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
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;
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m
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'
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-
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T
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*
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-
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*
*
*
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*
••••
•
»
•
.
£
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