ISA T 2000 - Page 40

DOC. MIE11110 Rev. 5
Page
40
of
110
The test voltage to be reached during the test is at least 2*VSM,
so that the saturation knee is well designed.
Then, select the voltage input range as a function of the test
voltage and of the CT ratio.
Given:
. KCT = CT ratio;
. VP = voltage at primary,
Then, compute:
VP = VSM / (2 * KCT)
The connection diagram is the following.