The overcurrent protection device SIPROTEC 7SJ82 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 feeder and overcurrent applications are:
Detection of short circuits in electric operational equipment of radial networks, lines which are supplied from one or two sides, parallel lines and open or closed looped networks of all voltage levels
Detection of ground faults in isolated or resonant-grounded systems with radial, ring-shaped or meshed topology
Backup protection of differential protective schemes of all types of lines, transformers, generators, motors, and busbars
Protection and monitoring of capacitor banks
Phasor Measurement Unit (PMU)
Reverse power protection
Load shedding applications
Switchover automation.
Application templates
Application templates are available in DIGSI for standard applications. They comprise all basic configurations and default settings.
The following application templates are available:
Non-directional overcurrent protection
Overcurrent protection (non-directional) for phases and ground
Transformer inrush current detection
Directional overcurrent protection – grounded system
Overcurrent protection (directional and non-directional) for phases and ground
Transformer inrush current detection
Measuring voltage failure supervision
Directional overcurrent protection – resonant-grounded / isolated system
Overcurrent protection (directional and non-directional) for phases
Sensitive directional ground fault detection for static ground faults
Sensitive directional ground fault detection for transient and static ground faults ("transient" function)*
