GE P4A Technical Manual page 131

P54A/B/C/E
T Z
phase (
=
C
T is the propagation time delay of traveling waves from one terminal to another;
p
−
T phase e
(
=
p
K is the gain factor made by propagation attenuation;
p
yl
−
K abs ( e
=
p
P54xMED-TM-EN-1
f
) / ( 2 )
π
C
0
yl
f
) / ( 2 )
π
0
)
Chapter 6 - Current Differential Protection
105