The L60 provides fast and secure sub-cycle phase comparison protection, for both two-terminal and three-terminal lines, lines with series compensation and for single-pole and three-pole tripping applications. The L60 can operate using existing power line carrier or fiber optic communications, and compensates for channel asymmetry and charging currents. The L60 can provide complete support of dual-breaker line terminals by using multiple current inputs.

Key Benefits

• Extremely fast and secure phase comparison protection with a typical tripping time of ¾ power cycle
• End-to-end communication over power line carrier provides cost-effective solution
• Advanced IEC 61850 Ed. 1 and Ed. 2 certified implementation, complete settings via SCL files and flexible process bus support (IEC 61850-9-2LE or IEC 61850-9-2 Hardfiber) ensures interoperability, device managing optimization and reduced cost of ownership
• Routable GOOSE (R-GOOSE) enables GOOSE messages going beyond the substation, which enables wide area protection and control applications
• Robust network security enabling Critical Infrastructure Protection through user command logging, and dual permission access control
• Three-zone high-speed backup phase and ground distance function
• Advanced fault and disturbance recording, including internal relay operating signals, eliminating the need for external recording devices
• Application flexibility - multiple I/O options, programmable logic (FlexLogic™), modularity, customizable to specific requirements
• Embedded IEC61850 protocol
• Application flexibility with multiple I/O options including high density I/O, programmable logic, modularity, and specific customization
• An integrated large, full color display, provides real-time visualization and control of the protected bay, via a bay mimic as well as annunciator functionality and graphical visualization of phasors

Applications

• Short and long overhead lines and cables of different voltage levels
• Suitable for two- and three-terminal lines
• Circuits with tapped transformer feeders
• Implicit direct transfer trip for breaker failure applications