How do you test a furnace transformer?

To effectively test a furnace transformer, start by performing insulation resistance tests using a megohmmeter to ensure the insulation integrity of the windings. Next, utilize a turn ratio tester to confirm the transformer turns ratio, ensuring it matches the specified values. Additionally, it’s essential to conduct a power factor test, which can be performed using a power factor tester to evaluate the dielectric loss characteristics of the insulation. For detailed diagnostics, leverage an oil tester to assess the condition of the insulation oil, which can provide insights into moisture content and other contaminants. Finally, check for any signs of physical damage, overheating, or unusual sounds during operation. Regular testing of transformers, especially in industrial settings, ensures reliability and longevity, making these procedures crucial. Remember that testing a transformer regularly helps prevent unexpected failures and ensures efficient operation.