SIEMENS SIPROTEC 7SD82 LINE DIFFERENTIAL NUMERICAL RELAY

SIEMENS SIPROTEC 7SD82 LINE DIFFERENTIAL NUMERICAL RELAY

The line differential protection relay SIPROTEC 7SD82 ispart of the new SIPROTEC 5 series of modular field devices. This device isespecially designed for cost effective and compact medium voltage andsub-transmission application areas. With its flexibility and itshigh-performance DIGSI 5 engineering tool, the SIPROTEC 7SD82 fits perfectlyfor protection, control, monitoring, and measuring applications in electricalenergy systems

Main function:

  Line differentialprotection for medium and sub-transmission

Tripping:3-pole, min. tripping time 9 ms

Inputs and outputs:-4 current transformers,-4 voltagetransformers (optional),-11 or 23 binary inputs,-9 or 16 binary outputs

Hardware flexibility: Various hardware quantity structuresare available for binary inputs and outputs in the 1/3 base module, it is notpossible to add 1/6 expansion modules,available with large and small displayHousingwidth:1/3 19 inch

All functions can be configured freely with DIGSI 5. For theapplication of some of the functions, you require the appropriate number offree function points within the device. The function point calculator in theonline configurator provides support in determining the required number offunction points for your device.

    Minimum tripping time: 19 ms
    Main protection function is differential protection with adaptive algorithm for maximum sensitivity and stability even with the most different transformer errors, current-transformer saturation and capacitivecharging currents
    Directional backup protection and various additional functions
    Detection of ground faults of any type in isolated or arc-suppression-coil-ground systems using the following functions: 3I0>, V0>, fleeting contact, Cos-/SinPhi, harmonic, dir. detection of intermittent ground faults and admittance
    Ground fault detection using the pulse location method
    Detection of current-transformer saturation
    Arc protection
    Automatic frequency relief for load shedding in case of underfrequency, taking account of changed infeed conditions due to decentralized power generation
    Power protection, configurable as active or reactive power protection
    Reactive power-undervoltage protection (QU protection)
    Detection of current and voltage signals up to the 50th harmonic with high accuracy for selected protection functions (such as thermal overload protection) and operational measured values
    Control, synchrocheck and switchgear interlocking protection
    Graphical logic editor to create powerful automation functions in the device
    Single line representation in small or large display
    Integrated electrical Ethernet RJ45 for DIGSI 5 and IEC 61850 (reporting and GOOSE)
    2 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, PROFINET IO)
    Serial protection data communication via optical fibers, two-wire connections and communication networks (SDH networks, MPLS networks, for example using IEEE C37.94, and others), including automatic switchover between ring and chain topology
    Redundancy protocols PRP and HSR
    Cyber security to NERC CIP and BDWE Whitepaper requirements
    Phasor Measurement Unit (PMU)Â for synchrophasor measured values and IEEE C37.118 protocol
    Time synchronization using IEEE 1588
    Powerful fault recording (buffer for a max. record time of 80 sec. at 8 kHz or 320 sec. at 2 kHz)
    Auxiliary functions for easy tests and commissioning