SEL-751A | Schweitzer Engineering Feeder Protection Relay

Description 

The SEL-751A by Schweitzer Engineering is a sophisticated Feeder Protection Relay. With advanced features, it offers precise fault detection, monitoring, and control in power distribution systems. Its versatility and reliability make it a key component for ensuring grid stability and protection.

Technical Specifications 

Information About SEL-751A

Complete Feeder Protection
Maximize control scheme flexibility using time- and instantaneous-overcurrent, overvoltage, undervoltage, and frequency elements with breaker failure protection for one three-pole breaker.

Optional Protection Features
Use the SEL-751A with one of the voltage input options to provide over- and underfrequency, rate-of-change-of-frequency, and over- and undervoltage protection as well as synchronism check, dc station battery monitoring, arc-flash detection, and power and demand metering.

Convenient Controls
Use the four programmable pushbuttons on the front panel for quick, personalized control.

Easy Communications
Choose from Ethernet or serial communications and several protocols, including Mirrored Bits communications and IEC 61850. Pick multiple sessions of Modbus TCP, Modbus Serial, DNP3 LAN/WAN, or DNP3 serial for custom configuration of your applications.

Expanded SELogic Control Equations
Use math and logic combinations of analog and digital values for customized applications. Adapt system control based on prefault conditions. Scale analog values and latch momentary inputs for SCADA retrieval.

Reclosing Control
Match various reclosing practices using the programmable four-shot recloser with optional synchronism check.

Rugged Design
Trust the industry’s widest ambient operating temperature range, –40° to +85°C (–40° to +185°F). The SEL-751A withstands vibration, electrical surges, fast transients, and extreme temperatures, meeting stringent industry standards. A conformal-coating option for the printed circuit boards provides an additional barrier to airborne contaminants, such as hydrogen sulfide, chlorine, salt, and moisture. In addition, the SEL-751A is ATEX- and Underwriters Laboratories (UL) Class I, Division 2-certified for use in hazardous and potentially explosive environments.

Automatic Notification
Alert key personnel to problems automatically with direct SEL-3010 Event Messenger support.

Easy Installation
Easily install into existing locations using available retrofit kits and mounting adapters, with no cutting or drilling.

Flexible Design
Choose from many installation and integration options with a small form factor and slide-in expansion cards.

Manufacturer information

Schweitzer Engineering Laboratories, Inc. (SEL) is a leading manufacturer of power system protection, control, and automation solutions. Renowned for innovation, SEL products enhance the reliability and efficiency of electric power systems worldwide.

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