Power conditioning measures are taken to ensure the supply of ‘clean’ electrical power for electrical and electronic installations. This article looks at the circumstances that create a need for power conditioning, with particular reference to library installations. The first part of the paper examines the causes and effects of power problems, treating some of the basic issues and problems associated with clean power, while the later sections focus on preventative measures and solutions to allow an installation to operate with clean power. Finally, the question of static electricity is briefly addressed and some protective measures are suggested.
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