how many type of transformer test?

There are several types of transformer tests, primarily categorized into two groups: routine tests and type tests. Routine tests include insulation resistance, transformer turns ratio, and power factor tests, which ensure the transformer operates correctly before installation. Type tests, conducted on a sample unit, include short-circuit, open-circuit, and temperature rise tests to verify performance under specified conditions. Additionally, field tests may be performed to assess the transformer’s condition during operation.