...look at some of the technology for three different product segments:

Power

Transformers on the market now are more energy efficient than any other time in the last 30 years--a return to efficiency levels of the 1950s to 1970s, when they were about 98 percent efficient.

In the 1980s, manufacturers bowing to competitive price pressures lowered the quality of electrical steel used in the construction of transformer cores in order to lower the price of manufacture. Consequently, energy efficiency fell to about 95 percent.

Some years ago, in the early 1990s, the federal government estimated that about 61 billion kWH of electricity was wasted annually in transformer losses. Manufacturers began offering more energy efficient products at that time, but the industry did not accept the products at the premium price, so the market did not obtain the benefits of the higher efficient products.

Recently, transformer manufacturers--now...

NOTE: All illustrations and photos have been removed from this article.



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