IEEE C57 12 20-2017 en Overhead-Type Distribution Transformers 500 kVA and Smaller High Voltage 34 500 V and Below Low Voltage 7970 13 800Y V and Below.pdf

1、IEEE Standard for Overhead-Type Distribution Transformers 500 kVA and Smaller; High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below IEEE Std C57.12.20-2017 (Revision of IEEE Std C57.12.20-2011) IEEE Power and Energy Society Sponsored by the Transformers Committee IEEE 3 Park Avenu

2、e New York, NY 10016-5997 USAIEEE Std C57.12.20-2017 (Revision of IEEE Std C57.12.20-2011) IEEE Standard for Overhead-Type Distribution Transformers 500 kVA and Smaller; High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below Sponsor Transformers Committee of the IEEE Power and Energ

3、y Society Approved 28 September 2017 IEEE-SA Standards Board IEEE prohibits discrimination, harassment, and bullying. For more information, visit http:/ www .ieee .org/ web/ aboutus/ whatis/ policies/ p9 -26 .html. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.