ABB Relion REQ650, Руководство по применению

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Set value Mode Formula used for complex power calculation
L1
*
1 1
3
L L
S U I
= × ×
EQUATION1703 V1 EN
(Equation 62)
L2
*
2 2
3
L L
S U I
= × ×
EQUATION1704 V1 EN
(Equation 63)
L3
*
3 3
3
L L
S U I
= × ×
EQUATION1705 V1 EN
(Equation 64)
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
Angle1(2)
Power1(2)
P
Q
en06000441.vsd
IEC06000441 V1 EN
Figure 72: 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 .
Minimum recommended setting is 1.0% of S
N
. At the same time the minimum IED
pickup current shall be at least 9 mA secondary.
Section 6
1MRK 505 291-UEN A
Current protection
150
Application manual