Overcurrent protection device as line protection backup
SIPROTEC 5 base module with large display
The feeder and overcurrent protection SIPROTEC 7SJ86 is part of the new SIPROTEC 5 series of modular, flexible and intelligent digital field devices.With its modularity and flexibility and its high-performance DIGSI 5 engineering tool, the SIPROTEC 7SJ86 fits perfectly for protection, control, monitoring, and measuring applications in electrical energy systems and for reserve or emergency protection for the line protection devices.
Inputs and outputs:
3 predefined standard variants with 4/4 current/voltage transformers,
11 to 23 binary inputs,
9 to 25 binary outputs
Flexibly adjustable and expandable I/O quantity structure within the scope of the SIPROTEC 5 modular system
Width of housing:
1/3 x 19'' to 2/1 x 19''
All functions can be configured freely with DIGSI 5. For the application of some of the functions, you require the appropriate number of free function points within the device. The function point calculator in the online configurator provides support in determining the required number of function points for your device.
Overcurrent protection with 3-pole tripping
Optimization of the tripping times by direction comparison and protection data communication
Recognition of static, intermitting and transient ground faults (transient function) in resonant-grounded and iso-lated networks
Overvoltage and undervoltage protection
Frequency protection and frequency change protection for load shedding applications
Power protection, configurable as active or reactive power protection
Protection functions for capacitor banks, e.g. overcurrent, thermal overload, current unbalance, peak overvoltage or differential protection
Undervoltage-controlled reactive power protection
Control, synchrocheck and system interlocking
Circuit-breaker failure protection
Circuit-breaker restrike protection
Powerful automation with graphical CFC (Continuous Function Chart)
Support of single line in small and large displays
Integrated electrical Ethernet port J for DIGSI and IEC 61850 functionality (reporting)
Two optional pluggable communication modules, usable for different and redundant protocols (IEC 61850, IEC 60870-5-103, IEC 60870-5-104, Modbus TCP, DNP3 (serial and TCP)
Serial protection data communication via fiber-optic cable, two-wire connections and communication net-works (IEEE C37.94 et al.) including automatic switch between ring and chain topology
High available Ethernet redundancy protocols PRP and HSR
Cyber Security acc. NERC CIP and BDEW Whitepaper
Phasor Measurement Unit (PMU) for synchrophasor-measured values and IEEE C37.118 protocol
Time synchronization using IEEE 1588
Powerful fault recording
Additional functions for simple tests and easy commissioning.
The overcurrent protection device SIPROTEC 7SJ86 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:
Reserve or emergency protection for the line protection
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 bus-bars
Protection and monitoring of capacitor banks
Phasor Measurement Unit (PMU)
Reverse power protection
Application templates are available in DIGSI for standard applications. They comprise all basic configurations and default settings.
The following application templates are available:
7SJ86 non-directional overcurrent protection
7SJ86 directional overcurrent protection
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