SEL-751A | Schweitzer Engineering Feeder Protection Relay

Schweitzer Engineering · HMIs & Displays

Description  The Schweitzer Engineering SEL-751A is a feeder protection relay designed to provide advanced fault detection, monitoring, and control for power distribution systems. It supports a wide range of protective functions, enabling precise and dependable operation in utility and industrial applications. Built for flexibility and robust performance, the SEL-751A enhances grid reliability and system stability.     Technical Specifications Condition New/Never Used Surplus Brand Schweitzer Engineering Category Protection Relays / Power Distribution Part Number SEL-751A Subcategory Feeder Protection Relay Protection Functions Overcurrent, over/undervoltage, over/underfrequency, ROCOF (optional) Breaker Failure Protection Yes, for one three-pole breaker Arc-Flash Detection Optional Reclosing Four-shot programmable recloser Control Interface Four programmable pushbuttons Communications Ethernet, serial, IEC 61850, Modbus TCP/Serial, DNP3 LAN/WAN/serial, Mirrored Bits Logic Engine SELogic control equations Operating Temperature –40°C to +85°C (–40°F to +185°F) Environmental Protection Optional conformal coating Hazardous Location Rating ATEX, UL Class I Division 2 Installation Retrofit kit and mounting adapter support Expansion Slide-in expansion cards for I/O and communication       Information About SEL-751A The SEL-751A is part of Schweitzer Engineering Laboratories’ protective relay family, engineered to deliver comprehensive feeder protection using time-overcurrent, instantaneous-overcurrent, voltage, and frequency protection elements. Designed for high configurability, it offers optional capabilities such as synchronism check, arc-flash detection, dc battery monitoring, and demand metering when used with compatible voltage inputs. Communications flexibility is a key feature, with support for Ethernet, serial protocols, IEC 61850, Modbus, DNP3, and Mirrored Bits for custom integration into SCADA and protection systems. Its rugged construction meets stringent environmental requirements, making it suitable for harsh conditions including hazardous locations requiring Class I Division 2 certification. Key Features: Comprehensive feeder protection: Includes overcurrent, voltage, and frequency elements. Optional advanced functions: Arc-flash detection, synchronism check, ROCOF, and battery monitoring. Programmable controls: Four configurable front-panel pushbuttons. Flexible communications: Supports Ethernet, serial, IEC 61850, DNP3, Modbus, and Mirrored Bits. SELogic control equations: Enables custom logic, analog scaling, and input latching for SCADA. Four-shot recloser: Programmable reclosing with optional synchronism check. Rugged construction: Operates from –40°C to +85°C and withstands surges, vibration, and contaminants. Hazardous location certified: ATEX- and UL Class I, Division 2-certified. The SEL-751A delivers the reliability and precision required for modern feeder protection and power system monitoring.

Brand: Schweitzer Engineering · Category: HMIs & Displays

Key features

• Comprehensive feeder protection: Includes overcurrent, voltage, and frequency elements.
• Optional advanced functions: Arc-flash detection, synchronism check, ROCOF, and battery monitoring.
• Programmable controls: Four configurable front-panel pushbuttons.
• Flexible communications: Supports Ethernet, serial, IEC 61850, DNP3, Modbus, and Mirrored Bits.
• SELogic control equations: Enables custom logic, analog scaling, and input latching for SCADA.
• Four-shot recloser: Programmable reclosing with optional synchronism check.
• Rugged construction: Operates from –40°C to +85°C and withstands surges, vibration, and contaminants.
• Hazardous location certified: ATEX- and UL Class I, Division 2-certified.

Specifications

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