NEMA publishes NEMA ST 20-2014 Dry Type Transformers for General Applications
USA, Virginia: The National Electrical Manufacturers Association (NEMA) published reinstated NEMA ST 20-2014 Dry Type Transformers for General Applications.
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USA, Virginia: The National Electrical Manufacturers Association (NEMA) published reinstated NEMA ST 20-2014 Dry Type Transformers for General Applications.
The revised NEMA ST 20 applies to single-phase and polyphase dry-type transformers (including autotransformers and non-current-limiting reactors) for supplying energy to power, heating, and lighting circuits, and designed in accordance with the National Electrical Code®, reports Thomasnet News.
It also covers transformers with or without accessories of 1.2 kV class, 0.25 kVA through 4000 kVA. Changes include a single average sound level table, more alignment with IEEE and a new appendix providing a brief introduction to U.S. efficiency regulations. NEMA ST 20 specifically addresses sound levels for this particular type of transformer.
NEMA is the association of electrical equipment and medical imaging manufacturers, founded in 1926 and headquartered in Rosslyn. Its companies manufacture power transmission and distribution equipment, lighting systems, factory automation and control systems, and medical diagnostic imaging systems.
Source: Thomasnet News
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