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

P543i/P545i
10.6 SECOND HARMONIC BLOCKING LOGIC
Phase A 2 harmonic
nd
threshold reached
Phase B 2 nd harmonic
threshold reached
nd
Phase C 2 harmonic
threshold reached
Inrush Restraint
Blocking
Ih(2) CrossBlock
Enabled
Ih(2) Rem1 Cross Blk*
Ih(2) Rem2 Cross Blk*
Ih(2) Rem1 Blk A*
Ih(2) Rem2 Blk A*
Ih(2) Rem1 Blk B*
Ih(2) Rem2 Blk B*
Ih(2 ) Rem1 Blk C*
Ih(2 ) Rem2 Blk C*
V02618

Figure 44: Second Harmonic Blocking logic

P54x1i-TM-EN-1
&
&
&
1
&
1
1
1
1
Chapter 6 - Current Differential Protection
1
1
Ih(2) Loc Blk A
Ih(2) Loc Blk A**
Ih(2) Loc Blk B
Ih(2) Loc Blk B**
Ih(2) Loc Blk C
Ih(2) Loc Blk C**
Ih (2) Loc Cross Blk**
Ih(2) Blk A
Ih(2) Blk B
1
Ih(2) Blk C
Ih(2) Rem Blk A
Ih(2) Rem Blk B
Ih(2) Rem Blk C
* Internal signal sent in message
** External signal sent in message
121