Function Block - ABB Relion 670 Series Technical Reference Manual

Section 6
Impedance protection
6.6.3
282
directional element that works on a per phase base. The release signals are per phase
and to have a release of a measuring element in a specific phase both the additional
directional element, and the normal directional element, for that phase must indicate
correct direction.
Normal
directional
element
A, B, C
Additional
directional
element
ANSI06000419 V1 EN
Figure 145: Ground distance element directional supervision

Function block

ZDMRDIR (21D)
I3P* DIR_CURR
V3P* DIR_VOLT
DIR_POL
PUFW
PUREV
STDIRCND
ANSI06000422-2-en.vsd
ANSI06000422 V2 EN
Figure 146: ZDMRDIR (21D) function block
ZDARDIR
I3P* FWD_G
V3P* REV_G
I3PPOL* DIREFCND
DIRCND
ANSI06000425-2-en.vsd
ANSI06000425 V2 EN
Figure 147: ZDARDIR function block
Release of distance
measuring element
A, B, C
AND
AND per
phase
en06000419_ansi.vsd
1MRK505222-UUS C
Technical reference manual