See Norsk Termbank (NOT) database. RTT published a number of useful N-E dictionaries for power station technology including RTT 45 Ordbok for vannturbiner. Prestesæter also has a lot of hydroelectric power terms.

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Note added at 4 days (2005-04-02 18:50:36 GMT) Post-grading
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Norsk Termbank (NOT) was developed at the University of Bergen. The following information is available at http://spraktek.aksis.uib.no/projects/not

Termbasen NOT er resultatet av mange års terminologiarbeid i forbindelse med ulike prosjekter, og er utviklet ved Norsk Termbank, senere HIT-senteret. Basen inneholder ca. 30 000 poster med totalt 90 000 søkbare termer, inkludert anbefalte og frarådete synonymer, på norsk og engelsk fra 38 ulike bruksområder. Basen er tilgjengelig i abonnement via Internett.

The Norwegian Council for Technical Terminology (Rådet for teknisk terminologi - RTT) was abolished some years ago. A large number of its dicionaries was made available on a CD-ROM. I do not know whether this is still available for purchase. I believe some of the individual dictionaries may still be available. Some information about its publications is available at http://www.rtt.org/ordb.html

Prestesæter\'s technical dictionaries No-En,En-No, De-En and En-De (Formatics technical dictionaries) are all available in electronic versions from Wordfinder (http://www.wordfinder.com/), who also provide a number of other useful specialist bilingual dictionaries for the Scandinavian languages among others.