Siemens SIPROTEC 7SA610 Distance Protection Relay

 ·        The SIPROTEC 7SA6 distance protection relay is a universal relay for protection, control and automation with a 4-line displayon the basis of the SIPROTEC 4 system.

·        Its high level of flexibility makes it suitable to be implemented at all voltage levels.

·        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)

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

·        High resistance earth-fault protection for single and three-pole 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 (50/51/67)

·        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)