6. Measurement Setup
6.1 Measurement setup for a typical CT
Figure 8 shows basic measurement setup for a typical multi-ratio CT. Before connecting test cable
clamps, check that CT is isolated completely from power grid and also check that secondary termi-
nals of CT are not short circuited.
After connecting clamps, make sure that clamps connected tightly without loose connection.
90225-1.30 Instruction Manual CT-T1
Page 25 of 62
Figure 8: Example measurement setup of a CT under test with 3 taps for turns ratio measuring. The primary
winding of the CT is connected to the High Current Side of CT-T1 with H-cable and the secondary winding
taps of the CT are connected to the Low Current Side of CT-T1 with X-cables.
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