NDLI: Natural ester dielectric fluid development update

Content Provider	IEEE Xplore Digital Library
Author	McShane, C.P. Corkran, J. Rapp, K. Luksich, J.
Copyright Year	2009
Abstract	Since the early 1980s, Cooper Power Systems has been actively involved in exploring and developing ester-based dielectric fluids. Introduced in 1984, our first commercialized ester was a synthetic polyol ester, developed primarily as an environmentally acceptable Askarel substitute. Although its technical performance is very good, the cost is prohibitive for most applications. The desirable properties of the polyol ester spurred exploration into other, more cost-effective, ester chemistries. This led to the evaluation of a natural (vegetable oil) ester dielectric coolant having many of the same performance advantages of synthetic esters, but much more economical. The major disadvantages of the natural esters are their inherent susceptibility to oxidation and higher pour point. We undertook a massive natural ester research and development program beginning in the early 1990s. Significant improvement low temperature flow was achieved. Oxidation inhibitors together with proper method-of-use overcome the oxidation stability issues. In many ways the natural esters perform better than the less-flammable fluids they replace, and offer significant advantages for applications where naphthenic mineral oils are traditionally applied. Although initially developed for distribution transformers, application in medium and large power transformers is becoming more common. This paper summarizes our laboratory and field experience and is an update of work presented in 2006.
Starting Page	1
Ending Page	6
File Size	7895390
Page Count	6
File Format	PDF
ISBN	9781424442416
ISSN	19449925
DOI	10.1109/PES.2009.5275164
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-26
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dielectrics Oxidation Petroleum Power systems Commercialization Costs Chemistry Coolants Power generation economics Environmental economics thermo-kinetic degradation dielectric liquids dielectric materials insulation life environmentally preferred less-flammable dielectric fluid natural ester oil insulation polyol ester thermo-hydrolytic degradation
Content Type	Text
Resource Type	Article

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