Quadrilateral Characteristic - ABB REL650 series Technical Manual

Section 6
Impedance protection
6.1.6.3
100
A-G B-G
A-G B-G
A-G B-G
A-G B-G
A-G B-G
A-G B-G
ANSI05000458 V2 EN
Figure 31: The different measuring loops at phase-to-ground fault and phase-to-
phase fault.
The use of full scheme technique gives faster operation time compared to switched
schemes which mostly uses a pickup of an overreaching element to select correct voltages
and current depending on fault type. Each distance protection zone performs like one
independent distance protection IED with six measuring elements.

Quadrilateral characteristic

ZQMPDIS (21) basically implements quadrilateral and mho characteristic in all the five
zones separately. Set CharPGZx or CharPPZx setting to Quadrilateral, to choose
particular measuring loop in a zone to work as quadrilateral distance protection.
The quadrilateral characteristic measuring loop will essentially operate according to the
non-directional impedance characteristics presented in figure
phase-to-ground characteristic is illustrated with the full loop reach while the phase-to-
phase characteristic presents the per phase reach.
C-G A- B
C-G
A- B
A- B
C-G
C-G A- B
A- B
C-G
C-G A- B
1MRK 506 335-UUS A
Zone 1
B - C C-A
Zone 2
B -C C- A
Zone 3
B-C C -A
Zone 4
B-C C -A
Zone 5
B -C C -A
Zone 6
B - C C-A
ANSI05000458-2-en.vsd
32 and figure 33. The
Technical manual