Short Circuit Test on a Transformer
Short circuit test is performed on a transformer to determine its impedance and losses under short circuit conditions. When the short circuit test is conducted, the low voltage side of the transformer is to be short circuited.

Reason for Short Circuiting Low Voltage Side
- The low voltage side of the transformer is short circuited because the primary winding on this side has fewer turns compared to the high voltage side. This means that the current flowing through the primary winding is higher, leading to a more significant short circuit current.
- Short circuiting the low voltage side allows for a more accurate measurement of the impedance and losses of the transformer under short circuit conditions.
- The short circuit test helps in determining the equivalent circuit parameters of the transformer, such as the resistance and reactance of the windings. These parameters are crucial in understanding the performance of the transformer under different operating conditions.

Impact of Short Circuit Test
- Performing the short circuit test on the low voltage side helps in assessing the transformer's ability to withstand short circuit conditions and ensures its reliability and safety.
- The test also helps in determining the efficiency of the transformer and identifying any potential issues that may arise during short circuit events.
In conclusion, short circuit test on a transformer involves short circuiting the low voltage side to accurately measure the impedance and losses of the transformer under short circuit conditions. This test is essential for evaluating the transformer's performance and ensuring its safe operation.