The monitoring function can also be used for the display of negative active power. In this case the areas must
be defined as shown in
.
[wirkleistung-ind-kap--wlk040602, 1, en_GB]
Figure 2-57
Phase Angle Monitoring for Negative Active Power
The two angles must be at least 3° apart; if they are not, monitoring is blocked, and the indication
φ Set
wrong
(No. 132 is output.
The following conditions must be fulfilled for measurement to be enabled:
•
The positive sequence current
Ι
1
is higher than the value set in parameter 2943
I1>
.
•
The positive sequence voltage U
1
is higher than the value set in parameter 2944
U1>
.
•
The angles set in address 2941
φA
and 2942
φB
must be at least 3° apart. Incorrect parameter settings
cause the indication 132
φ Set wrong
to be output.
•
The “Fuse-Failure-Monitor” and the measured voltage failure monitoring must not have responded, and
binary input indication 361
>FAIL:Feeder VT
must not be present.
If monitoring is not active, this fact is signaled by the indication
φ(PQ Pos) block
(No. 131).
shows the logic of the positive sequence system phase angle monitoring.
Functions
2.7 Monitoring Functions
SIPROTEC 4, 7VK61, Manual
139
C53000-G1176-C159-5, Edition 05.2018
Summary of Contents for SIPROTEC 4 7VK61
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