ABB REQ650 Applications Manual page 153

1MRK 505 291-UEN A
Application manual
IEC06000440 V1 EN
Figure 70: Overpower mode
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 54.
Minimum recommended setting is 1.0% of S
minimum IED pickup current shall be at least 9 mA secondary.
= × ×
S 3 UBase IBase
N
EQUATION1708 V1 EN
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
in 50Hz network while -179.5° should be used for generator reverse power protection
in 60Hz network. This angle adjustment in 60Hz networks will improve accuracy of
the power function.
Q
Operate
Power1(2)
Angle1(2)
. Note also that at the same time the
N
Section 6
Current protection
P
en06000440.vsd
(Equation 54)
147