GE MiCOM P40 Agile - Figure 45: Fifth Harmonic Blocking Logic

10.7 FIFTH HARMONIC BLOCKING LOGIC
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Ih(5) Loc Blk A
Phase A 5
th
harmonic
threshold reached
&
Phase B 5
th
harmonic
threshold reached
Phase C 5
th
harmonic
threshold reached
Ih(5) Blocking
Enabled
&
&
1
Ih(5) Loc Blk B
Ih(5) Loc Blk C
&
Ih(5) CrossBlock
Enabled
1
Ih(5) Loc Blk A**
Ih(2) Loc Blk B**
Ih(5) Loc Blk C**
Ih(5) Loc Cross Blk**
1
Ih(5) Blk A
Ih(5) Blk B
Ih(5) Blk C
1
Ih(5) Rem1 Cross Blk*
Ih(5) Rem2 Cross Blk*
1
Ih(5) Rem1 Blk A*
Ih(5) Rem2 Blk A*
1 Ih(5) Rem Blk A
Ih(5) Rem1 Blk B*
Ih(5) Rem2 Blk B*
1
Ih(5) Rem1 Blk C*
Ih(5) Rem2 Blk C*
1
Ih(5) Rem Blk B
Ih(5) Rem Blk B
* Internal signal sent in message
** External signal sent in message
Figure 45: Fifth Harmonic Blocking logic
Chapter 6 - Current Differential Protection P543i/P545i
122 P54x1i-TM-EN-1