Transformers that increase or reduce electrical voltage are used for many public utility, industrial, and other applications. Wherever they are used, comprehensive transformer testing needs to occur before installation to make sure the transformer will serve the electrical, thermal, and mechanical needs of the system. At Electric Power Systems, we can help with this process. Some of the common types of transformer testing we perform include:
- Turns ratio testing—During this test, we make sure the ratio between the coils and the windings is within the proper specifications. This is an incredibly important test because it confirms that the transformer will provide the proper step-down or step-up in voltage.
- Insulation resistance testing—Often referred to as the Megger test, insulation resistance testing looks at the quality of the insulation inside of the transformer. In most cases, we use a megohmmeter, a tool with similarities to a multi-meter, to run this test.
- Power testing—We determine the power loss that occurs within the transformer’s insulation system during the power test. To do this, we measure the power angle between the resultant current and an applied AC voltage.
- Resistance testing—We perform this test a few hours after the transformer stops conducting current, so it can reach the same temperature as the surrounding area. We do this test to look for differences in resistance between the openings in the connections and the windings, which ultimately ensures all the connections are tight.
To schedule transformer testing at your site, contact us at Electric Power Systems! We guarantee exceptional service backed by experience.