ABB RELION 670 Series Applications Manual page 193

1MRK 505 337-UUS A
The function gives trip if the power component in the direction defined by the setting
smaller than the set pick up power value
IEC06000441 V1 EN-US
Figure 93: Underpower mode
The setting
setting is given in p.u. of the generator rated power, see equation 54.
Minimum recommended setting is 0.2% of S
=
S
N
EQUATION2047 V1 EN-US
The setting
protection function. The setting is given in degrees. For active power the set angle should be 0° or
180°. 0° should be used for generator low forward active power protection.
Application manual
Q
Power1(2)
Operate
Power1(2) gives the power component pick up value in the Angle1(2) direction. The
× ×
3 VBase IBase
Angle1(2) gives the characteristic angle giving maximum sensitivity of the power
Power1(2)
Angle1(2)
en06000441.vsd
when metering class CT inputs into the IED are used.
N
Current protection
P
Section 7
Angle1(2) is
(Equation 54)
187