ABB Relion 670 series - Setting Guidelines; Scheme Communication and Tripping for Faults Occurring During Power Swinging over the Protected Line

R
jX
B
A
Measured
impedance at initital
fault position
Impedance locus at initial power
swing after the fault clearance
ZMRPSB operating characteristic
Zone 2
Zone 1
IEC99000181_2_en.vsd
IEC99000181 V2 EN
Figure 229: Impedance trajectory within the distance protection zones 1 and 2 during
and after the fault on line B – D
8.15.3 Setting guidelines
8.15.3.1 Scheme communication and tripping for faults occurring during power
swinging over the protected line
The IED includes generally up to five distance protection zones. It is possible to use one
or two of them intentionally for selective fault clearing during power swings only.
Following are the basic conditions for the operation of the so called (underreaching and
overreaching) power-swing zones:
Section 8 1MRK 506 369-UUS -
Impedance protection
446 Line distance protection REL670 2.2 ANSI
Application manual