GE ICR51A User manual

INSTRUCTIONS
6
EH
-
1783
J
PHASE
SEQUENCE
AND
UNDERVOLTAGE
RELAYS
TYPES
ICR
53
B
ICR
54
A
ICR
51
A
ICR
53
A
ICR
54
B
GENERAL
ELECTRIC
Courtesy of NationalSwitchgear.com

GEH
—
1783
Phase
Sequence
And
Undervoltage
Relays
Type
ICR
OUTER
BLOCK
CRADLE
LATCH
INNER
,
,
«
<
#
»
«
BL
0
CK
m
INNER
BLOCK
'
%
i
9
;
J
m
mmtts
'
'
-
^
mrnm
T
*
'
*
*
*
w
-
'
*
*
*
'
*
••••
•
»
•
.
£
i
>
-
OUTER
BLOCK
CASE
RESET
BUTTON
COVER
CONNECTING
PLUGS
(
8014332
)
Type
ICR
53
A
Relay
,
Unit
Disassembled
(
Front
View
)
Figure
1
T i
I
|
!
I
1
I
'
!
7
I
p i
1
VOLTS
TO
CLOSE
LETT
CONTACT
79
*
OF
flATtD
VOLTS
34
32
30
-
28
26
24
-
22
5
20
.
s
-
I
I
l
>
O
3
T
3
»
2
3
\
u
p
10
-
UJ
l
8
\
10
\
V
V
*
i
6
\
\
T
£
\
\
t
5
W
\
4
-
i
O
*
1
I
v
-
\
\
V
V
V
2
'
o
-
SO
SO
TO
90
too
110
120
9 5
9 5
PER
CENT
Of
RATED
VOLTAGE
Figure
2
A
(
0203
A
8302
-
1
)
Average
Time
Characteristic
of
Relay
Type
ICR
51
A
COVER
PHOTO
(
8014333
)
2
Courtesy of NationalSwitchgear.com

PHASE
SEQUENCE
AND
UNDERVOLTAGE
RELAYS
TYPE
ICR
INTRODUCTION
The
Type
ICR
induction
-
disk
relays
are
designed
to
respond
to
phase
-
sequence
,
open
-
phase
and
undervoltage
.
APPLICATION
The
Type
ICR
relays
are
used
to
protect
AC
machines
from
undervoltage
and
when
starting
from
open
phase
or
reverse
phase
sequence
.
They
will
function
to
stop
the
machine
if
the
voltage
across
the
relay
terminals
falls
below
a
predetermined
value
.
Usually
these
relays
will
not
disconnect
a
running
motor
if
one
phase
of
the
supply
is
open
-
circuited
because
the
motor
will
supply
three
-
phase
potential
to
the
relay
even
with
one
phase
disconnected
from
the
source
.
The
Type
ICR
relays
are
also
used
for
automatic
throw
over
schemes
where
it
is
desired
to
check
the
presence
of
three
-
phase
voltage
of
correct
phase
sequence
.
Figures
4
to
6
show
typical
external
connections
of
the
various
relay
described
in
these
instructions
.
TABLE
I
*
Closing
of
Closed
Contact
(
in
%
of
Calibration
of
Open
Contact
)
Closing
of
Open
Contact
(
in
%
of
Rated
3
-
Phase
Voltage
)
Ave
.
Time
Characteristic
Curve
Relay
Type
Range
of
Adjustment
Factory
Setting
Range
of
Adjustment
Factory
Setting
Figure
2
A
Figure
2
A
Figure
2
B
Figure
2
B
Figure
3
Figure
3
ICR
51
A
(
1
)
ICR
51
A
(
2
)
ICR
53
A
ICR
53
B
ICR
54
A
ICR
54
B
75
-
100
75
-
100
75
-
100
75
-
100
75
-
100
75
-
100
75
90
75
-
100
75
-
100
75
-
100
75
-
100
89
90
89
90
89
90
89
90
(
1
)
ICR
51
A
1
thru
ICR
51
A
11
A
(
2
)
ICR
51
A
21
A
and
higher
*
Indicates
revision
These
instructions
do
not
purport
to
cover
all
details
or
variations
in
equipment
nor
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
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

GEH
-
1783
Phase
Sequence
And
Undervoltage
RelaysType
ICR
T
T
10.0
VOLTS
TO
CLOSE
LEFT
CONTACT
-
*
90
ft
OF
RATED
VOLTS
VOLTS TO
CLOSE
RIGHT
CONTACT
=
80
ft
OF
RATED
VOLTS
600
POINT
DRAG
MAGNET
8.0
6.0
t
/
>
TIM
TO CLOSE
RIGHT
CONTACT
WHEN
VOLTAGE
IS
•
REOUCEO
FROM
RATED
VOLTS
a
o
u
iu
t
/
i
TIME
TO
~
CLOSE
LEFT
CONTACT
x
*
4.0
Ui
X
2.0
0
10
20
30
60
40
50
70 80
90
100
PER
CENT
OF
RATED
VOLTAGE
Figure
2
B
(
0376
A
0950
)
Average
Time
Characteristic
of
Relay
Types
ICR
53
A
and
ICR
53
B
i
.
o
VOLTS
TO
CLOSE
LEFT
CONTACT
-
90
ft
OF
RATED
VOLTS
VOLTS
TO
CLOSE
R
I
GH
T
CONTACT
-
80
ft
OF
RATED
VOLTS
0.8
TINE
TO
CLOSE
RIGHT
CONTACT
WHEN
VOLTAGE
IS
REDUCED
FROM
RATED
VOLTS
i
i
«
/
>
TJME
TO
o
o
0.6
CLOSE
LEFT
CONTACT
c
_
>
Ui
«
/
>
/
UJ
•
—
—
0.4
X
0.2
0
60
10
20
30
70
90
100
40
80
50
PER
CENT
OF
RATED
VOLTAGE
Figure
3
(
0376
A
0949
-
3
)
Average
Time
Characteristic
ICR
54
A
Relay
of
Type
4
Courtesy of NationalSwitchgear.com

GEH
-
1783
Phase
Sequence
And
Undervoltage
RelaysType
ICR
OPERATING
CHARACTERISTICS
ADJUSTMENT
RANGES
AND
OPERATING
TIME
The
range
of
adjustment
and
the
operating
time
characteristic
references
The
values
of
three
-
phase
for
the
various
relays
are
given
in
Table
I
.
voltages
given
are
for
the
proper
sequence
applied
to
the
relay
below
which
the
open
contact
will
open
or
the
closed
contact
(
where
used
)
will
close
.
Unless
a
specific
setting
for
the
relays
is
given
on
the
requisition
,
the
factory
will
set
the
relay
for
the
values
shown
.
The
time
characteristic
curves
referred
to
in
Table
I
are
for
factory
settings
.
RATINGS
The
Type
ICR
relays
are
available
for
120
,
240
,
and
480
volt
circuits
.
CONTACT
RATINGS
The
current
-
carrying
rating
of
the
contact
circuit
is
determined
by
whether
the
relay
has
a
seal
-
in
unit
and
by
the
tap
used
on
the
seal
-
in
coil
.
The
values
for
the
three
possible
arrangements
are
given
in
the
following
table
:
Yes
Yes
Seal
-
In
Unit
No
0.2
amp
2.0
amps
Seal
-
In
Unit
Tap
0.8
amp
3.5
amps
Carry
Continuously
2.0
amps
Carry
for
Trip
Duty
(
250
volt
of
less
)
30
amps
30
amps
5
amps
DC
Resistance
of
Seal
-
In
Coil
0.13
ohms
7
ohms
60
-
Cycle
Impedance
of
Seal
-
In
Coil
52
ohms
0.53
ohms
When
the
contacts
of
the
induction
unit
are
not
by
-
passed
by
the
seal
-
in
The
interrupting
unit
contacts
,
they
may
try
to
interrupt
the
circuit
,
rating
of
the
contacts
for
non
-
inductive
loads
are
as
follows
:
DC
Amps
AC
Amps
Make
and
Interrupt
at
:
1.50
0.30
125
volts
250
volts
600
volts
0.15
0.75
0.00
0.00
5
Courtesy of NationalSwitchgear.com

GEH
-
1783
Phase
Sequence
And
Undervoltage
RelaysType
ICR
BURDENS
The
burdens
imposed
by
the
two
potential
circuits
at
rated
voltage
and
60
cycles
are
as
follows
:
Volts
Coil
Circuit
Watts
Varsft
V
A
PF
120
5
-
6
7
-
8
5
-
6
7
-
8
5
-
6
7
-
8
2.15
0.41
4.70
5.20
120
0.66
2.30
2.40
0.27
240
3.50
13.15
13.3
0.26
240
0.41
6.38
6.40
0.06
480
2.83
23.8
0.12
24.0
480
0.45
23.0
23.0
0.02
tfCapacitive
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
promptly
notified
.
i
2
3
2
i
3
PHASE
SEQUENCE
TO
Close
LEFT
CONTACTS
3
1
PHASE
SEQUENCE
TO
CLOSE
CONTACTS
i
HI
7
6
*
16
7
^
17
47
47
LEFT
UC
1
<
r
-
L
CONTACT
2
~
r
CIRCUIT
47
10
20
Hi
5
yLC
s
7
'
T
'
C
47
6
47
RIGHT
UC
USE
DOTTED
CONNECTIONS
IF
POTENTIAL
TRANSFORMERS
ARE
NOT
USED
.
,
L
1
11
8
y
18
DEVICE
FUNCTION
NUMBERS
47
-
PHASE
SEQUENCE
AND
UNDERVOLTAGE
RELAY
TYPE
ICR
UPPER
COIL
1
C
-
LOWER
COIL
DEVICE
FIJNCT
.
QN
NUMBERS
47
PHASE
SEQUENCE
AND
UNOERVOlTAGf
RELAY
TYPE
ICR
UC
-
UPPER
OPERATING
COIL
LOWER
OPERA
!
INC
COIL
UC
3
2
1
1
2
LC
3
1
f
N
2
113
7
Al
7
3
7
V
'
/
V
3
-
PHASE
4
-
WIRE
il
<
,
*
1
r
uc
v
,
,
LC
47
rcr
.
i
6
^
16
8
^
18
e
>
'
N
Figure
4
(
0376
A
0947
-
3
)
Typical
External
Connections
for
Type
ICR
51
A
Relay
Figure
5
(
0376
A
0953
-
3
)
Typical
External
Connections
for
Type
ICR
53
B
Relay
6
Courtesy of NationalSwitchgear.com

GEH
-
1783
Phase
Sequence
And
Undervoltage
RelaysType
ICR
Reasonable
care
should
be
exercised
in
unpacking
the
relay
in
order
that
none
of
the
parts
are
injured
nor
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
the
operation
of
the
relay
.
DESCRIPTION
The
relays
covered
by
these
instructions
are
identified
by
model
The
main
constructional
differences
of
these
models
are
given
in
the
following
table
and
are
described
under
RELAY
TYPES
.
numbers
.
Model
Contacts
Time
Dial
Seal
-
In
Int
.
Conn
.
Unit
12
ICR
51
A
(
-
)
A
12
ICR
53
A
(
-
)
A
12
ICR
53
B
(
-
)
A
12
ICR
54
A
(
-
)
A
121
CR
54
B
(
—
)
A
One
Open
Double
Throw
Double
Throw
Double
Throw
Double
Throw
Yes
No
Figure
7
Figure
8
Figure
9
Figure
8
Figure
9
No
Yes
No
No
No
Yes
No
No
RELAY
TYPES
The
Type
ICR
51
A
relay
was
designed
for
use
in
three
-
phase
circuits
,
has
a
single
circuit
-
closing
contact
which
opens
on
undervoltage
or
reversed
-
phase
sequence
,
and
a
time
dial
for
adjusting
the
time
delay
with
which
the
contacts
close
.
The
relay
does
not
contain
a
target
.
When
the
relay
is
adjusted
to
open
its
contacts
at
75
%
of
rated
voltage
,
the
time
required
to
close
the
contact
with
rated
voltage
applied
and
the
time
dial
set
on
number
10
is
10
seconds
.
It
The
Type
ICR
53
A
relay
was
designed
for
use
in
three
-
phase
circuits
.
It
has
double
-
throw
,
single
-
pole
contacts
,
undervoltage
or
reverse
phase
sequence
.
The
relay
has
a
target
and
seal
-
in
unit
which
is
in
series
with
its
closed
contact
.
The
relay
does
not
contain
a
time
dial
.
The
left
-
hand
contacts
open
on
When
the
relay
is
adjusted
for
90
%
pickup
and
80
%
dropout
,
the
time
required
to
close
the
normally
-
closed
contacts
,
when
the
voltage
is
suddenly
dropped
from
rated
voltage
to
zero
(
0
)
volts
,
is
1.2
seconds
.
The
Type
ICR
53
B
relay
is
similar
to
the
Type
ICR
53
A
relay
except
that
the
target
and
seal
-
in
unit
is
omitted
.
7
Courtesy of NationalSwitchgear.com

GEH
-
1783
Phase
Sequence
And
Undervoltage
RelaysType
ICR
f
:
QST
?
CL
3
-
S
5
T
r
4
:
X
H
-
i
*
1
s
r
-
*
>
c
±
tz
*
1
V
e
c
11
•
|
20
%
y
VC
TOR
START
.
No
CONTROL
EQUIPMENT
*
A
A
VCTOR
$
TA
*
T
TNG
EQUIPMENT
T
DEVICE
FUNCT
ON
NUMBERS
PHASE
SEQUENCE
AND
UNDERVOLTAGE
RELAY
TYPE
1
CP
L
’
PPER
OPERATING
C
01
L
uO
*
ER
OPERATING
CO
!
L
SEAL
-
IN
UNIT
47
>
'
*
w
*
UC
VV
V
^
v
^
yr
5
7
I
LC
MOTOR
S
I
2
6
8
*
-
SHORT
F
:
NG
-
ER
Figure
6
(
0376
A
0951
-
2
)
Typical
External
Connections
for
Relay
Types
ICR
53
A
and
ICR
54
A
Figure
7
(
0362
A
0629
-
2
)
Internal
Connections
for
Type
ICR
51
A
Relay
(
Front
View
)
15
17
21
11
15
17
t
t
16
18
II
20
16
10
A
A
A
/
v
/
\
A
A
A
A
*
20
A
*
4
*
A
*
A
~
h
£
Cl
C
2
i
-
G
L
E
“
F
1
#
=
P
'
yE
H
7
T
ex
\
A
^
r
*
V
»
*
''
j
)
I
1
I
V
I
10
l
%
8
6
*
-
SHORT
F
I
NGER
*
*
3
HCRT
RMSEK
Figure
8
(
0362
A
0633
-
4
)
Internal
Connections
for
Relay
Types
ICR
53
and
ICR
54
A
(
Front
View
)
Figure
9
(
0362
A
0634
-
4
)
Internal
Connections
for
Type
ICR
53
B
and
ICR
54
B
Relays
(
Front
View
)
8
Courtesy of NationalSwitchgear.com

GEH
-
1783
Phase
Sequence
And
Undervoltage
RelaysType
ICR
CRADLE
TOP
PIVOT
SEAL
-
IN
UNIT
0
;
SK
SHAFT
STATIONARY
BRUSH
ANO
CONTACT
ASSEMBLIES
CAPACITORS
MOVING
-
CONTACTS
WATTMETRIC
ELEMENT
CONTROL
SPRING
—
DISK
DRAG
MAGNET
%
Figure
11
(
8014331
)
Type
ICR
53
A
Relay
,
Unit
in
Cradle
(
Rear
View
)
Figure
10
(
8014330
)
Type
ICR
53
A
Relay
,
Unit
in
Cradle
(
Front
View
)
The
Type
ICR
54
A
relay
is
similar
to
the
Type
ICR
53
A
relay
except
that
it
has
faster
operating
times
.
When
the
relay
is
adjusted
to
pick
up
at
90
%
and
drop
out
at
80
%
of
rated
voltage
,
the
time
required
to
close
the
normally
-
closed
contact
when
the
voltage
instantaneously
drops
from
rated
voltage
to
zero
volts
is
0.17
second
.
The
Type
ICR
54
B
is
similar
to
the
Type
ICR
54
A
relay
except
that
the
target
and
seal
-
in
unit
is
omitted
.
Relay
Types
ICR
53
A
,
ICR
53
B
,
ICR
54
A
,
and
ICR
54
B
contain
a
contact
that
is
closed
when
the
relay
is
de
-
energized
.
For
this
reason
,
these
relays
are
supplied
in
double
-
end
drawout
cases
.
The
external
connections
are
such
that
the
relay
coils
are
energized
when
either
the
upper
or
lower
connection
plug
is
put
in
place
.
The
relay
will
therefore
have
time
to
open
its
closed
contact
before
the
second
connection
plug
can
be
put
in
place
,
necessary
to
have
both
plugs
in
place
before
the
contact
circuits
are
completed
.
It
is
INTERNAL
CONSTRUCTION
The
operating
unit
is
similar
to
that
used
in
a
standard
watthour
meter
,
except
that
the
current
coil
is
replaced
by
a
second
potential
coil
,
induction
disk
(
Figure
10
)
is
embossed
to
ensure
flatness
and
to
give
increased
rigidity
.
The
damping
magnet
consists
of
a
pair
of
alnico
magnets
enclosed
in
a
steel
circuit
.
be
moved
for
time
adjustments
.
The
relays
have
high
pressure
,
silver
-
to
-
silver
contacts
,
contacts
are
adjustable
and
movable
contact
direct
acting
.
The
It
is
mounted
by
clamp
screws
on
a
shelf
along
which
it
can
The
fixed
9
Courtesy of NationalSwitchgear.com

GEH
-
1783
Phase
Sequence
And
Undervoltage
RelaysType
ICR
The
upper
bearings
consist
of
a
polished
steel
pin
and
a
bronze
guide
bearing
.
It
provides
a
definite
alignment
of
the
relay
shaft
.
The
lower
bearing
consists
of
a
polished
steel
pivot
that
is
carried
by
a
jewel
bearing
.
The
jewel
is
seated
on
a
spring
which
minimizes
shock
.
When
used
,
the
seal
-
in
unit
is
mounted
to
the
left
of
the
shaft
as
shown
in
Figure
10
.
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
.
CASE
The
case
is
suitable
for
either
surface
or
semiflush
panel
mounting
and
The
cover
an
assortment
of
hardware
is
provided
for
either
mounting
,
attaches
to
the
case
and
also
carries
the
reset
mechanism
when
one
is
required
.
Each
cover
screw
has
provision
for
a
sealing
wire
.
The
case
has
studs
or
screw
connections
at
both
ends
or
at
the
bottom
only
for
the
external
connections
.
The
electrical
connections
between
the
relay
units
and
the
case
studs
are
made
through
spring
backed
contact
fingers
mounted
in
stationary
molded
inner
and
outer
blocks
between
which
nests
a
removable
connecting
plug
which
completes
the
circuits
.
The
outer
blocks
,
attached
to
the
case
,
have
the
studs
for
the
external
connections
,
and
inner
blocks
have
the
terminals
for
the
internal
connections
.
The
relay
mechanism
is
mounted
in
a
steel
framework
called
the
cradle
and
is
a
complete
unit
with
all
leads
being
terminated
at
the
inner
block
.
This
cradle
is
held
firmly
in
the
case
with
a
latch
at
the
top
and
the
bottom
and
by
a
guide
pin
at
the
back
of
the
case
.
The
cases
and
cradles
are
so
constructed
that
the
relay
cannot
be
inserted
in
the
case
upside
down
.
The
connecting
plug
,
besides
making
the
electrical
connections
between
the
respective
blocks
of
the
cradle
and
case
,
also
locks
the
latch
in
place
.
The
cover
,
which
is
fastened
to
the
case
by
thumbscrews
,
holds
the
connecting
plug
in
place
.
To
draw
out
the
relay
unit
the
cover
is
first
removed
,
and
the
plug
drawn
out
.
Shorting
bars
are
provided
in
the
case
to
short
the
current
transformer
circuits
.
The
latches
are
then
released
,
and
the
relay
unit
can
be
easily
drawn
out
.
To
replace
the
relay
unit
,
the
reverse
order
is
followed
.
10
Courtesy of NationalSwitchgear.com

GEH
-
1783
Phase
Sequence
And
Undervoltage
RelaysType
ICR
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
relays
should
be mounted
on a
vertical
surface
,
panel
drilling
dimensions
are
shown
in
Figures
13
and
14
.
The
outline
and
CONNECTIONS
The
internal
connection
diagrams
are
shown
in
Figures
7
,
8
,
and
9
.
Typical
wiring diagrams
are
shown
in
Figures
4
to
6
.
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
.
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
.
ADJUSTMENTS
PICKUP
The
magnitude
of
voltage
above
which
the
open
contact
will
be
closed
is
determined
by
the
setting
of
the
lower
control
spring
.
To calibrate
the
relay
to
operate
at
a
desired value
of
voltage
,
apply
the
desired
pick
-
up
value
of
voltage
to
the
relay
and
adjust
the lower control
spring
until
the
left
contact
just
closes
.
The lower
control
spring
is
adjusted
by
inserting
the
blade
of
a
screwdriver
in
one
of
the
notches
in
the
periphery
of
the control
-
spring adjusting ring
and
turning
the
adjusting ring
counter
-
clockwise
to
raise
the
pickup
or
clock wise
to
lower
the
pickup
.
DROPOUT
For
Relay
Types
ICR
53
A
,
ICR
53
B
,
and
ICR
54
A
,
the
magnitude
of
voltage
below
which
the
closed
contact
will
be
closed
is
determined
by
the
contact
gap
and the
pick
-
up
setting
.
After
the
pick
-
up
setting
is
made
as
described
above
,
the
contact
gap
is
adjusted
by
loosening
the
two
lock
screws
in
the
clamp
bar
located
at
the
top
of
the
shaft
.
The
moving
contact
of
the
closed
contact
is
connected
to
this
clamp
bar and
can
be
turned
relative
to
the
moving
contact
of
the
open
contacts
.
The lead
-
in
spring
for
the
upper
moving
contact
is
also connected
to
this
clamp
bar
;
therefore
,
changing
the
position
of
the
upper
clamp
bar
will
change
the
pick
-
up
setting
slightly
.
This
can
be
reset
by
changing
the lower
control
spring
as
described
above
.
When
both
pickup
and
dropout
are
set
to
the
desired
value
,
the
locking
screws
of
the
top
clamp
bar
should
again
be
tightened
.
11
Courtesy of NationalSwitchgear.com

GEH
-
1783
Phase
Sequence
And
Undervoltage
RelaysType
ICR
TIME
SETTING
On
the
Type
ICR
51
A
relay
,
the
time
required
for
the
open
contact
to
close
when
rated
voltage
is
applied
to
the
relay
determined
by
the
time
-
dial
setting
.
The
maximum
time
setting
is
obtained
when
the
time
dial
is
set
on
the
number
10
time
-
dial
setting
.
The
time
on
any
other
time
-
dial
setting
is
approximately
proportional
to
the
time
-
dial
setting
.
For
example
,
the
time
to
close
the
contacts
when
set
at
the
number
5
time
-
dial
setting
is
approximately
one
-
half
the
time
required
to
close
the
contacts
when
set
at
the
number
10
time
-
dial
setting
.
For
relay
Types
ICR
53
A
,
ICR
53
B
,
and
ICR
54
A
,
the
time
required
to
close
the
contacts
is
a
function
of
the
pick
-
up
and
drop
-
out
settings
.
It
is
possible
to
set
any
two
of
the
three
variables
.
For
instance
,
if
the
pick
-
up
value
and
the
drop
-
out
time
are
important
,
then
the
pick
-
up
value
can
be
set
as
given
above
.
The
drop
-
out
time
can
be
adjusted
by
adjusting
the
contact
gap
until
the
desired
drop
-
out
time
is
obtained
.
The
value
of
drop
-
out
voltage
will
be
determined
by
the
gap
setting
that
was
made
to
get
the
drop
-
out
time
.
The
value
of
the
drop
-
out
voltage
cannot
be
changed
without
changing
the
drop
-
out
time
.
Typical
test
connections
are
shown
in
Figure
12
.
I
2
3
PHASE
SEQUENCE
TO
CLOSE
LEFT
CONTACTS
VOLTAGE
REGULATORS
1
*
±
*
l
..
4
7
r
nr
?
DEVICE
FUNCTION
47
-
PHASE
SEQUENCE
AND
UNDERVOLTAGE
RELAY
TYPE
ICR
UC
-
UPPER
OPERATING
COIL
LC
-
10
*
ER
OPERATING
COIL
Figure
12
(
0376
A
952
-
3
)
Typical
Test
Connections
for
Type
ICR
Relays
12
Courtesy of NationalSwitchgear.com

GEH
-
1783
Phase
Sequence
And
Undervoltage
RelaysType
ICR
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
plug
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
.
The
tap
plug
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
adjustment
.
Screws
should
not
be
in
both
taps
at
the
same
time
as
pickup
for
DC
will
be
the
higher
tap
value
and
AC
pickup
will
be
increased
.
OPERATION
These
relays
are
of
the
induction
-
disk
construction
,
actuated
by
a
wattmetric
type
operating
unit
,
above
and
below
the
operating
disk
.
Phase
shift
is
provided
in
each
coil
by
a
series
capacitor
to
produce
a
split
-
phase
field
which
develops
torque
on
the
induction
disk
.
The
disk
is
Voltage
coils
are
located
The
torque
produced
by
the
Type
ICR
relay
is
proportional
to
the
product
of
the
two
voltages
applied
to
its
two
potential
circuits
and
the
sine
of
the
angle
between
the
two
applied
voltages
.
This
relationship
makes
the
torque
of
the
relay
proportional
to
the
area
of
the
voltage
triangle
.
'
The
relay
will
operate
when
the
area
of
the
voltage
triangle
is
a
predetermined
value
.
The
relay
will
operate
even
though
this
area
is
reduced
to
this
value
due
to
one
phase
being
low
or
whether
all
three
phases
are
low
.
MAINTENANCE
DISK
AND
BEARINGS
The
lower
jewel
may
be
tested
for
cracks
by
exploring
its
surface
with
the
point
of
a
fine
needle
.
The
jewel
should
be
turned
up
until
the
disk
is
centered
in
the
air
gaps
,
after
which
it
should
be
locked
in
this
position
by
the
set
screw
provided
for
this
purpose
.
CONTACT
CLEANING
For
cleaning
fine
silver
contacts
,
a
flexible
burnishing
tool
should
be
used
.
This
consists
of
a
flexible
strip
of
metal
with
an
etch
-
roughened
surface
,
resembling
in
effect
a
superfine
file
.
The
polishing
action
is
so
delicate
that
no
scratches
are
left
yet
corroded
material
will
be
removed
rapidly
and
thoroughly
.
The
flexibility
of
the
tool
ensures
the
cleaning
of
the
actual
points
of
contact
.
Sometimes
an
ordinary
file
cannot
reach
the
actual
points
of
contact
because
of
some
obstruction
from
some
other
part
of
the
relay
.
13
Courtesy of NationalSwitchgear.com

GEH
-
1783
Phase
Sequence
And
Undervoltage
RelaysType
ICR
Fine
silver
contacts
should
not
be
cleaned
with
knives
,
files
,
or
abrasive
paper
or
cloth
.
Knives
or
files
may
leave
scratches
which
increase
arcing
and
deterioration
of
the
contacts
.
Abrasive
paper
or
cloth
may
leave
minute
particles
of
insulating
abrasive
material
in
the
contacts
and
thus
prevent
closing
.
PERIODIC
TESTING
An
operation
test
and
inspection
of
the
relay
at
least
once
every
six
months
are
recommended
.
Test
connections
are
shown
in
Figure
12
.
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
the
quantity
required
,
the
name
of
the
part
wanted
,
and
give
the
complete
nameplate
data
,
including
the
serial
number
.
If
possible
,
give
the
General
Electric
Company
requisition
number
on
which
the
relay
was
furnished
.
DANEL
LOCATION
SEMI
-
PLUSH
,
MTG
.
SURFACE
MTG
.
,
,
(
—
(
3
)
5
/
16
-
18
STUDS
FOR
SURFACE
MTG
.
6.625
168
MM
L
8.375
212
MM
~
i
9
125
232
MM
*
<
4
)
10
-
32
X
3
/
8
MTG
.
SCREWS
STUD
NUMBERING
1
0
-
32
STUDS
9
7
5
3
1
O
O
O
O
O
OO
O
O
O
10
8
6
v
2
GLASS
I
b
r
LL
1
•
125
29
MM
3
,
o j
“
*
*
I
76
MM
!
~
^
BACK
VIEW
1
/
4
DRILL
4
HOLES
6.187
157
MM
6
MM
5
/
8
DRILL
2
HOLES
15
MM
J
CUTOUT
MAY
REPLACE
DRILLED
HOLES
LV
1
4.4
06
1
12
MM
1156
29
MM
2.187
56
MM
r
t
.
L
i
!
-
Sr
-
r
-
CUTOUT
%
76
MM
*
1
i
4.375
1
1
1
MM
~
T
8.812
223
MM
T
3.906
|
99
MM
*
\
4
281
l
08
MM
T
1
46
,
8
i
L
-
f
>
-
OrlO
^
O
^
O
37
MM
I
1
I
o
J
I
*
I
.
718
18
MM
^
2.5
C
2.843
72
MM
6
MM
L
—
_
218
^
^
5
MM
PANEL
218
^
.
500
12
MM
(
TYPICAL
)
5.25
i
i
5
MM
i
133
MM
5.687
i
144
MM
3
/
4
DRILL
10
HOLES
19
MM
PANEL
DRILLING
FOR
SEMI
-
FLUSH
MOUNTING
FRONT
VIEW
PANEL
DRILLING
FOR
SURFACE
MOUNTING
FRONT
VIEW
CASE
5
/
16
-
18
STUD
3.0
76
MM
VIEW
SHOWING
ASSEMBLY
OF
HARDWARE
FOR
SURFACE
MTG
.
ON
STEEL
PANELS
TYPICAL
DIM
.
INCHES
MM
Figure
13
(
K
-
6209271
[
8
|
)
Outline
and
Panel
Drilling
Dimensions
for
the
Type
ICR
51
A
Relay
*
Indicates
revision
14
Courtesy of NationalSwitchgear.com

GEH
-
1783
Phase
Sequence
And
Undervoltage
Relays
Type
ICR
PANEL
LOCATION
SEMI
-
FLUSH
-
<
2
)
5
/
16
-
18
STUDS
FDR
SURFACE
MTG
,
SURFACE
6.625
168
MM
1
0
-
32
r
STUDS
,
MTG
MTG
J
19
17
15
13
11
O
O
O
G
O
O
O
O
O
O
20
18
16
14
12
9.875
250
MM
10
312
2
b
1
MM
STUD
NUMBERING
SCREWS
9
7
5
3
1
O
O
O
O
O
O
O
O
O
O
10
8
6
4
2
1
0
-
32
STUDS
GLASS
_
i
=
—
L
1
.
125
29
MM
75
BACK
VIEW
CUTDUTS
MAY
REPLACE
F
DRILLED
HOLES
19
MM
1
/
4
DRILL
4
HOLES
3.0
6
,
187
157
MM
76
MM
6
MM
II
I
I
1
*
o
4.875
123
MM
O
5.000
127
MM
5
/
8
DRILL
2
HOLES
1
5
MM
—
2.781
71
MM
1
1.75
46
MM
t
I
r
i
3.50
88
MM
-
t
%
?
t
i
<
0
9.75
247
MM
5
,
562
142
MM
CUTbUT
10.000
254
MM
I
4.50
I
11
4
MM
4
.
"
T
I
I
0
o
1
,
468
37
MM
1
J
.
718
1
8
MM
2.50
'
2.843
72
MM
6
MM
.
218
.
218
-
.
500
12
MM
(
TYPICAL
)
5
MM
5
MM
5.25
5
,
687
133
MM
PANEL
144
MM
3
/
4
DRILL
20
HDLES
1
9
MM
T
PANEL
DRILLING
FDR
SEMI
-
FLUSH
MOUNTING
FRONT
VIEW
PANEL
DRILLING
FOR
SURFACE
MOUNTING
FRONT
VIEW
C A
5
/
16
-
18
STUD
3
,
0
TYPICAL
DIM
.
76
MM
INCHES
VIEW
SHOWING
ASSEMBLY
OF
HARDWARE
FDR
SURFACE
MTG
.
DN
STEEL
PANELS
MM
Figure
14
(
K
-
6209272
[
7
]
)
Outline
and
Panel
Drilling
Dimensions
for
Relay
Types
ICR
53
A
,
ICR
53
B
,
and
ICR
54
A
*
Indicates
revision
15
Courtesy of NationalSwitchgear.com

å
åå
å
*( 3RZHU 0DQDJHPHQW
215 Anderson Avenue
Markham, Ontario
Canada L6E 1B3
Tel: [phone]
Fax: [phone]
www.ge.com/indsys/pm
Courtesy of NationalSwitchgear.com