Vanguard EZCT-S2A - Manual (Page 94)

EZCT S2A USER’S MANUAL REV 1
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Figure 21 show a CT mounted on a typical shunt reactor. This configuration is very similar to
the CT mounted on a single phase transformer, the main difference being the lack of the
secondary winding! The turns-ratio in this case will be:
Ratio=
( )
Figure 21
Since there is no secondary winding on the shunt reactor, the turns-ratio measurement from
using this method will always have some built-in error. The amount of error depends on the
size of the reactor winding and the number of turns on the CT's secondary winding. The user
does not have an alternative method for verifying the CT turns-ratio in this situation since there
is no secondary winding and a jumper can't be used.