Introduction - ABB Relion 670 Series Technical Reference Manual

Section 6
Impedance protection
6.9.1
304
Function description
Distance protection zone, quadrilateral
characteristic, separate settings (zone
1)
Distance protection zone, quadrilateral
characteristic, separate settings (zone
2-5)
Function description
Directional impedance quadrilateral

Introduction

The line distance protection is up to five zone full scheme protection with three fault
loops for phase-to-phase faults and three fault loops for phase-to-ground fault for each
of the independent zones. Individual settings for each zone in resistive and reactive
reach gives flexibility for use as back-up protection for transformer connected to
overhead lines and cables of different types and lengths.
Mho alternative quadrilateral characteristic is available.
ZMRPDIS (21) together with Phase selection, quadrilateral characteristic with settable
angle FRPSPDIS (21) has functionality for load encroachment, which increases the
possibility to detect high resistive faults on heavily loaded lines, as shown in figure 73.
IEC 61850 IEC 60617
identification identification
ZMRPDIS
S00346 V1 EN
ZMRAPDIS
S00346 V1 EN
IEC 61850 IEC 60617
identification identification
ZDRDIR Z<->
1MRK505222-UUS C
ANSI/IEEE C37.2
device number
21
21
ANSI/IEEE C37.2
device number
21D
Technical reference manual