GE MiCOM P40

Line
Dist
F
Z
Bus
IED
Network
A
B
C
LP
R
Half of the loop
IV
V02725
Figure 50: Resistive reach of phase elements
The setting Rx Ph. Resistive defines the complete loop resistive reach R
LP
of the Distance Protection.
Since a phase-to-phase distance element measures half of the loop, the right-hand resistive reach R, of the
characteristic is equal to half of the setting value.
R = ½ Rx Ph. Resistive
+R
+jX
V02724
Z
V / I - R
V / I
R Ð Z
Figure 51: Resistive Reach line construction
For all V/I vectors which are on the left side of the right blinder the following condition is true:
Ð (V/I - R) £ Z
or
Ð (V - I.R) £ Ð I. Z
The two signals provided to the comparator are:
S
1
= V - I.R
S
2
= I.Z
Chapter 7 - Distance Protection P446SV
128 P446SV-TM-EN-1