html{display:none} SEL-411L Advanced Line Differential Protection, Automation, and Control System - Specifications | Schweitzer Engineering Laboratories


AC Current Inputs (6 total)
5 A nominal
1 A nominal
AC Voltage Inputs (6 total)300 VL-N continuous
Serial3 rear-panel and 1 front-panel EIA-232 serial ports; SEL ASCII commands, SEL Fast Messages, DNP3, IEEE C37.118 synchrophasors
EthernetCommunications protocols include FTP, Telnet, synchrophasors, DNP3 LAN/WAN, PRP, PTPv2, and IEC 61850 Edition 2 (optional). For PTPv2 implementation, Ports 5A and 5B must be used for engineering access and SCADA.
Choose from the following port options:
  • Four 10/100BASE-T twisted-pair network ports
  • Four 100BASE-FX fiber-optic network ports
  • Two 10/100BASE-T twisted-pair network ports and two 100BASE-FX fiber-optic network ports
Traveling-Wave Fault Locating (SEL-411L-1 only)Type: Double-ended method
Accuracy: ±25 m for step change in current applied simultaneously to both relays
TiDL PortsFiber-optic ports: 8
Range: ~2 km
Data rate: 100 Mbps
Protocol: SEL T-Protocol
SV Ports Subscriber: As many as 7 SV data streams
Data rate: 4.8 kHz for 60 Hz systems, 4 kHz for 50 Hz systems
Protocol: IEC 61850-9-2
Precise-Time InputDemodulated IRIG-B time input and PTPv2
SynchrophasorsSynchrophasor measurement:
IEC/IEEE 60255-118-1:2018 (IEEE Std. C37.118.1:2011, 2014a)

Synchrophasor data transfer:
IEEE Std. C37.118.2:2011

Up to 50 messages per second (50 Hz system)
Up to 60 messages per second (60 Hz system)

UDP multicast capability
ProcessingAC voltage and current inputs: 8,000 samples per second
Protection and control processing: 8 times per power system cycle
Power Supply24–48 Vdc
48–125 Vdc or 110–120 Vac
125–250 Vdc or 110–240 Vac
Operating Temperature–40° to +85°C (–40° to +185°F)