NEMA Standard ST 20-2021 Dry type transformers for general applications
Publication Year
2021
Document Status
Current
Abstract
Applies to single-phase and polyphase dry type transformers (including both autotransformers and noncurrent limiting reactors) for supplying energy to power, heating, and lighting circuits.
Document History
Supersedes NEMA ST 20-2014.
Publisher Information
National Electrical Manufacturers Association
The National Electrical Manufacturers Association (NEMA) represents electrical equipment and medical imaging manufacturers in North America, providing a forum for the development of technical standards, advocacy of industry policies on legislative and regulatory matters, and dissemination of industry data.
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Suite 900
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NEMA
USA
Website: https://www.nema.org/pages/default.aspx
Tel: +1 703 841-3200
