GE MiCOM P40 Agile - Figure 44: Second Harmonic Blocking Logic

10.6 SECOND HARMONIC BLOCKING LOGIC
V02618
Ih(2) Loc Blk A
Phase A 2
nd
harmonic
threshold reached
&
Phase B 2
nd
harmonic
threshold reached
Phase C 2
nd
harmonic
threshold reached
Inrush Restraint
Blocking
&
&
1
Ih(2) Loc Blk B
Ih(2) Loc Blk C
&
Ih(2) CrossBlock
Enabled
1
Ih(2) Loc Blk A**
Ih(2) Loc Blk B**
Ih(2) Loc Blk C**
Ih(2) Loc Cross Blk**
1
Ih(2) Blk A
Ih(2) Blk B
Ih(2) Blk C
1
Ih(2) Rem1 Cross Blk*
Ih(2) Rem2 Cross Blk*
1
Ih(2) Rem1 Blk A*
Ih(2) Rem2 Blk A*
1 Ih(2) Rem Blk A
Ih(2) Rem1 Blk B*
Ih(2) Rem2 Blk B*
1
Ih(2) Rem1 Blk C*
Ih(2) Rem2 Blk C*
1
Ih(2) Rem Blk B
Ih(2) Rem Blk C
* Internal signal sent in message
** External signal sent in message
Figure 44: Second Harmonic Blocking logic
P543i/P545i Chapter 6 - Current Differential Protection
P54x1i-TM-EN-1 121