Introducing the SEL-787L Line Current Differential Relay

This webinar introduces the versatile SEL-787L Line Current Differential Relay and its applications. Built on the foundation of the successful and widely used SEL-700 series relays, the SEL-787L provides protection in a variety of two-terminal applications.

We cover its key features, capabilities, and applications, including:

• Differential protection for overhead lines, underground cables, and inverter-based resource (IBR) tie lines.
• Phase, ground, and negative-sequence current differential elements and their performance in the SEL-787L.
• Line current differential protection components that enable the relay to operate securely against CT saturation and communications-related impairments.
• Application of the SEL-787L on communications links that use direct point-to-point fiber or multiplexers for line current differential communications.
• Additional features, such as an LCD touchscreen, low-energy analog (LEA) sensor inputs, arc-flash protection, high-impedance fault detection, and advanced directional elements.