ABB Relion 670 series - Page 558

Operate
Angle1(2)
Power1(2)
P
Q
en06000441.vsd
IEC06000441 V1 EN
Figure 283: 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
494.
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
(Equation 494)
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 9 1MRK 506 369-UUS -
Current protection
552 Line distance protection REL670 2.2 ANSI
Application manual