ABB REC670 Applications Manual page 231

1MRK 511 401-UUS A
Bay control REC670 2.2 ANSI
Application manual
Operate
IEC06000557 V2 EN-US
Figure 91: For reverse power the set angle should be 180° in the overpower
function
TripDelay1(2) is set in seconds to give the time delay for trip of the stage after pick up.
Hysteresis1(2) is given in p.u. of generator rated power according to equation 87.
= × ×
S 3 VBase IBase
N
EQUATION2047 V1 EN-US
The drop out power will be Power1(2) - Hysteresis1(2).
The possibility to have low pass filtering of the measured power can be made as shown
in the formula:
Q
Angle1(2 ) = 180
Power 1(2)
IEC06000557-2-en.vsd
Section 8
Current protection
o
P
(Equation 87)
225