how many types of transformer testing?

There are several types of transformer testing, 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, assess performance under specific conditions, including temperature rise, short-circuit, and dielectric tests. Additionally, field tests may be performed to evaluate the transformer’s condition during operation.