Distance protection for all voltage levels
SIPROTEC 7SA64
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.
Features
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)
Hardware
- Binary inputs: 13 to 33
- Binary outputs: 9 to 33
- Power relays: 4 / 8
- Graphical display
- Detached operator panel
Communication interfaces
System port
– IEC 61850– IEC 60870-5-103
– PROFIBUS DP
– DNP 3– 2 analog outputs 0...20 mA
- Service port
– DIGSI 4
– Modem
- 1 serial protection data interface for teleprotection
- Front port
– DIGSI 4 - Time synchronization via IRIG B, DCF 77 or system interface
Functions
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
