Who Are We?

A Team of Full-service Analyzer Professionals for Transformer Your Needs

Welcome to Annalytical VIETNAM

We are more than 20 years in the field of analysis and providing solutions for transformer oil testing and diagnostics, we understand our customers and bring the lowest value to customers, avoiding transformer problems. pressure customers

We assist our clients throughout the lifetime of their assets, products and infrastructure, helping them assure quality, reduce costs, increase productivity and foster a more responsible, sustainable culture.

Transformer Oil Analysis Methods

Breakdown Voltage or Dielectric Strength – IEC 60156/1995-05

A measure of the ability of the oil to withstand electric stress (voltage) without failure. Oils with high breakdown voltage are deemed good electrical insulators. Contaminants such as water, sediment and conducting particles (dirt) reduce the breakdown voltage of insulating oil.

Moisture Content – IEC 60814

Moisture can reduce transformer oil’s effectiveness as an insulator. Elevated moisture content also accelerates the degradation of the paper. A progressive reduction of the paper-oil insulating properties can result in electrical defects such as partial discharge, which can evolve into electrical discharges and power arcs with electrical faults in the transformer. A transformer with less than one percent moisture content in the paper could typically last 40 years, whereas a moisture content of four percent or higher could reduce the anticipated life to 10 – 15 years.

Dissipation & Resistivity Factor – IEC 60247

The dissipation test measures the leakage current through oil, which is the measure of the contamination or deterioration. The test is not specific in what it detects i.e. more a screening test. Resistivity is a reliable indicator of the condition of transformer oil, low resistivity values being a sign of oil, which contains particulate contaminants and oxidative products.

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