
iL
•
500
rtl
2
MM
)
TYPICAL
(
133
MM
)
5.2
5
'
DRILL
(
10
HOLES
)
(
I
9
MM
)
PANEL
DRILLING FOR
SEMI
-
FUJSH
MOUNTING
CFRONT
VIEW
)
PANEL
DRILLING
FOR
ym
ING
*
FIG
.
7
(
K
-
6209271
-
6
)
Outline
and
Panel
Drilling
for
the
Type
IAC
66
K
Relays
GENERAL
ELECTRIC CO
.
,
POWER
SYSTEMS
MANAGEMENT
BUSINESS
DEPT
.
,
MALVERN
,
PA
.
19355
6
-
80
II
-
58
*
P
7
NTC
°
M
IF
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