Voltech ATi User Manual page 304

T T
ESTS AND EST
winding used for inductance and Q as the reference winding. The test TRL –
Turns Ratio by Inductance – can provide improved measurement accuracy in
cases where the coupling between windings is poor.
C – Interwinding Capacitance
A capacitance test between windings can check for insulation thickness
between them and for their correct placement along the length of the bobbin.
This can be important not just for confirming the insulation, but to check that
unwanted signal (noise) are not unexpectedly coupled in the final application.
Check the main primary-to-secondary capacitance and between secondaries,
where insulation is important.
LL – Leakage Inductance
The leakage inductance is a measure of how good the magnetic coupling
between windings is. A higher than expected leakage inductance can indicate
inaccurately aligned core halves or poor layering of the windings. Check
between the primary and the secondaries. (The ATi automatically creates
short-circuits across the secondary windings that you specify for this test).
IR – Insulation Resistance
An insulation resistance test applies a high voltage (up to 500V DC) between
windings to check that they are no defects in the insulation. Check wherever
windings are supposed to be insulated from one another.
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V AT U
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