ABB RELION 670 Series Applications Manual page 152

Section 8
Current protection
Set value
A
B
C
The function has two stages that can be set independently.
With the parameter
The function gives trip if the power component in the direction defined by the setting
larger than the set pick up power value
IEC06000440 V1 EN-US
Figure 65: Overpower mode
The setting
setting is given in p.u. of the generator rated power, see equation 77.
Minimum recommended setting is 0.2% of S
146
Mode
OpMode1(2) the function can be set Enabled / Disabled .
Q
Power1(2)
Power1(2) gives the power component pick up value in the Angle1(2) direction. The
Formula used for complex power calculation
*
= × ×
S 3 V I
A A
EQUATION2044 V1 EN-US
*
= × ×
S 3 V I
B B
EQUATION2045 V1 EN-US
*
= × ×
S 3 V I
C
C
EQUATION2046 V1 EN-US
Power1(2)
Operate
Angle1(2)
when metering class CT inputs into the IED are used.
N
1MRK 511 364-UUS A
P
en06000440.vsd
Application manual
(Equation 74)
(Equation 75)
(Equation 76)
Angle1(2) is