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Productmanager Distance Protection Michael Claus EV S V 13 Nürnberg H Phone: +49 911 433 8261

SIPROTEC 4. 7SA522 Distance Protection for Transmission Lines. Productmanager Distance Protection Michael Claus EV S V 13 Nürnberg H Phone: +49 911 433 8261 Fax: +49 911 433 8301 Email: Michael.Claus@nbg6.siemens.de. 7SA522 Distance Protection for Transmission Lines.

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Productmanager Distance Protection Michael Claus EV S V 13 Nürnberg H Phone: +49 911 433 8261

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  1. SIPROTEC 4 7SA522 Distance Protection for Transmission Lines Productmanager Distance Protection Michael Claus EV S V 13 Nürnberg H Phone: +49 911 433 8261 Fax: +49 911 433 8301 Email: Michael.Claus@nbg6.siemens.de

  2. 7SA522Distance Protection for Transmission Lines

  3. SIPROTEC 7SA522 Front design • Navigation Keys • convenient menu operation • 4-line back-lit display • Measured values • Fault data 4 freely assignable function keys with slot for legend text • Turning ON/OFF of functions • Control of switchgear (plant) 14 LED´s for user assignment and slot to insert legend text • 9-pole • service interface • standard cable • DIGSI 4 Width of housing 1/2 of 19" or 1full 19“ rack • Proven numeric keypad • secure entry of numbers • easy password entry

  4. SIPROTEC 7SA522 Terminals and Communication Interfaces • Open to new techniques (methods) • electric or fibre optic (FO) • process or 2nd remote relay interface Width of housing1/2 of 19" or full 19" Binary inputs 8 (16*, 24*) Output contacts 16 (24*,32*) (*in full 19“ rack housing) • Remote relay interface (plan) • electric or fibre optic (FO) • for protection signalling • System interface • electric or fibre optic • IEC60870-5-103 or Profibus FMS (approx. 12/00) • in future DNP3.0, MODBUS and Profibus DP 4 Voltage Transformers (VT) 4 Current Transformers (CT)option with Ienormal or Iesensitive • Service interface • electrical or fibre optic (FO) • DIGSI 4 via Modem • Time synchronization • GPS • with IRIG-B and DCF-77

  5. 7SA522Connection Diagram: Basic Version • Optional • Sensitivity: • normal • high (5mA) • Connection: • Ven • Vsync • Vx

  6. ! 7SA522Single Line Diagram

  7. SIPROTEC 7SA522 Scope of functions (1) ANSI-No. • Distance Protection • quadrilateral and/or MHO characteristic • full scheme measurement with sophisticated loop selection • three phase and single phase tripping • five independent zones and one controlled overreach zone • all zones can be set forward/reverse/non-directional • with/without parallel line compensation • special filtering for CVT transients • special algorithm for detection and compensation of CT saturation • Fault Locator with/without parallel line compensation • Universal teleprotection interface (PUTT, POTT, Blocking, Unblocking, DTT...) 21, 21N FL 85-21 17.10.97 en513all7

  8. SIPROTEC 7SA522 Scope of functions (2) ANSI-No. • High resistance earth fault protection for earthed systems • directional and/or non-directional • 4 stages • definite-time and/or inverse-time characteristic • high sensitivity (3 mA secondary) • backup protection running in parallel to the distance protection • Teleprotection interface for earth fault protection (Directional comparison, Blocking, Unblocking) • Weak infeed protection(Echo and Trip) • Power swing blocking/out-of-step tripping 50N, 51N, 67N 85-67N WI 68 17.10.97 en513all8

  9. SIPROTEC 7SA522 Scope of functions (3) ANSI-No. 50, 5150N-2, 51N-2 59 50HS 50-STUB 79 25 50BF • Overcurrent protection DMTL/IDMTL as parallel or emergency function • Overvoltage protection • Fast tripping with switch-onto-fault condition • STUB Bus Overcurrent protection • Single and three pole multishot automatic reclosure • Synchro-check • Circuit-breaker failure protection

  10. SIPROTEC 7SA522 Scope of functions (4) ANSI-No. 74TC 86 FR 47 • Trip Circuit Supervision • Lock Out • Oscillographic Fault Recording • Voltage Phase Sequence • Interfaces • Time synchronization (IRIG-B, DCF77) • User interface#1 (on the front for DIGSI 4) • User-(Service-)interface #2 (on the rear, DIGSI 4/Modem) • System interface (IEC60870-5-103/Profibus FMS*/others) • Remote relay interfaces #1 (planned for teleprotection) • Remote relay interfaces #2 (planned for teleprotection) * available in Version 4.2 approx. 1. Q/01

  11. SIPROTEC 7SA522 Quadrilateral Zone Characteristic

  12. SIPROTEC 7SA522 MHO Zone Characteristic

  13. MHO characteristic Effect of polarization Example: 2 phase fault B-C Symbols: ZR zone setting VBC measured fault voltage IB, IC measured fault currents k pol polarization factor (0.15%)

  14. 7SA522 - Trip time curves at SIR = 1

  15. 7SA522 - Parallel-line compensation: connection and setting

  16. 7SA522 - Fault locator

  17. Configuration 7SA522 - Teleprotection Schemes

  18. 7SA522 - Phase segregated Teleprotection 2 2 L2-E Z1 Z1B L1-E 1 1 B A Z1 Z1B • A1 trips single-phase in L1 with a phase-segregated L1-receive-signal • Maximum of Selectivity Note: 3 binary channels for both directions are requested or (in preparation) one serial link

  19. 7SA522 - Teleprotection with three-terminal lines Software provides teleprotection of three-terminal lines without additional logic

  20. 7SA522 - Echo and Tripping in case of no-infeed or weak-infeed Configuration Settings Matrix The receive signal is derived from : and *Three-terminal schemes are supported as well Phase segregated weak-infeed tripping ! Note: The echo signal must be marshalled in addition to the send signal on the transmission signal contact 17.10.97 en513ase2

  21. 7SA522High Resistance Earth Fault Protection (1) • Earth (zero sequence) current protection, 4 stages • 3 definite-time stages • 1 inverse-time stage: IEC, logarithmic inverse or ANSI characteristicthis stage can also be used as a 4th definite-time stage • Directional determination with 3V0 and/or Ipol of an earthed power transformer • Directional determination with V2 and I2 (negative sequence) • Sensitive 3I0-measurement with a dynamic from 0.005 A to 100 x In • Elimination of higher harmonics with special digital filters • Inrush-stabilisation with I0/100Hz • Teleprotection: Directional comparison, Blocking or Unblocking • Operation with weak infeed trip and echo • Instantaneous trip after switch-onto-fault

  22. 7SA522High Resistance Earth Fault Protection (2) Definite-time characteristic

  23. 7SA522High Resistance Earth Fault Protection (3) Inverse-time characteristic: IEC

  24. 7SA522High Resistance Earth Fault Protection (4)

  25. 7SA522High Resistance Earth Fault Protection (5)

  26. 7SA522 High Resistance Earth Fault Protection (6) Tripping characteristic Logarithmic Inverse t T3I0pmax (P3145) T3I0p (P3144) 3I0p(P3140) Example: t = 5.8 - 1.35 ln(3I0 / 3I0p) T3I0min (P3141) 3I0 / 3I0p 3I0p Startpoint(P3154)

  27. 7SA522 High Resistance Earth Fault Protection (6) Filter characteristic for stages 3I0>>> and 3I0>>

  28. 7SA522 High Resistance Earth Fault Protection (7) Filter characteristic for stages 3I0> and Inverse time stage

  29. 7SA522 - STUB protection for 11/2-circuit breaker arrangement Release of STUB-stage with open line isolator:

  30. Operating system monitoring Auxiliary voltage failure Measured value detection Buffer battery Hardware–Watchdog Software–Watchdog Working memory Program memory Parameter memory Sampling frequency 1/5 A–setting Calibration data Earth current transformer sensitive/normal Modules (I/O Boards) ! 7SA522 - Monitoring Plausibility monitoring • Current sum • Current symmetry • Open conductor • Fuse Failure • 1- / 2-pole failures • 3-pole failures • Voltage sum • Voltage symmetry • Voltage phase rotation new

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