4 FEATURES AND FUNCTIONS
4.1 CURRENT DIFFERENTIAL PROTECTION FUNCTIONS
Feature IEC 61850 ANSI
Phase segregated current differential protection DifPDIF1 87L
Neutral current differential protection (optional) DifPDIF2 87N
2 and 3 terminal lines/cables
Feeders with in-zone transformers 87T
Suitable for use with SDH/SONET networks (using P594)
GPS time synchronization (optional)
4.2 DISTANCE PROTECTION FUNCTIONS
Feature IEC 61850 ANSI
Distance zones, full-scheme protection (6) 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)
Cross-country fault detection
InterMiCOM
64
teleprotection for direct device-to-device
communication (optional)
4.3 PROTECTION FUNCTIONS
Feature IEC 61850 ANSI
Tripping Mode (1 & 3 pole) PTRC
ABC and ACB phase rotation
Chapter 1 - Introduction P543i/P545i
8 P54x1i-TM-EN-1
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