Angl - Impedance Phase Angle - Voltech AT5600 User Manual

C H A P T E R 7 – T E S T S
7.24. ANGL – Impedance Phase Angle
Where Used
The impedance phase angle test measures the angle ∅ of the impedance vector
Z, as shown in the diagram.
It represents the phase difference between the fundamental current flowing
through a winding and the fundamental voltage across it.
This test is normally used for audio and telecommunication transformers along
with the Z test to check the complex impedance presented to the transformers
input and output.
Measurement Conditions
To perform the test, an AC voltage is applied across the winding under
examination, and the complex impedance is calculated by measuring the test
voltage and the resulting current.
Before setting the test voltage or current, it is important to determine the expected
impedance of the winding at the test frequency.
Use the table below to select the appropriate test voltage or current. Locate the
correct impedance range for your winding, and then refer to the corresponding
test voltage or current value.
Keep in mind that inductive components will produce a positive phase angle,
while capacitive components will yield a negative phase angle.
AT5600 User Manual 98-119 issue 30
A N D T E S T C O N D I T I O N S
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