Current Transformer
4 - 3
CT Ratio (and Burden)
Testing Ratio, Polarity (and Burden) with Injection to
Current Input
Use the CTRatio test card to measure a current transformer’s ratio and burden
with injection on the CT’s primary side with up to 800 A from the 800A ACoutput
or up to 2000 A using the CP CB2 current booster connected to the "EXT.
BOOSTER" output.
It measures amplitude and phase angle of the current (at IAC) and voltage
(at V1AC) on the transformer’s secondary side, and calculates the actual ratio
and the deviation from the nominal ratio.
Figure 2:
Setup of testing ratio,
polarity (and burden)
with injection to current
input