ISA T 2000 - Current Transformer Tests; CT Tests: Ratio, Polarity Voltage Mode

DOC. MIE11110 Rev. 5
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The following paragraphs detail the operations following these
selections.
1.1 CURRENT TRANSFORMER TESTS
When this selection is performed, the following screen is displayed.
It is possible to select the tap number: this selection is reported in
the available tests.
1 .1.1. CT tests : ratio, polarity voltage mode
When this test is selected, the following menu is displayed.
Purpose of the test is to measure the actual CT ratio and to verify
its polarity. This test is called voltage mode because these
parameters are verified by connecting the main AC voltage output
(high or low) to the CT secondary, and measuring the
corresponding voltage at the primary side. These parameters could