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Home » Products » SIEMENS Siprotec Protection Relay » 7SA522 Distance Protection Relay For Transmission Lines

7SA522 Distance Protection Relay For Transmission Lines

7SA522 Distance Protection Relay For Transmission Lines
7SA522 Distance Protection Relay For Transmission Lines
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Product Code : 7SA522
Brand Name : SIEMENS
Price And Quantity
  • Minimum Order Quantity
  • 1 Piece
  • Unit of Measure
  • Piece/Pieces
  • Price
  • 1 Lakh INR
Product Description

The SIPROTEC 7SA522 relay provides full-scheme distance protection and incorporates all functions usually required for the protection of a power line. The relay is designed to provide fast and selective fault clearance on transmission and subtransmission cables and overhead lines with or without series capacitor compensation. The power system star point can be solid or resistance grounded (earthed), resonant-earthed via Peterson coil or isolated. The SIPROTEC 7SA522 is suitable for single-pole and three-pole tripping applications with and without tele (pilot) protection schemes.

The SIPROTEC 7SA522 incorporates several protective functions usually required for transmission line protection.

·         High-speed tripping time

·         Suitable for cables and overhead lines with or without series capacitor compensation

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

·         Digital relay-to-relay communication for two and three terminal topologies

·         Adaptive auto-reclosure (ADT)

FunctionsProtection functions

·         Non-switched distance protection with 6 measuring systems (21/21N)

·         High resistance ground (earth)-fault protection for single and three-phase tripping (50N, 51N, 67N)

·         Tele (pilot) protection (85)

·         Fault locator (FL)

·         Power swing detection / tripping (68/68T)

·         Phase-overcurrent protection (50/51)

·         STUB bus overcurrent protection (50STUB)

·         Switch-onto-fault protection (50HS)

·         Over/undervoltage protection (59/27)

·         Over/underfrequency protection (81O/U)

·         Auto-reclosure (79)

·         Synchro-check (25)

·         Breaker failure protection (50BF)

Control functions

·         Commands for control of CB 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

·         User-friendly local operation with numeric keys

·         LEDs for local alarm

·         PC front port for convenient relay setting

·         Function keys

Communication interfaces

·         Front interface for connecting a PC

·         System interface for connecting to a control system via various protocols 
- IEC 61850 Ethernet 
- IEC 60870-5-103 protocol 
- PROFIBUS-FMS/-DP 
- DNP 3.0

·         2 serial protection data interfaces for tele (pilot) protection

·         Rear-side service/modem interface

·         Time synchronisation via IRIG B or DCF77 or system interface

Hardware

·         Binary inputs: 8/16/24

·         Output relays: 16/24/32

·         High-speed trip outputs: 5 (optional)


RELISERV SOLUTION
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RELISERV SOLUTION
Office No.-9, Plot 53/54, Sector-34, Space Heights, Near Tawa Hotel, Kamothe, Navi Mumbai - 410209, Maharashtra, India
Phone :91-22-64525500
Mr. Piyush Lalchand Rathi (Partner)
Mobile :+919819614841, +919769207841
Mr. Rajesh Sawale
Mobile :+919819614841, +919769207841