ABB RELION RET670 - Page 589

Operate
Angle1(2)
Power1(2)
P
Q
en06000441.vsd
IEC06000441 V1 EN-US
Figure 285: 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
462.
Minimum recommended setting is 0.2% of S
N
when metering class CT inputs into the
IED are used.
N
S 3 VBase IBase= × ×
EQUATION2047 V1 EN-US (Equation 462)
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.
1MRK 504 163-UUS A Section 9
Current protection
Transformer protection RET670 2.2 ANSI 583
Application manual