2
RX
TX
+
— +
— +
— +
— +
—
+
— +
— +
— +
— +
—
5 4 3 2 1
9 8 7 6
5 4 3 2 1
9 8 7 6
Po
rt 4 D
evic
eNet
(O
ptional)
Open-Delta Potential and Residual Ground CT Connections
Typical Wiring
Prot.
Alarm
OUT101
OUT102
OUT103
A01 A02 A03 A04 A05 A06 A07 A08 A09 A10 A11
A12
IRIG-B
IA
IB
IC
IN
Z07
Z06
Z05
Z04
Z03
Z02
Z01
Z08
TX+
TX–
RX+
RX–
SHIELD
(O
ptional)
Po
rt 4A EI
A-
48
5
IRIG-B Time Source
500 m
FO Cable**
1–12 RTDs
Optional Input Output Cards
10 RTDs
4 Digital Inputs / 4 Digital Outputs
3 Digital Inputs / 4 Digital Outputs / 1 Analog Output
8 Analog Inputs
4 Analog Inputs / 4 Analog Outputs
Front
Port 3
TC
CC
8 Digital Inputs
(+)
(–)
52B
52A
Close
Circuit
Trip
Circuit
IN101 IN102
CONTROL INPUTS
INPUT POWER
OUTPUT CONTACTS
SEL-751A Feeder Protection Relay
A diagram for a
four-wire wye
connection is also
available in the
instruction manual.
Power Supply
110–230 Vac
24–48 Vdc
110–250 Vdc
(Optional
485)
(Optional)
Fiber-Optic Input
Fiber-Optic Output
SEL-2600 Series
External
RTD Module
(Optional)
** SEL Fiber Optic Cables
240-1506 — 1 m (3.3 ft) ST/ST
240-1507 — 5 m (16.4 ft) ST/ST
240-1508 — 15 m (49.2 ft) ST/ST
Other lengths available by request
A
C
B
Line
52
Bus
Optional Ethernet (single or dual)
Copper Wire
OR
Multimode Fiber
(+)
(–)
CURRENT INPUTS
VOLTAGE INPUTS (Optional)
TX
RX
TX
RX
TX
RX
TX
RX
E0
7 E08
E09
E10
AF1
AF2
AF3
AF4
AR
C-FLA
SH INPUT
S (
OP
TIONAL
)
To SEL-C804
Sensors
VA VB VC N VS NS VBAT
VBAT
E01 E02 E03 E04 E05 E06 E07 E08
V—
CAN_L
SHIELD
CAN_H
V+
GND +/H -/N
Typical Connections
