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Short-Circuit Impedance Tab

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To perform a short-circuit impedance test, as can be seen in the picture, the primary winding is short-circuited.

3
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AC current injection is done through the secondary coil and the voltage difference that happens on the terminals,

4
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is measured through the inputs of the device.

5
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This measurement must be repeated for the other secondary coils.

6
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The obtained impedance called Zsc_x is a combination of primary and secondary stray losses.

7
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Where RP”, Xp” and x stand for the resistance of the primary winding which is transferred to the secondary side,

8
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the leakage reactance of the primary winding which is referred to the secondary side,

9
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and the indicator which is considered for the secondary winding or in other words for where the current is injected from, respectively.

10
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Performing the test and anlyizng the results

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To perform this test, first, 1 is entered as the amount of the injected current in I test field and 1 is entered as the test time in State Time.

12
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By pressing Insert Rows button, it is possible to create other rows for testing other coils.

13
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After adjusting these settings, the wiring must be done according to this picture.

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In this picture, first phase of current groups A and B are made series so that the maximum Burden of the device is used.

15
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Then, the outputs of the device are connected to the CVT.

16
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To measure the caused voltage difference, input number 1 must be used.

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It should be noted that, in this wiring the voltage connectors are connected ahead of the connectors of current injection.

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Finally, to perform the test, by right-clicking on any of the rows in Table section and selecting Apply Test,

19
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the test is run and the resistance value of the intended coil is measured.

20
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After the test is finished, to add the results to the report “Add to Report” button can be used.

21
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Also, by using the cog next to this button, you can remove the items they do not wish to be added to the report before selecting “Add to Report” option.

22
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if you, for any reason, wish to modify the wiring of the device, first they need to apply the test

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once and then check “Don’t Change Hardware Setting” option and select a different output from “Hardware Configuration”

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window and then set the Output Target at “IL1-E” and run the test after changing the wiring.

25
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To select other inputs, it should be noted that the selected Binary Input Target must be in accordance with the default “Binary Input Target”.

26
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For this, it is suggested to right-click on “Input1” row and “Cut” the information and “Paste” it in the intended row.