Vanguard EZCT-S2A - Manual (Page 91)

REV 1 EZCT S2A USER’S MANUAL
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7.0 Appendix A - Calculating Turns Ratio on a Shunt Reactor
The Vanguard EZCT line of products use the voltage method to measure the turns-ratio on
current transformers. A typical connection for a stand-alone CT is shown in Figure 18.
Figure 18
The EZCT applies a test voltage (V1) to the CT secondary winding. The induced voltage (V2) is
sensed through the CT primary winding. In this case a single conductor is used. By definition,
the turns-ratio is the voltage ratio:
Ratio=