Siemens Siprotec 4 SIPROTEC 7SA64 Protection Relay

Protection Functions: ، 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 circuit breakers and isolators ، Monitoring Functions: ، Trip circuit supervision (74TC) ، Self-supervision of relay ، Measured-value supervision ، Event and fault logging ، Oscillographic fault recording ، Switching statistics ، Front Design: ، Easy numeric keypad operation ، Function keys ، LEDs for local alarm indication ، Front PC port for DIGSI 4 configuration ، Communication Interfaces: ، Front interface for PC ، System interface for control systems: ، IEC 61850 Ethernet ، IEC 60870-5-103 protocol ، PROFIBUS-FMS / DP ، DNP 3.0 ، Serial teleprotection interface ، Rear service/modem interface ، Time synchronization via IRIG-B, DCF77, or system interface