What is the procedure for open circuit testing of transformers?

The procedure for the open circuit test of transformers involves specific steps to measure the transformer’s parameters when it is not connected to any load. First, ensure that the transformer is disconnected from any load, and the primary winding is connected to the rated voltage supply. It’s essential to measure the primary current, voltage, and power input at this stage. Then, record the voltage, current, and wattage readings from the supply. These measurements help determine the core losses and magnetizing current of the transformer. Using Globecore’s testers, you can effectively analyze these parameters, ensuring precise diagnostics of the transformer’s health. After completing the measurements, calculate the no-load loss or core loss and magnetizing reactance based on the readings. This open circuit test of transformers provides valuable insights into their operational efficiency and performance, facilitating effective maintenance and monitoring.