html{display:none} SEL-400G Advanced Generator Protection System - Specifications | Schweitzer Engineering Laboratories


AC Current Inputs (18 total) 5 A nominal
1 A nominal
5 A/1 A/0.2 A nominal (Y terminal only)
AC Voltage Inputs (6 total)0–300 VL-N operational
Output ContactsThe relay supports Form A and C outputs.
Optoisolated Control Inputs

DC/AC control signals: 24, 48, 110, 125, 220, and 250 V

Communications Protocols Modbus TCP, FTP, Telnet, SEL ASCII, SEL Fast Message, synchrophasors, DNP3, PRP, PTPv2, and IEC 61850 Edition 2 (optional)
Communications PortsSerial Ports
One front-panel and three rear-panel EIA-232 serial ports
300–57,600 bps
Four-Port Ethernet Card
Four 10/100BASE-T twisted-pair network ports, or
Four 100BASE-FX fiber-optic network ports, or
Two 10/100BASE-T twisted-pair network ports and two 100BASE-FX fiber-optic network ports
Five-Port Ethernet Card
Two 100/1000BASE SFP ports
Three 100BASE SFP ports
Precise-Time InputDemodulated IRIG-B time input and PTPv2
Frequency and Phase Rotation System frequency: 50, 60 Hz
Phase rotation: ABC, ACB
Frequency tracking: 5–120 Hz (requires ac voltage inputs)
Autosynchronizing Control: As many as three breakers
Control pulse modes: Proportional width, fixed duration, and proportional frequency
Power Supply 24–48 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)