Over-voltage protection relay / under-voltage / over-current / arc flash
Schweitzer Engineering Laboratories
over-voltage, under-voltage, over-current, arc flash, temperature
programmable, configurable, multifunction, adjustable
Feeder Protection Relay
The SEL-751 Feeder Protection Relay is ideal for directional overcurrent, fault location, arc-flash detection, and high-impedance fault detection applications. Flexible I/O options, easy mounting, and fast settings make the SEL-751 the right solution for industrial and utility feeder protection. The SEL-751 provides complete feeder protection, with overcurrent, overvoltage, undervoltage, directional power, IEC cable/line thermal, vector shift, sensitive earth fault (SEF), load encroachment, and frequency elements. Easily upgrade protection without cutting or drilling existing cutouts, with a small form factor and multiple mounting adapters. Quickly integrate into serial- or Ethernet-based communications with IEC 61850 Edition 2, IEC 60870-5-103, the IEC 62439 Parallel Redundancy Protocol (PRP), Mirrored Bits communications, DeviceNet, Modbus, DNP3, and other protocols.