Sel SEL-751A - SEL-751 A Option Card Usage; General Safety Precautions; Option Card Description; Installation Procedure

2
Typical Connections
RX
T
X
+
—
+
—
+
—
+
—
+
—
+
—
+
—
+
—
+
—
+
—
5 4 3 2 1
9 8 7 6
5 4 3 2 1
9 8 7 6
Ethernet
Port 4 DeviceNet
(Optional)
V–
CAN_L
SHIELD
CAN_H
V+
A
C
B
52
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
-/N+/H
IA IB IC IN
Z07Z06
CURRENT INPUTS
VOLTAGE INPUTS (Optional)
Z05Z04Z03Z02Z01E04E03E02E01
NVCVBVA
Z08
TX+
TX–
RX+
RX–
SHIELD
(Optional)
Port 4A EIA-48
5
IRIG-B Time Source
≤ 500 m
F
O 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
TCCC
Feeder
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.
** 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
Power Supply
110–230 Vac
24–48 Vdc
110–250 Vdc
(Optional
485)
(Optional)
(Optional)
Fiber-Optic
Input
Fiber-Optic
Output
SEL-2600 Series
External
RTD Module
(Optional)
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