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FM 3990 : 2018

Current
Current

The latest, up-to-date edition.

LESS OR NONFLAMMABLE LIQUID-INSULATED TRANSFORMERS
Published date

12-01-2013

Publisher

Factory Mutual Research Corporation

1 INTRODUCTION
2 GENERAL INFORMATION
3 GENERAL REQUIREMENTS
4 PERFORMANCE REQUIREMENTS
5 OPERATIONS REQUIREMENTS
6 BIBLIOGRAPHY
APPENDIX A - TRANSFORMER SPECIFIC
             DEFITIONS AND TESTS

Provides performance requirements for liquid insulated distribution and power transformers, both naturally colled and transformers utilizing

DevelopmentNote
Effective date: 31/01/2021. (03/2018)
DocumentType
Standard
PublisherName
Factory Mutual Research Corporation
Status
Current

FM 6933 : 1993 LESS FLAMMABLE TRANSFORMER FLUIDS
IEEE C57.12.00-2015 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
IEEE/ASTM SI_10-2010 American National Standard for Metric Practice
IEC 60076-4:1976 Power transformers - Part 4: Tappings and connections
IEC 60076-8:1997 Power transformers - Part 8: Application guide
IEEE C57.12.90-2010 IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers
FM 6934 : 1983 NONFLAMMABLE TRANSFORMER FLUIDS
IEC 60076-3:2013 Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air
IEC 60076-1:2011 Power transformers - Part 1: General
IEC 60076-2:2011 Power transformers - Part 2: Temperature rise for liquid-immersed transformers

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