Full-Scheme Distance Protection, Quadrilateral For Earth Faults; Zmmpdis (21), Zmmapdis (21); Introduction - ABB Relion 670 Series Technical Reference Manual

1MRK505222-UUS C
6.5
6.5.1
Technical reference manual
Full-scheme distance protection, quadrilateral for
earth faults ZMMPDIS (21), ZMMAPDIS (21)
Function description
Fullscheme distance protection,
quadrilateral for earth faults (zone 1)
Fullscheme distance protection,
quadrilateral for earth faults (zone 2-5)

Introduction

The line distance protection is a , up to five zone protection with three fault loops for
phase-to-ground fault for each of the independent zones. Individual settings for each
zone resistive and reactive reach give flexibility for use on overhead lines and cables of
different types and lengths.
The Full-scheme distance protection, quadrilateral for earth faults functions ZMMDPIS
(21) and ZMMAPDIS (21) have functionality for load encroachment, which increases
the possibility to detect high resistive faults on heavily loaded lines , see figure 73.
Impedance protection
IEC 61850 IEC 60617
identification identification
ZMMPDIS
S00346 V1 EN
ZMMAPDIS
S00346 V1 EN
Section 6
ANSI/IEEE C37.2
device number
21
21
261