2.21 ANGL - Impedance Phase Angle
Where Used
The impedance phase angle test measures the angle ? of the impedance vector
Z, as shown in the phasor 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
The impedance phase angle test measures the angle of the impedance
vector Z, as shown in the phasor 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
An AC voltage is applied across the winding under test, the complex
impedance is determined from measurement of the test voltage and current
flowing. To set the test voltage or current you will need to know the
expected impedance of the winding at the test frequency. You can measure
this using the Z (Impedance) test.
Select the test voltage or current from the table below; find the correct
impedance range for your winding and read off the test voltage or current
| Impedance Range |
Test Voltage |
Test Current |
1MO ? 100kO
100kO ? 10kO
10kO ? 1kO
1kO ? 100O
100O ? 10O
10O ? 1O
1O ?
100mO ? 10mO
10mO ? 1mO |
5V
5V
5V
3V
0.5V
100mV
10mV
1mV
- |
-
30?A
300?A
3mA
10mA
50mA
50mA
50mA
50mA |