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Electrical and electronic components

Diagnostic testing of cast resin transformers

By OMICRON electronics UK on 11th February 2019

Product Details Supplier Info More products

Because of the flammable nature of the mineral oil used in oil-filled transformers and the risk of oil spillage and ground contamination, cast resin dry-type transformers are alternatively used in locations where fire and environmental safety are important. These include for example buildings, industrial sites and groundwater protection areas.

The most common reason for failures of cast resin transformers is the electric breakdown of the insulation between turns or parts of the windings. In many cases, partial discharges (PD) occur before the breakdown happens and are therefore a measurable indication of a developing problem.

Our paper of the month describes how testing the windings of cast resin transformers with induced voltage in combination with a sensitive PD measurement can minimize the risk of unforeseen outages. Methods for performing these on-site tests with portable equipment are discussed based on case studies.

Enjoy reading and watch out for our paper of the month regularly!

Download the paper

OMICRON electronics UK

OMICRON is an international company serving the electrical power industry with innovative testing and diagnostic solutions.

Visit our website 01785 251 000

OMICRON is an international company serving the electrical power industry with innovative testing and diagnostic solutions. The application of OMICRON products allows users to assess the condition of the primary and secondary equipment on their systems with complete confidence. Services offered in the area of consulting, commissioning, testing, diagnosis and training make the product range complete.

Customers in more than 150 countries rely on the company’s ability to supply leading edge technology of excellent quality. Service centers on all continents provide a broad base of knowledge and extraordinary customer support. All of this together with our strong network of sales partners is what has made our company a market leader in the electrical power industry.

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Mark Allen Engineering Limited
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