Description

Siemens Siprotec 4 SIPROTEC 7SA61 Protection Relay

Siemens Siprotec 4 Siprotec 7SA61 Distance Protection Relay For All Voltage Levels

The SIPROTEC 7SA6 distance protection relay is a universal relay for protection, control and automation with a graphic display on the basis of the SIPROTEC 4 system.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 trapping by distance protection in the event of CT saturation.-Phase-segregated teleportation for improved selectivity and availability-Digital relay-to-relay communication by means of an integrated serial protection data interface-Adaptive auto-reclosure (ADT).

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

COMMUNICATION INTERFACES

• Front interface for connecting a PC
• System interface for connecting to a control system via various protocols
  – IEC 60870-5-103 protocol
  – PROFIBUS-FMS/-DP
  – DNP 3.0
  – IEC 61850 Ethernet
• 1 serial protection data interface for teleprotection
• Rear-side service/modem interface
• Time synchronization via – IRIG-B or DCF 77 or – System interface

The comprehensive range of Reyrolle products provides the total protection requirements of distribution markets and industrial applications – ranging from overcurrent protection via transformer protection and voltage control to a full spectrum of auxiliary and trip relays. The portfolio includes many famous products such as “Argus, “Duobias”, “Solkor”, “Rho, etc. Through successive generations, Reyrolle numerical products have been developed to increase value to system operators. Discover the portfolio!