ABB RES670 Applications Manual page 169

1MRK 511 407-UEN C
Phasor measurement unit RES670 2.2 IEC
Application manual
Set value Mode
L3L1
L1
L2
L3
The function has two stages that can be set independently.
With the parameter OpMode1(2) the function can be set On/Off.
The function gives trip if the power component in the direction defined by the
setting Angle1(2) is smaller than the set pick up power value Power1(2)
Operate
IEC06000441 V1 EN-US
Figure 66: 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 65.
Formula used for complex power calculation
=
S U
L L 3 1
EQUATION1702 V1 EN-US
= ×
S 3 U
EQUATION1703 V1 EN-US
= ×
S 3 U
EQUATION1704 V1 EN-US
= ×
S 3 U
EQUATION1705 V1 EN-US
Q
Power1(2)
Angle1(2)
Section 8
Current protection
* *
× -
( I I )
L 3 L 1
(Equation 61)
*
×
I
L 1 L 1
(Equation 62)
*
×
I
L 2 L 2
(Equation 63)
*
×
I
L 3 L 3
(Equation 64)
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