Original scientific paper

Sustainability without compromises

Krešimir Koprivec

Abstract

There is a very small amount of detailed experience available regarding instrument transformers filled with biodegradable liquids. In an effort to make their entire high-voltage product line more sustainable, thus providing considerable added value, Končar – Instrument Transformers, decided to implement all available biodegradable liquid technologies into their instrument transformers. While it may seem trivial, there is extensive dielectric, thermal, climatic and material compatibility testing that needs to be done, before a dielectric liquid can be approved for use.
That being said, the aim of this article is to give a brief overview of performed tests and gathered data. The focus will be on prototypes filled with two different types of biodegradable liquids: synthetic ester MIDEL 7131 and bio-hydrocarbonbased oil Nynas Nytro BIO 300X. Both of
the liquids successfully completed the entire testing cycle and are considered approved for commercial use.

Keywords

Instrument transformers, biodegradable liquids, dielectric performance, simulated ageing, internal arc

Hrčak ID:

307291

URI

https://hrcak.srce.hr/307291

Publication date:

17.5.2023.

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