Distance protection relay Siemens Power Transmission Distribution
The SIPROTEC 4 7SA6 distance protection relay for all voltage levels is a universal device for protection, control and automation on the basis of the SIPROTEC 4 system. Its high level of flexibility makes it suitable to be implemented at all voltage levels between 5 to 765 kV. 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
• Low-impedance setpoints to protect also very short lines
• Self-setting power swing detection for frequencies up to 7 Hz
• Current transformer saturation detector ensures fast tripping and highest distance measurement accuracy
• 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)
One of the communication interfaces is system interface for connecting to a control system via IEC 61850 Ethernet protocol.
