ABB Relion 670 series - Page 312

A built-in supervision feature within high-speed distance protection itself, based on phase current
change, will ensure that the FUFSPVC blocking signal is received in time. Namely, an intentional
time delay will be introduced if no current magnitude change greater than 5% of IBase has been
detected for any of the three phase currents.
7.8.7.6 Measuring principles
Quadrilateral characteristic
GUID-32E76D16-41ED-4CEF-B081-8413211AA783 v5
ZMFPDIS implements quadrilateral and mho characteristic in all the six zones separately. Set
OpModePEZx or OpModePPZx to Quadrilateral , to choose particular measuring loop in a zone to
work as quadrilateral distance protection.
All ZMFPDIS zones operate according to the non-directional impedance characteristics presented
in figure 151 and figure 150. The phase-to-ground characteristic is given in ohms-per-loop domain
while the phase-to-phase characteristic is given in ohms-per-phase domain.
j
R1PP RFPP
X1PP
X1PP
RFPPR1PP
RFPP
RFPP
RFPP
RFPP
R
X
(Ohm/phase)
(Ohm/phase)
IEC11000416-1-en.vsd
j
0 1
3
X PE X RVPE
XNRV
-
=
0 1
3
X PE X FWPE
XNFW
-
=
0 1
3
X PG X FWPG
XNFW
-
=
0 1
3
X PG X RVPG
XNRV
-
=
0 1
3
X PE X RVPE
XNRV
-
=
0 1
3
X PE X FWPE
XNFW
-
=
2
2
2
2
2
2
IEC11000416 V1 EN-US
Figure 150: ZMFPDIS Characteristic for phase-to-phase measuring
Section 7 1MRK 502 066-UUS B
Impedance protection
306
Technical manual