Distance protection for all voltage levels

Distance protection for all voltage levels – SIPROTEC 7SA63

SIPROTEC 7SA63

The SIPROTEC 7SA63 distance protection relay is a universal relay for protection, control and automation with a graphic display on the basis of the SIPROTEC 4 system.

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Features & functions

Distance protection for all voltage levels SIPROTEC 7SA63

Features

Its high level of flexibility makes it suitable to be implemented at all voltage levels. With this relay you are ideally equipped for the future: it offers security of investment and also saves on operating costs.

  • High-speed tripping time

  • Impedance setting range allows very small settings for the protection of very short lines

  • Self-setting detection for power swing frequencies up to 7 Hz

  • Current transformer saturation detector prevents non-selective tripping by distance protection in the event of CT saturation.

  • Phase-segregated teleprotection for improved selectivity and availability

  • Digital relay-to-relay communication by means of an integrated serial protection data interface

  • Adaptive auto-reclosure (ADT)

 

Hardware

  • Binary inputs: 13 to 33
  • Binary outputs: 12 to 33
  • Power relays: 4 / 8
  • Graphical display
  • Surface-mounting or flush-mounting housing

Communication interfaces

  • System port 
    – IEC 61850

    – IEC 60870-5-103 
    – PROFIBUS DP
    – DNP 3 

    – 2 analog outputs 0...20 mA

  • Service port
    – DIGSI 4
    – Modem
  • 1 serial protection data interface for teleprotection
  • Front port
    – DIGSI 4
  • Time synchronization via IRIG B, DCF 77 or system interface

Functions

Protection functions

  • Non-switched distance protection with 6 measuring systems (21/21N)
  • High resistance earth-fault protection for single and three-phase tripping (50N, 51N, 67N)
  • Earth-fault detection in isolated and resonant-earthed networks
  • Tele (pilot) protection (85)
  • Fault locator (FL)
  • Power-swing detection/tripping (68/68T)
  • Phase-overcurrent protection (50/51)
  • Switch-onto-fault protection(50HS)
  • STUB bus overcurrent protection (50STUB)
  • Overvoltage/undervoltage protection(59/27)
  • Over/underfrequency protection (81O/U)
  • Auto-reclosure (79)
  • Synchro-check (25)
  • Breaker failure protection (59BF)
  • Thermal overload protection (49)

Control functions

 

  • Commands for control of c.b. and isolators

Monitoring functions

  • Trip circuit supervision (74TC)

  • Self-supervision of the relay

  • Measured-value supervision

  • Event logging

  • Fault logging

  • Oscillographic fault recording

  • Switching statistics

Front design

  • Easy operation with numeric keys

  • Function keys

  • LEDs for local alarm

  • PC front port for convenient relay setting

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