GE IFC51AD User manual

INSTRUCTIONS
GEK
-
49827
A
INSERT
BOOKLET
GEK
-
45375
OVERCURRENT
RELAYS
TYPES
IFC
51
AD
and
51
BD
IFC
53
AD
and
53
BD
IFC
77
AD
and
77
BD
GENERAL
ELECTRIC
Courtesy of NationalSwitchgear.com

Courtesy of NationalSwitchgear.com

GEK
-
49827
OVERCURRENT
RELAYS
TYPES
IFC
51
AD
and
51
BD
IFC
53
AD
and
53
BD
IFC
77
AD
and
77
BD
INTRODUCTION
These
instructions
plus
those
in
the
included
book
,
GEK
-
45375
,
form
the
instructions
for
these
relays
.
DESCRIPTION
The
Types
IFC
51
AD
,
IFC
53
AD
and
IFC
77
AD
covered
by
these
instructions
are
similar
respectively
to
the
IFC
51
A
,
IFC
53
A
and
IFC
77
A
in
the
included
instructions
except
that
the
target
seal
-
in
units
have
two
elec
-
trically
separate
contacts
.
The
Types
IFC
51
BD
,
IFC
53
BD
and
IFC
77
BD
are
similar
respectively
to
the
IFC
51
B
,
IFC
53
B
and
IFC
77
B
except
that
each
target
seal
-
in
and
instantaneous
unit
has
two
electrically
separate
contacts
.
The
internal
connections
are
included
in
these
instructions
as
tabulated
below
:
Types
Figure
IFC
51
AD
,
-
53
AD
,
-
77
AD
IFC
51
BD
,
-
53
BD
,
-
77
BD
1
2
APPLICATION
The
application
areas
of
these
relays
are
the
same
in
all
respects
to
those
covered
by
the
APPLICATION
section
in
the
included
instructions
,
GEK
-
45375
.
Note
that
the
second
contact
on
the
seal
-
in
unit
,
and
the
instantaneous
overcurrent
unit
when
present
,
is
intended
for
local
alarm
and
/
or
remote
indication
as
shown
on
the
typical
external
connections
in
Figure
3
of
these
instructions
.
All
other
sections
of
the
included
book
,
GEK
-
45375
,
also
apply
to
these
relays
.
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
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GEK
-
49827
T
£
si
INDUCTION
UNIT
HI
—
T
$
SI
>
T
^
SI
<
i
\
i
/
v
M
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V
"
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V
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o
o
0
12
2
6
A
O
O
1
1 1
5
*
=
SHORT
FINGER
FIG
.
1
(
0208
A
8514
-
ll
INTERNAL
CONNECTIONS
FOR
RELAY
TYPES IFC
51
AD
,
IFC
53
A
0
AND
IFC
77
AD
-
FRONT
VIEW
.
4
Courtesy of NationalSwitchgear.com

GEK
-
49827
T
£
SI
INST
.
to
U
INDUCTION
UNIT
T
$
SI
—
INST
.
INST
.
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CUD
L
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c
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c
2
12
6
14
O
o
o
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3
1
5
11
13
INSTANTANEOUS
SETTINGS
:
SET
LINK
TO
"
Hw
FOR
HIGH
RANGE
AND
TO
"
L
"
P
0
R
LOW
RANGE
.
LINK
SHOWN
IN
HIGH
RANGE
POSITION
.
-
K
-
=
SHORT
FINGER
FIG
.
2
(
0208
A
8515
-
1
)
INTERNAL
CONNECTIONS
FOR
RELAY
TYPES
IFC
51
BD
,
IFC
53
BD
AND
IFC
77
BD
-
FRONT
VIEW
.
5
Courtesy of NationalSwitchgear.com

GEK
-
49827
A
-
C
BUS
50
-
1
51
~
i
Ar
Vr
5
o
50
-
2
51
-
2
-
^
F
-
V
50
-
3
51
-
3
A
5
\
Jluf
51
-
N
50
-
N
\
5
6
NOTE
:
50
DEVICr
ER
:
•
2
'
IT
'
-
N
.
Y
IN
IFC
52
B
,
-
54
B
AND
—
78
B
52
IT
r
FEEDER
(
+
)
D
-
C
TRIP
BUS
(
+
)
ALARM
BUS
S
1
^
51
-
1
j
TSI
n
151
-
1
*
13
*
51
-
2
51
-
3
51
-
N
JT
5
jTl
1
hQ
±
50
±
7
~
ST
j
5
tl
T
50
-
1
SAME
AS
PHASE
1
T
50
-
1
12
T
14
'
2
3
ALARM
JR
REMOTE
INDICATION
52
*
PHASES
2
£
3
AND
NEUTRAL
SAME
AS
PHASE
~
1
TC
(
-
)
FIG
.
3
(
0275
AI
903
-
0
)
EXTERNAL
CONNECTIONS
OF FOUR
IFC
RELAYS
USED
FOR
MULTI
-
PHASE
AND
PHASE
TO
GROUND
FAULT
PROTECTION
OF
A
3
-
PHASE
CIRCUIT
.
6
Courtesy of NationalSwitchgear.com

GEK
-
49827
*
TABLE
I
IFC
TOC
SETTINGS
TAPS
AVAILABLE
G
-
S
-
OJ
*
AZ
+
r
£
-
ts
-
fi
3
3
P
£
£
£
A
C
C
\
PC
SIAO
1
X
L
"
/
L
rH
&
n
A
J
J
IFC
5
V
BD
3
A
3
A
A
£
A
[
F
C
7
£
7
=
~
B
\
P
c
r
3
IFC
.
53
BD
1
ft
77
AP
1
PC
77
B
>
D
*
Revised
since
last
issue
7
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GENERAL ELECTRIC
COMPANY
POWER
SYSTEMS
MANAGEMENT
BUSINESS
DEPT
.
MALVERN
,
PA
19355
GENERAL
®
ELECTRIC
*
*
*
-
(
6
/
91
)(
1300
)
Courtesy of NationalSwitchgear.com

GEK
-
45375
J
INSTRUCTIONS
TIME
OVERCURRENT
RELAYS
Types
IFC
51
A
and
51
B
IFC
53
A
and
53
B
IFC
77
A
and
77
B
GE
Protection
and
Control
205
Great
Valley
Parkway
Malvern
,
PA
19355
-
1337
Courtesy of NationalSwitchgear.com

GEK
-
45375
CONTENTS
DESCRIPTION
3
APPLICATION
3
CONSTRUCTION
5
6
RATINGS
6
TIME
OVERCURRENT
UNIT
HIGH
-
SEISMIC
INSTANTANEOUS
UNIT
HIGH
-
SEISMIC
TARGET
AND
SEAL
-
IN
UNIT
CONTACTS
7
8
8
BURDENS
9
CHARACTERISTICS
TIME
OVERCURRENT
UNIT
HIGH
-
SEISMIC
INSTANTANEOUS
UNIT
HIGH
-
SEISMIC
TARGET
AND
SEAL
-
IN
UNIT
10
10
10
10
RECEIVING
,
HANDLING
AND
STORAGE
10
ACCEPTANCE
TESTS
VISUAL
INSPECTION
MECHANICAL
INSPECTION
DRAWOUT
RELAY
TESTING
GENERAL
POWER
REQUIREMENTS
TIME
OVERCURRENT
UNIT
HIGH
-
SEISMIC
INSTANTANEOUS
UNIT
HIGH
-
SEISMIC
TARGET
AND
SEAL
-
IN
UNIT
11
11
11
12
12
12
13
14
INSTALLATION
INSTALLATION
TESTS
15
15
PERIODIC
CHECKS
AND
ROUTINE
MAINTENANCE
.
.
TIME
OVERCURRENT
UNIT
HIGH
-
SEISMIC
INSTANTANEOUS
UNIT
HIGH
-
SEISMIC
TARGET
AND
SEAL
-
IN
UNIT
CONTACT
CLEANING
COVER
CLEANING
SYSTEM
TEST
16
16
16
16
16
17
17
SERVICING
17
TIME
OVERCURRENT
UNIT
HIGH
-
SEISMIC
INSTANTANEOUS
UNIT
HIGH
-
SEISMIC
TARGET
AND
SEAL
-
IN
UNIT
17
19
19
RENEWAL
PARTS
20
LIST
OF
FIGURES
40
-
2
-
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