41
Date Code 20210405
Instruction Manual
SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System
Specifications
Specifications
Compliance
Designed and manufactured under an ISO 9001 certified quality
management system
CE Mark
RoHS compliant
General
Operating Temperature
–40° to +85°C (–40° to +185°F)
Storage Temperature
–40° to +85°C (–40° to +185°F)
Operating Environment
Pollution Degree:
2
Relative Humidity:
5%–95%, noncondensing
Maximum Altitude:
2000 m
Ingress Protection
SEL-FT50, SEL-RP50:
IP67
SEL-FR12:
IP3X
Clamp Range (SEL-FT50)
FT50-0001/FT50-0003/
FT50-0005/FT50-0006:
6.35 mm to 31.75 mm (0.25 in to
1.25 in)
FT50-0004/FT50-0007:
7.6 mm to 27.9 mm (0.3 in to 1.1 in)
RP50-0001:
6.35 mm to 31.75 mm (0.25 in to
1.25 in)
Dimensions
SEL-FT50
FT50-0001/FT50-0003/
FT50-0005/FT50-0006:
141.7 mm diameter x 177.0 mm height
(5.58 in. diameter x 6.97 in. height)
FT50-0004/FT50-0007:
145 mm diameter x 148 mm height
(5.71 in. diameter x 5.83 in. height)
RP50-0001:
141.7 mm diameter x 177.0 mm heigh
(5.58 in. diameter x 6.97 in. height)
SEL-FR12
44 mm x 243 mm x 117 mm (1.73 in x 9.57 in x 4.61 in)
Weight
SEL-FT50
FT50-0001/FT50-0003/
FT50-0005/FT50-0006:
0.85 kg (1.9 lb)
FT50-0004/FT50-0007:
0.6 kg (1.3 lb)
RP50-0001:
0.85 kg (1.9 lb)
SEL-FR12
0.54 kg (1.20 lb)
Connection Cables (SEL-FR12)
Wire Size:
12–24 AWG
Wire Type:
Copper, 60°/75°C solid or stranded
Insulation:
50 V minimum
Torque
Ground Wire
Minimum:
0.9 Nm (8 in-lb)
Maximum:
1.4 Nm (12 in-lb)
Power Supply Wires
Minimum:
0.5 Nm (4.4 in-lb)
Maximum:
0.6 Nm (5.3 in-lb)
Overvoltage
Category III (SEL-FT50 and SEL-FR12)
Insulation Class
SEL-FT50, SEL-RP50:
Class III
SEL-FR12:
Class I
System
Power System Frequency Range
45–65 Hz
Current Pickup Level (rms)
Note:
Units are individually configurable.
50, 100, 200, 400, 600, 800, 1000, 1200 A
Fault Detection Accuracy (FT50-0001/FT50-0003/FT50-0005/
FT50-0006)
All Fault Thresholds:
3% typical, 20% maximum
Fault Detection Accuracy (FT50-0004/FT50-0007)
50 A Threshold:
50%
100 A, 200 A Threshold:
30%
400 A Threshold and Above: 20%
System Latency—Fault Detection to Relay Input for FT50-0001/
FT50-0003/FT50-0005/FT50-0006
From Link Active State:
6 ms typical, 16 ms maximum
From SEL-FT50 Sleep State: <100 ms for fault currents less than 400 A
<16 ms for fault currents greater than
400 A
System Latency—Fault Detection to Relay Input for FT50-0004/
FT50-0007
From Link Active State:
6 ms typical, 16 ms maximum
From SEL-FT50 Sleep State: <100 ms for fault currents less than 400 A
<30 ms for fault currents between
400 A and 600 A
<16 ms for fault currents greater than
600 A
System Latency—Addition Fault Detection Delay from RP50-0001
From SEL-FT50 Fully
Awake State
(Load Current > 40 A):
+1 ms typical per SEL-RP50 in line
From SEL-RP50 Semi-
Awake or Sleep State
(Load Current 0–40 A):
+1 ms typical, +6 ms maximum for first
SEL-RP50 in line
+1 ms typical for 2nd through 5th
SEL-RP50 in line
Maximum Voltage
38 kV (L-L)
Maximum Steady-State Load Current
FT50-0001/FT50-0003/
FT50-0005/FT50-0006:
600 A (Thermal Rating)
FT50-0004/FT50-0007:
400 A
RP50-0001:
600 A (Thermal Rating)
Maximum Fault Current
25 kA for 10 cycles
Power
SEL-FT50 Minimum Radio Link Active Current
FT50-0001/FT50-0003/
FT50-0005/FT50-0006:
5 A
FT50-0004/FT50-0007:
15 A
