ABB RELION 670 SERIES Applications Manual page 565

1MRK 506 369-UUS -
Line distance protection REL670 2.2 ANSI
Application manual
Operate
IEC06000557 V2 EN
Figure 287: 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 508.
= × ×
S 3 VBase IBase
N
EQUATION2047 V1 EN
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 9
Current protection
o
P
(Equation 508)
559