ABB RELION 670 SERIES REG670 Applications Manual page 317

Generator protection
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1MRK 502 071-UUS A
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Application manual
DirSuperv: The directional restrain characteristic allows impedance setting with
positive X value without the risk of unwanted operation of the under-excitation
function. To enable the directional restrain option the parameter DirSuperv shall be set
Enabled.
XoffsetDirLine, DirAngle: The settings XoffsetDirLine and DirAngle are shown in
figure 153. XoffsetDirLine is set in % of the base impedance according to
equation 164.
XoffsetDirLine is given a positive value if X > 0. DirAngle is set in degrees with
th
negative value in the 4
- XoffsetDirLine
IEC06000461 V2 EN-US
Figure 153:
The settings XoffsetDirLine and DirAngle
quadrant. Typical value is -13°.
X
Underexcitation Protection
Restrain area
DirAngle
Section 8
Impedance protection
R
en06000461-2.vsd
311

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