ABB REL650 series, Applications Manual, Page: 256 / 516

Operate
Angle1(2)
Power1(2)
P
Q
en06000441.vsd
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
N
. At the same time the minimum IED pickup
current shall be at least 9 mA secondary.
N
S 3 VBase IBase
= × ×
EQUATION2047 V1 EN
(Equation 162)
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.
Section 7
1MRK 506 334-UUS A
Current protection
250
Application manual