ABB REG670 - Operating Zones

8.9.2.1 Operating zones
ImpedanceAn
g
ImpedanceAn
g
ImpedanceAn
g
Z2Fwd
Z3Fwd
Z1Fwd
Z3Rev
Z2Rev
Z1Rev
R(ohm)
X(ohm)
B) Typical setting of zones for under
impedance relay
IEC11000308-3-en.vsd
Zone3
Zone1
REG670
A) Power system model
Zone2
Y/Y
D/Y
IEC11000308 V3 EN
Figure 165: Zone characteristics and typical power system model
Section 8 1MRK 502 071-UEN -
Impedance protection
310 Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Application manual