As of my last update in September 2021, there is no specific test known as a "transformer short-circuit test" that determines impedance values. However, it's possible that developments or changes have occurred beyond my last update. I will provide an explanation of the typical transformer impedance tests used in the power industry, which might be relevant to your inquiry.
Open-Circuit Test: In this test, the secondary winding of the transformer is left open, and a reduced voltage (typically rated voltage or lower) is applied to the primary winding. The primary current, exciting current, and losses are measured. From the test results, the core losses and exciting current can be determined. The core loss resistance is used to calculate the magnetizing reactance, which is then used to determine the magnetizing impedance.
Short-Circuit Test: In this test, the secondary winding of the transformer is short-circuited, and rated or reduced voltage is applied to the primary winding. The primary current, short-circuit current, and losses are measured. The test helps determine the resistance and leakage reactance components of the transformer impedance.
The impedance values of the transformer can be calculated using the results from these tests. The total impedance of the transformer can be expressed as:
Impedance (Z) = Voltage (V) / Short-circuit Current (I)
Where V is the voltage applied during the short-circuit test and I is the measured short-circuit current. The calculated impedance will have both resistive and reactive components, representing the inherent losses and reactance of the transformer.
These tests are crucial for understanding the performance and efficiency of the transformer and are used in transformer design, manufacturing, and maintenance. It's important to note that different standards or industries might use specific terminologies, so it's possible that the term "transformer short-circuit test" has a different meaning or application in a particular context.