P54x/EN OP/La4 Operation
(OP) 5-8
MiCOM P543, P544, P545 & P546
OP
6. P544/P546 CIRCUIT BREAKER CONTROL AND AUTO-RECLOSE
FIGURES (AR FIGURES) 207
7. P544/P546 CIRCUIT BREAKER CONTROL AND AUTO-RECLOSE LOGIC:
INTERNAL SIGNAL DEFIN ITIONS 263
FIGURES
Figure 1
Relay bias characteristic 13
Figure 2
Differential logic diagram 14
Figure 3
Propagation delay measurement 15
Figure 4
Example of switched synchronous digital hierarchy 17
Figure 5
Data transmission 18
Figure 6
Capacitive charging current 19
Figure 7
Transformer magnetizing characteristic 21
Figure 8
Magnetizing inrush waveforms 22
Figure 9
Need for zero-sequence current filtering 23
Figure 10
Breaker and a half application 24
Figure 11
Stub bus protection 25
Figure 12
Trip conversion scheme logic 27
Figure 13
Pole dead logic for P543/P545 28
Figure 14
Pole dead logic for P544/P546 29
Figure 15
Phase fault Mho characteristics (Distance option only) 30
Figure 16
Earth fault quadrilateral characteristics (Distance option only) 31
Figure 17
Phase to phase currents showing change for CN fault 33
Figure 18
Expansion of zone 1 for the default polarizing setting Vpol=1 (Distance option only) 34
Figure 19
Quadrilateral characteristics (directional line shown simplified) (Distance option only) 36
Figure 20
Offset quadrilateral for zone 3 (Distance option only) 37
Figure 21
Reactance line - top line of quadrilateral (Distance option only) 37
Figure 22
Resistive reach line (load blinder) (Distance option only) 39
Figure 23
Load blinder characteristics (Distance option only) 43
Figure 24
Basic scheme delayed trip (Distance option only) 44
Figure 25
Power swing detected for 3 cycles continuous
I (Distance option only) 45
Figure 26
Power swing blocking (Distance option only) 47
Figure 27
Out of step detection characteristic (Distance option only) 48
Figure 28
Out of step algorithm (Distance option only) 50
Figure 29
Trip on close (Distance option only) 51
Figure 30
Trip on close based on CNV level detectors (Distance option only) 52
Figure 31
Sequence networks connection for an internal A-N fault (Distance option only) 56
Figure 32
Aided scheme logic overview (Distance option only) 59
Figure 33
Send logic (Distance option only) 60
Figure 34
Receive logic (Distance option only) 60
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