Motor Relay

Comprehensive, economical protection for low- and medium-voltage motors
• Improve motor availability with our accurate, patented thermal model.
• Reliably track motor temperature without false tripping for cyclic overloads.
• Save panel space with the SEL-749M Motor Relay’s compact design.
• Develop maintenance plans using motor start reports and trends.

Applications

Low- and Medium-Voltage Motor Protection—Protect low- and medium-voltage induction and synchronous motors. The reliable and economical SEL-749M also protects three-phase motors, including two-speed and reduced-voltage start motors.

Extensive Communications and Software—Communicate seamlessly with built-in SEL ASCII and optional Modbus protocols. Quickly and easily set the SEL-749M with the included Microsoft Windows-based acSELerator QuickSet SEL-5030 Software. View start reports, motor trends, and real-time motor values with the complete meter and control features included in acSELerator Software.

Comprehensive Start Reports and Trends—Track motor performance during the critical starting period with complete motor start reports and 30-day average motor start trending. Only SEL offers this valuable tool for tracking motor performance.

Option Cards for Added Functionality—Customize the relay for your particular protection and control applications. Field-install option cards into the base relay to obtain voltage-based protection/control, increased digital I/O, and 4–20 mA analog output.