GE MiCOM P40 Agile Technical Manual page 453

Commissioning
MiCOM P40 Agile P442, P444
Fault simulation
Where:
Uαβ
I1
ϕ1
Rfault = R loop
For a three-phase fault:
Fault simulation
Where:
V1
I1
ϕ1
Note:
For more detail refer to section: Test tools: "Z graph user"
αβ
U
= 2 x Zd + Rfault
I 1
: phase-to-phase fault voltage
: fault current
: fault angle
V 1 Rfault
= +
Zd
I 1 2
: phase-to-phase fault voltage
: fault current
: fault angle
Using the Z graph a Rio format characteristic can be created. This Rio file can be
loaded onto a numerical injector that accepts this kind of files. The active settings
(distance elements) can be modified by Z-graph and the relay can be upgraded with
new distance parameters
P44x/EN CM/Hb6
(CM) 9-29