What are the tests conducted on transformers?

These tests include winding insulation resistance test, winding resistance test, vector group test, tan delta test, no-load test or iron losses, load test or copper losses, temperature rise test, partial discharge test, frequency response analysis test, and transformer oil breakdown test.

Why maintenance of transformer is required?

A power transformer maintenance and testing program includes the following benefits: Increased safety, problems are detected before they are a hazard. Increased equipment efficiency, conditions related to transformer losses can be corrected. Reduced expenses, repair work can be properly scheduled.

Why polarity test is necessary for a transformer?

We do polarity test on parallel transformers to ensure that we connect the same polarity windings and not the opposite ones. If we accidentally connect the opposite polarities of the windings, it will result in a short-circuit and eventually damage the machine.

How often should transformers be tested?

Your electrical transformer needs to be checked every 6 months for IFT, DDA, flash point, sludge content, acidity, water content and dielectric strength along with how resistant it is to transformer oil.

How often should transformers be inspected?

Every three to five years, examine the top of the transformer device around the pressure relief tank to ensure there are no leaks.

What is the purpose of insulation resistance test?

An insulation resistance (IR) test measures the total resistance between any two points separated by electrical insulation. The test, therefore, determines how effective the dielectric (insulation) is in resisting the flow of electrical current.

What are the maintenance checks required by a transformer?

Transformer Maintenance on a Half Yearly Basis Your electrical transformer needs to be checked every 6 months for IFT, DDA, flash point, sludge content, acidity, water content and dielectric strength along with how resistant it is to transformer oil.