The line differential protection relay SIPROTEC 7SD82 is a universal protection, control and automation device on the basis of the SIPROTEC 5 system. It is especially designed for the protection of feeders and lines.

Typical applications are:

• Line protection for all voltage levels with 3-pole tripping
• Phase-selective protection of overhead lines and cables with single- and multi-ended infeeds of all lengths with up to 6 line ends
• Transformers and compensating coils in the protection zone
• Detection of ground faults in isolated or resonant-grounded systems with radial, ring-shaped or meshed topology
• Serial protection data communication over different distances and physical media such as fiber-optic cable, 2-wire connections and communication networks
• Phasor Measurement Unit (PMU)

Application templates are available in DIGSI for standard applications. They comprise all basic configurations and default settings.

The following application templates are available:

• Basic differential protection
• Differential protection for overhead line