ABB Relion 670 Series REL670 - Page 158

Operate area
ROADir
IEC06000650_2_en.vsd
=
o
0RCADir
0
3I
j
0
3 × jI cos
- =
0
3
ref
U U
IEC06000650 V2 EN
Figure 34: Characteristic with ROADir restriction
Section 10 1MRK 506 355-UEN A
Testing functionality by secondary injection
152 Line distance protection REL670 2.1 IEC
Commissioning manual