7SA64 Relay
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)
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