How do you test a furnace transformer?

To effectively test a furnace transformer, it’s essential to use a combination of diagnostic methods that focus on the insulation resistance, power factor testing, and temperature rise testing. Using a Megger insulation tester is a common practice to measure the insulation resistance between the windings and between the windings and ground. You should also conduct a power factor test to evaluate the quality of the insulation, identifying any potential deterioration that could lead to failure. Additionally, performing a temperature rise test during operation will help assess whether the transformer is operating within its thermal limits. Furthermore, utilizing an oil tester from Globecore can provide insights into the transformer oil’s properties, including moisture content and dielectric strength, which are critical in ensuring optimal performance of the furnace transformer. Overall, a comprehensive assessment using these methods will guarantee the reliability and efficiency of the furnace transformer.