ABB REL650 Applications Manual page 256

Section 7
Current protection
250
Operate
IEC06000441 V1 EN
Figure 121: Underpower 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 162.
Minimum recommended setting is 1.0% of S
current shall be at least 9 mA secondary.
= × ×
S 3 VBase IBase
N
EQUATION2047 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°. 0° should be used for generator low forward active power protection.
Q
Power1(2)
Angle1(2)
. At the same time the minimum IED pickup
N
1MRK 506 334-UUS A
P
en06000441.vsd
(Equation 162)
Application manual