SIEMENS 7SJ82 保護電驛 (IEC 61850)

The overcurrent protection device 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 branches and lines.

The following application templates are available:

7SJ82 Non-directional overcurrent protection

  • Overcurrent protection (non-directional) for phases and ground
  • Transformer inrush current detection.

7SJ82 Directional overcurrent protection – grounded system

  • Overcurrent protection (directional and non-directional) for phases and ground
  • Transformer inrush current detection
  • Measuring voltage failure supervision

7SJ82 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)*
  • Transformer inrush current detection
  • Measuring voltage failure supervision.
  • Directional and non-directional time overcurrent protection with additional functions
  • Time optimization of the tripping times by direction comparison and protection data communication
  • Recognition of static and transient ground faults (transient function*) in resonant-grounded and isolated networks
  • Overvoltage and undervoltage protection in all required versions
  • Power protection, configurable as active or reactive power protection
  • Frequency protection and frequency change protection* for load shedding applications
  • Special overvoltage and unbalance protection for capacitance banks*
  • Control, synchrocheck and system interlocking
  • Powerful automation with graphical CFC (Continuous Function Chart)
  • Integrated electrical Ethernet port J for DIGSI
  • Complete IEC 61850 (reporting and GOOSE) via integrated port J
  • Two optional pluggable communication modules usable for different and redundant protocols (IEC 61850, IEC 60870-5-103, DNP3 (serial+TCP), Modbus RTU Slave, protection data communication)
  • Secure serial protection data communication, also over long distances and all available physical media (fiber-optic cable, two-wire connections and communication networks)
  • Measurement of operational values
  • Phasor Measurement Unit (PMU) for synchrophasor measured values and IEEE C37.118 protocol
  • Powerful fault recording
  • Consistent monitoring concept
  • Additional functions for simple tests and easy commissioning.

7SJ82 spec

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