M17048-245 v4
C
A
B
BC
ANSI05000224-2-en.vsd
ANSI05000224 V2 EN-US
Figure 131: Example of tapped line with Auto transformer
This application gives rise to similar problem that was highlighted in section
"Fault
infeed from remote end" , that is increased measured impedance due to fault current
infeed. For example, for faults between the T point and B station the measured
impedance at A and C will be
DOCUMENT11524-IMG3509 V3 EN-US (Equation 132)
A C
2
C Trf CT TB
C
I I V2
Z Z (Z Z ) ( )
V1
I
+
= + + × ×
EQUATION1714 V1 EN-US (Equation 133)
1MRK 504 163-UUS A Section 8
Impedance protection
Transformer protection RET670 2.2 ANSI 273
Application manual
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