SEL-751

The SEL-751 is a widely deployed feeder protection relay designed for distribution networks and industrial power systems. It provides fast and reliable protection against phase, ground, and directional faults. The relay supports arc-flash detection using optical sensors, significantly improving personnel safety. Its modular I/O, advanced SELogic automation, and flexible CT/VT configurations make it ideal for complex distribution automation schemes. SEL-751 supports numerous communication protocols including IEC 61850, DNP3, Modbus, and MIRRORED BITS® teleprotection. The relay’s high reliability and rugged SEL construction make it a preferred choice for utilities and industrial plants worldwide.

Key Features

• Overcurrent and directional protection

• Arc-flash optical detection

• Fault locator and event analysis

• Modular I/O and automation logic

• IEC 61850 and SCADA communication

• High durability for field environments

Applications

• MV/LV feeders

• Industrial distribution panels

• Arc-flash safety systems

• Recloser and sectionalizer control

Keywords

SEL-751, feeder relay, arc flash relay, SEL feeder protection, IEC 61850 feeder relay