which test is used to determine the magnetizing impedance of a transformer?

The test used to determine the magnetizing impedance of a transformer is the open-circuit test, also known as the no-load test. During this test, the primary winding of the transformer is connected to the rated voltage while the secondary winding is left open. This allows for the measurement of the no-load current and the no-load losses, from which the magnetizing impedance can be calculated. This impedance reflects the transformer’s ability to magnetize its core.