ISA T 2000 - Tests: PT Ratio Test

DOC. MIE11110 Rev. 5
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5. Same LTC as above; fault on this selection.
1.3.4 PT tests: PT ratio test
• Connect low V to the transformer HV side phase 1 and 2.
• Adjust the voltage of V1 to 100 V.
• Connect the measuring input Ext V (the 600 V or the 10 V
input, as a function of the transformer ratio) between one
phase and ground. You will find that two outputs have half