ABB REC670 Applications Manual page 224

Section 8
Current protection
218
Operate
IEC06000441 V1 EN-US
Figure 87: 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 73.
Minimum recommended setting is 0.2% of S
IED are used.
= × ×
S 3 VBase IBase
N
EQUATION2047 V1 EN-US
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)
when metering class CT inputs into the
N
1MRK 511 401-UUS A
P
en06000441.vsd
Bay control REC670 2.2 ANSI
Application manual
(Equation 73)