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FM Approvals 3990

Less or Nonflammable Liquid-Insulated Transformers

standard by FM Approvals , 01/01/2018

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FM Approvals 3990 sets performance requirements for liquid insulated distribution and power transformers, both naturally cooled and transformers utilizing forcibly circulated cooling medium. The standard limits Approval for the naturally cooled transformers rated from 5 to 10,000 kVA and 35 kV class or lower.
 

Product Details

Published:
01/01/2018
Number of Pages:
21
File Size:
1 file , 490 KB
Note:
This product is unavailable in Russia, Ukraine, Belarus
 

Document History

  1. FM Approvals 3990


    Liquid-Insulated Transformers

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  2. FM Approvals 3990:2021


    Liquid-Insulated Transformers

    • Historical Version

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    Less or Nonflammable Liquid-Insulated Transformers

    • Historical Version

  4. FM Approvals 3990


    Less or Nonflammable Liquid-Insulated Transformers

    • Historical Version