Product Description
The SIPROTEC 7SA64 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 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)
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