4 FEATURES AND FUNCTIONS
4.1 DISTANCE PROTECTION FUNCTIONS
Feature IEC 61850 ANSI
Distance zones, full-scheme protection (5) DisPDIS 21/21N
Phase characteristic (Mho and quadrilateral)
Ground characteristic (Mho and quadrilateral)
CVT transient overreach elimination
Load blinder
Easy setting mode
Communication-aided schemes, PUTT, POTT, Blocking, Weak
Infeed
DisPSCH 85
Accelerated tripping – loss of load and Z1 extension
Switch on to fault and trip on reclose – elements for fast fault
clearance on breaker closure
SofPSOF/ TorPSOF 50SOTF/27SOTF
Power swing blocking PsbRPSB 68
Directional earth fault (DEF) unit protection 67N
Out of step OstRPSB 78
Delta directional comparison - fast channel schemes operating
on fault generated superimposed quantities
78DCB/78DCUB
Mutual compensation (for fault locator and distance zones)
InterMiCOM
64
teleprotection 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
directionality (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
Chapter 1 - Introduction P446SV
8 P446SV-TM-EN-1