ABB REB670 Series Applications Manual page 200

Section 7
Current protection
IEC06000441 V1 EN-US
Figure 108: Underpower mode
The setting
setting is given in p.u. of the generator rated power, see equation 53.
Minimum recommended setting is 0.2% of S
used.
=
S
N
EQUATION1708 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.
194
Q
Power1(2)
Operate
Power1(2) gives the power component pick up value in the Angle1(2) direction. The
× ×
3 UBase IBase
Angle1(2) gives the characteristic angle giving maximum sensitivity of the power
Angle1(2)
en06000441.vsd
when metering class CT inputs into the IED are
N
1MRK 505 370-UEN D
P
(Equation 53)
Busbar protection REB670
Application manual