2.15 Monitoring Functions
209
7SD610 Manual
C53000-G1176-C145-4
Figure 2-88 Phase Angle Monitoring for Negative Active Power
The two angles must be at least 3° apart; if this is not the case, 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 I
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).
Figure 2-89 shows the logic of the positive sequence system phase angle monitoring.
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