Micom P721, Technical Manual

Page: 104 / 334

P72x/EN TD/A11 Technical Data
Page 14/18 MiCOM P721/P723
10.8.2 Available logical gates
Logical gates Availability (1/2)
NOT A00
B00
C00
D00
E00
F00
G00
H00
OR (by default)
AND
AND NOT
OR NOT
A01 to A15
B01 to B15
C01 to C15
D01 to D15
E01 to E15
F01 to F15
G01 to G15
H01 to H15
10.8.3 Available signals
With the Logic Equations submenu, 16 operands can be used in any single equation. The
following logic signals are available for mapping to an equation:
TEXT Signals (2/2)
P721 and P723:
Null Condition is Null
Not Null Condition is not Null
[87N] Diff Earth differential protection threshold
[87N] tDiff Time delayed earth differential protection threshold
[95N] tSup Time delayed earth high impedance differential threshold
(buswire supervision)
tAux 1 Copy of the status of the Logic Input tAux 1
tAux 2 Copy of the status of the Logic Input tAux 2
Input 1 Instantaneous digital input 1
Input 2 Instantaneous digital input 2
Group 2 Group 2 is active (setting)
CB Fail Circuit Breaker does not operate
P723 only:
[87] Diff Phase differential protection threshold
[87] tDiff Time delayed phase differential protection threshold
[87CZ] Check zone Check Zone status
[95] Sup Phase high impedance differential threshold (buswire
supervision)
[95N] Sup Earth high impedance differential threshold (buswire
supervision)
[95] tSup Time delayed phase high impedance differential threshold
(buswire supervision)