Open Circuit Test of Transformer Practically Explained in Hindi/Urdu In this video, I practically explain the open circuit test of a transformer. The open circuit test is an essential procedure used to measure the core losses (iron losses) of a transformer. Many types of tests are performed on transformers in factories or industries, including: Short circuit test Polarity test Back-to-back test Winding test, and more. This video covers the open circuit test procedure, its importance, and the cal