SIPROTEC 4 7SA6 - Distance protection Relay for all Voltage Levels
Description
The SIPROTEC 4 7SA6 distance protection relay 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. 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 teleprotection for improved selectivity and availability
− Digital relay-to-relay communication by means of an integrated serial protection data interface
− Adaptive auto-reclosure (ADT)
Function overview
Protection functions
• 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)
Control function
• Commands f. ctrl. of CBs 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 w. 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 61850 Ethernet
– IEC 60870-5-103 protocol
– PROFIBUS-FMS/-DP
– DNP 3.0
• 1 serial protection data interface for teleprotection
• Rear-side service/modem interface
• Time synchronization via
– IRIG-B or DCF 77 or
– system interface
The SIPROTEC 4 7SA6 distance protection relay 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. 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 teleprotection for improved selectivity and availability
− Digital relay-to-relay communication by means of an integrated serial protection data interface
− Adaptive auto-reclosure (ADT)
Function overview
Protection functions
• 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)
Control function
• Commands f. ctrl. of CBs 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 w. 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 61850 Ethernet
– IEC 60870-5-103 protocol
– PROFIBUS-FMS/-DP
– DNP 3.0
• 1 serial protection data interface for teleprotection
• Rear-side service/modem interface
• Time synchronization via
– IRIG-B or DCF 77 or
– system interface
