You asked: What is the purpose of dissolved gas analysis in transformers?

Why is DGA important?

The use of Dissolved Gas Analysis (DGA) as a method for determining the types of pending or occurring faults within power transformers has been in practice for many years. It has been proven that the generation of certain gases within a transformer is an excellent indicator that a failure is pending.

What is DGA monitoring?

Dissolved Gas Analysis (DGA) is a great way to detect and diagnose transformer problems in their early stages by tracking increasing dissolved gas levels as conditions deteriorate. Data to support decisions must be both accurate and precise so that appropriate decisions are made in a timely manner.

What is a DGA power?

Dissolved Gas Analysis – DGA

Dissolved Gas Analysis (DGA) in power transformers is a critical component in condition-based maintenance (CBM) and in identifying faults and preventing unplanned transformer outages.

How does dissolved gas analysis work?

Dissolved gas analysis (DGA) is an examination of electrical transformer oil contaminants. Insulating materials within electrical equipment liberate gases as they slowly break down over time. … DGA usually consists of sampling the oil and sending the sample to a laboratory for analysis.

Which insulation is used in transformer?

The solid insulation materials widely used in the transformer are paper, press- board, and transformer board, which are formed from the cellulose found in plants. Cellulose insulation with mineral oil has played a major role as the main insulation system for transformers for a very long time.

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What is gassing in a transformer?

Stray gassing of hydrogen refers to the generation of hydrogen under moderate temperatures in the transformer. The cause has been attributed to the refining process and the possible presence of certain incompatible materials in the transformer or additives in the oil.

How do you measure dissolved gas?

Dissolved gas pressure is measured by submerging a headspace volume with a gas-permeable membrane, allowing dissolved gases in the water to equilibrate with gases in the headspace, then measuring the pressure in the headspace with a pressure transducer.

What is Duval Triangle?

Abstract: A Duval triangle is a diagram used for fault type identification in dissolved-gas analysis of oil-filled high-voltage transformers and other electrical apparatus. … Diagnostic pentagons published by Duval and others seek to emulate the triangles while incorporating five fault gases instead of three.