Portable Insulation Oil DGA Tester

Product Features

1. Fast measuring in the field: Within 20 minutes, 7 key fault gases and moisture can be read.

2. No consumables: Pure physical photo-acoustic spectroscopy technology, the consumables of calibration gas and carrier gas are needless.

3. Moisture in the oil: The concentration of moisture in the oil can be given during the same one test.

4. Easy to operate: Touch keyboard operation, simple and easy to operate, no need for training

5. Portable and rugged: Weighs <10 kg, in a rugged and convenient carry case.

6. Reliable: Engineered design provides inherent reliability and high accuracy.

7. DGA diagnosis: International general faults gases diagnosis method, preset the warning limits. Roger’s ratios, Duval's Triangle, IEEE key gases.

8. PC communication: External PCs is possible via USB connections, allowing databases to be imported or downloaded.

9. Samples: Oil and gas.

Technical Parameters

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What Does a Transformer DGA Analyzer Measure?

Dissolved Gas Analysis (DGA) is used to examine gases dissolved in transformer insulating oil. Different gases can be associated with different thermal, electrical, or insulation-related conditions inside a transformer.

The analyzer measures the concentration of key dissolved gases, including:

• Hydrogen (H₂)

• Methane (CH₄)

• Ethane (C₂H₆)

• Ethylene (C₂H₄)

• Acetylene (C₂H₂)

• Carbon monoxide (CO)

• Carbon dioxide (CO₂)

• Moisture (H₂O)

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Looking at these gases together is more useful than focusing on a single gas. For example, hydrogen, methane, ethane, ethylene, and acetylene are commonly considered when evaluating possible electrical or thermal activity, while CO and CO₂ can provide additional information about the condition of cellulose-based insulation.

Why Is DGA Used for Transformer Condition Monitoring?

A transformer can develop internal problems without showing an obvious external symptom. DGA provides a way to examine the gas condition of the insulating oil and identify changes that may require further investigation.

DGA results can be used during:

• Routine transformer maintenance

• Preventive condition monitoring

• Commissioning and acceptance testing

• Troubleshooting

• Follow-up after abnormal operating conditions

• Long-term trend analysis

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A single DGA result provides useful information, but trend data can be even more valuable. Comparing results from the same transformer over time can help maintenance teams identify changes in gas concentration and determine whether additional investigation is needed.

What Do the Seven Key Fault Gases Indicate?

The seven gases measured by the analyzer do not have one fixed meaning. Their significance depends on the concentration, gas combination, rate of change, transformer design, operating history, and other test results.

These relationships are used as part of a diagnostic process rather than as a standalone fault conclusion.

What Are the Limitations of DGA Results?

DGA is a condition-monitoring method, not a complete transformer diagnostic system.

A gas concentration should not be interpreted without considering the sampling method, transformer operating conditions, historical data, and other relevant tests. Different diagnostic methods can also produce different interpretations when gas concentrations are close to diagnostic boundaries.

When an abnormal result is found, additional testing and engineering assessment may be required before maintenance action is taken.

This is particularly important when DGA results are used to support decisions involving major transformer maintenance or outage planning.

What Testing Standards Are Relevant to Transformer DGA?

DGA testing should be carried out according to the applicable standard and sampling procedure for the specific application.

Commonly referenced standards and guides include:

• IEC 60567 – Guidance on the sampling of gases and analysis of free and dissolved gases in oil-filled electrical equipment

• IEC 60599 – Guidance on the interpretation of dissolved and free gases analysis

• IEEE C57.104 – Guide for the interpretation of gases generated in mineral oil-immersed transformers

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The exact testing and diagnostic requirements can vary depending on the transformer type, oil type, regional practice, and utility procedure. Users should therefore confirm the applicable edition and acceptance criteria before testing.

How Can Wrindu Support Professional DGA Testing?

Wrindu develops and supplies electrical testing equipment for applications including transformer testing, oil testing, SF6 testing, cable testing, insulation testing, CT/PT testing, and other power equipment diagnostics.

For DGA applications, Wrindu combines measurement hardware with functions for data storage, PC communication, printing, and commonly used gas diagnosis methods. This allows the instrument to be used not only for obtaining individual gas readings but also for organizing and reviewing test information.

Wrindu provides a 1-year warranty for its testing equipment under the applicable warranty terms. Technical guidance is available for product operation, basic troubleshooting, and application-related questions. OEM, ODM, and customized configurations can also be discussed for specific project requirements.