Vanguard EZCT-S2A - Manual (Page 78)

EZCT S2A USER’S MANUAL REV 1
74
NOTES
• The CT turns ratio is ideally measured as: Ratio =
Vh
Vx
.
• Since the induced voltage (V) is sensed through the H1-H2 terminals of
the Delta winding, this induced voltage is measured as V = (
3
2
) Vh.
• The CT turns ratio is now measured as Ratio =
V
Vx
or Ratio = (
2
3
)(
Vh
Vx
). This measured turns ratio is
2
3
higher than the actual turns ratio.
• The EZCT S2A will display the correct CT turns ratio by adjusting the
measured turns ratio by
3
2
.