SIPROTEC 7SA61 - 4xI 4xV, text display, 1-/3-pole tripping

SIPROTEC 7SA61 - Distance protection for all voltage levels

(phase-out product)

4xI 4xV, text display, 1-/3-pole tripping

The SIPROTEC 7SA6 distance protection relay is a universal relay for protection, control and automation with a 4-line display on the basis of the SIPROTEC 4 system. Its high level of flexibility makes it suitable to be implemented at all voltage levels.

Features

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 tele protection 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: 5 to 33
• Binary outputs: 6 to 33
• Power relays: 4 / 8
• Text 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 tele protection
• Front port
  • DIGSI 4
• Time synchronization via IRIG B, DCF 77 or system interface

Product homepage - downloads from the internet (catalogue, certificates, firmware, manuals,...)

www.siemens.com/7SA61

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 (50BF)
• 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