DGA ナビゲーターについて






単発のサンプリングデータだけではなく長期間に渡り蓄積されたデータをこのDGAナビゲーターにインプットするだけで、専門的な知識がなくとも変圧器内の状態を可視化し簡単に知ることができます。これはTBM*1 (時間基準保全)からCBM*2 (状態基準保全)への移行をサポートし、保守の効率化、安定的な稼働の担保、機器更新の時期決定などに大きく貢献します。 

*1 Time Based Maintenance *2 Condition Based Maintenance




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Power eBook pages open


 新しく制作された電力業界向けの eBookです

Frequently asked questions

Why was the DGA calculator created?

We wanted to create a powerfully intuitive tool suitable for people new to dissolved gas analysis that would help them learn more about the diagnostic side of DGA, that would also still be useful for the experts in their day-to-day work.

Vaisala always focuses on understanding our customers, and we also share some of the knowledge we find along the way. This is a part of the core values of Vaisala.

Who is the DGA calculator for?

Both beginners and experts who deal with dissolved gas analysis and the interpretation of the results. The calculator is also perfectly suitable for anyone curious about learning how the DGA methods work.

What can I use the DGA Calculator for?

The main use is the calculation of fault types and checking if your transformer's DGA results exceed the typical values.

The fault type identification is based on Duval triangles and pentagons, while the typical values come from the standards IEEE C57.104-2019 or IEC 60599:2022. You can choose to use either method, adhering to either standard based on your personal preference and need.

In the Vaisala DGA calculator, these have been visualized to make calculations and viewing the results more intuitive.

What are Duval triangles and pentagons?

The Duval triangle and pentagon methods have been developed by Dr. Michel Duval and are considered to be some of the most effective tools for identifying transformer fault types from DGA results.

The methods provide a fault type and a visual representation that may help understand the development of the fault as well as whether the type has progressed. The implementation of the calculator follows the latest version of these methods, provided by Dr. Duval himself.

Can I use data from my DGA laboratory?

Yes. That is what the calculator is mainly intended for. Importing the data is easy. All you need to do is use the custom CSV file you can download from the calculator page, populate it with your data and upload it. Up to 30 historic entries are supported at one time.

What is the difference between the IEC and IEEE standards?

The typical values in each respective standard are based on a different database of DGA results, collected from different geographical areas.

Also, there are slight differences in the approach of categorizing typical values based on use case, as per the views of different experts of the committees creating the standards.

What if my results show something alarming? 

The calculator’s purpose is chiefly educational and informational. If your results seem alarming, you should contact a power transformer expert or the manufacturer for a consultation. The results of the calculator alone, without consulting with an expert are not a basis for action. 

Can I share the results?

Yes. You can download the results as a PDF that has your own notes included and share them with e.g. colleagues or customers. 

Can I store my DGA data?

The data will only be stored in your browser until cleared. However, you will not be able to share or access a previous dataset. 

To store your results, simply export them in the PDF report from the calculator.

Are results linked to my profile?

There is no profile to collect data into. Your registration information is not linked to actual usage of the calculator. We do collect usage information from the calculator, but all such usage data is anonymous, and there is no access to know who the data is from.

Is Dr. Duval aware of the calculator?

Yes. The creation of the calculator included a session to with Dr. Duval to confirm that the results match the original implementations.

While the methods themselves are shared in the relevant standards, but require a bit more work to use when working with just the standard documents. This is also one of the reasons we wanted to create this calculator.