Hitachi Relion 670 Series Applications Manual page 156

Section 8
Current protection
IEC06000440 V1 EN-US
Figure 73:
The setting Power1(2) gives the power component pick up value in the Angle1(2) direction. The setting is
given in p.u. of the generator rated power, see equation 81.
Minimum recommended setting is 0.2% of S
=
S 3 VBase IBase
N
EQUATION2047 V1 EN-US
The setting Angle1(2) gives the characteristic angle giving maximum sensitivity of the power protection
function. The setting is given in degrees. For active power the set angle should be 0° or 180°. 180°
should be used for generator reverse power protection.
150
Q
Power1(2)
Angle1(2)
Overpower mode
× ×
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Operate
P
en06000440.vsd
when metering class CT inputs into the IED are used.
N
1MRK511407-UUS Rev. N
(Equation 81)
Phasor measurement unit RES670
Application manual