4 FEATURES AND FUNCTIONS
4.1 CURRENT DIFFERENTIAL PROTECTION FUNCTIONS
Feature IEC 61850 ANSI
Phase segregated current differential protection DifPDIF1 87L
Between 2 and 6 terminal lines/cables
Self-synchronization feature
InterMiCOM
64
telepr
otection for direct device-to-device
communication (optional)
4.2 PROTECTION FUNCTIONS
Feature IEC 61850 ANSI
Tripping Mode (1 & 3 pole) PTRC
ABC and ACB phase rotation
Phase overcurrent , with optional directionality (4 stages) OcpPTOC/RDIR 50/51/67
Earth/Ground overcurrent stages, with optional directionality (4
stages)
EfdPTOC/RDIR 50N/51N/ 67N
Sensitive earth fault (SEF) (4 stages) SenPTOC/RDIR 50N/51N/67N
High impedance restricted earth fault (REF) SenRefPDIF 64
Negative sequence overcurrent stages, with optional
dir
ectionality (4 stages)
NgcPTOC/RDIR 67/46
Broken conductor, used to detect open circuit faults 46
Thermal overload protection ThmPTTR 49
Undervoltage protection (2 stages) VtpPhsPTUV 27
Overvoltage protection (2 stages) VtpPhsPTOV 59
Remote overvoltage protection (2 stages) VtpCmpPTOV 59R
Residual voltage protection (2 stages) VtpResPTOV 59N
Underfrequency protection (4 stages) FrqPTUF 81
Overfrequency protection (2 stages) FrqPTOF 81
Rate of change of frequency protection (4 stages) DfpPFRC 81
High speed breaker fail suitable for re-tripping and back-
tripping (2 stages)
RBRF 50BF
Current Transformer supervision 46
Voltage transformer supervision 47/27
Auto-reclose (4 shots) RREC 79
Check synchronisation (2 stages) RSYN 25
4.3 CONTROL FUNCTIONS
Feature IEC 61850 ANSI
Watchdog contacts
Read-only mode
Function keys FnkGGIO
P54A/B/C/E Chapter 1 - Introduction
P54xMED-TM-EN-1 7