ABB Relion 670 Series Applications Manual page 201

1MRK 511 401-UUS F
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
smaller than the set pick up power value
IEC06000441 V1 EN-US
Figure 91: Underpower mode
The setting
setting is given in p.u. of the generator rated power, see equation 78.
Minimum recommended setting is 0.2% of S
Bay control REC670
Application manual
Mode
OpMode1(2) the function can be set Enabled / Disabled .
Q
Power1(2)
Operate
Power1(2) gives the power component pick up value in the Angle1(2) direction. The
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Formula used for complex power calculation
*
= × ×
S 3 V I
A A
EQUATION2061-ANSI V1 EN-US
*
= × ×
S 3 V I
B B
EQUATION2062-ANSI V1 EN-US
*
= × ×
S 3 V I
C C
EQUATION2063-ANSI V1 EN-US
Power1(2)
Angle1(2)
en06000441.vsd
when metering class CT inputs into the IED are used.
N
Current protection
(Equation 75)
(Equation 76)
(Equation 77)
P
Section 8
Angle1(2) is
195