IEEE C57.96-2013 pdf download IEEE Guide for Loading Dry-Type Distribution and Power Transformers
Purpose
This document provides users with guidelines and limitations for loading dry-type transformersaccording to nameplate rating. Guidance is also provided for assessing the risks and consequencesof loading above nameplate rating.
Normative references
The following referenced documents are indispensable for the application of this document (i.e.they must be understood andso each referenced document is cited in text and its relationshipto this document is explained). For dated references.the edition cited applies, For undatedonwreferences, the latest edition of the referenced document (including any amendments or corrigendaapplies.
This guide shall be usedwith the following publieations. When the fellewingstandards are superseded by an approved revision, the revision shall apply.
IEEE Std C57.12.01-1998 IM IEEE Standard General Requirements for Dry-Type Distribution andPower Transformers, Including Those with Solid-Cast and/or Resin Encapsulated Windings.l2
IEEE Std C57.12.56M 1986 (Reaff 1998), IEEE Standard Test Procedure for Thermal Evaluation ofInsulation Systems for Ventilated Dry-Type Power and Distribution Transformers.
The IEEE standards or products referred to in this clause are trademarks of The lnstitute of Electrical and Electronics EngineersIne.
2 IEEE publications are available from The Institute of Electrical and Electronics Engineers, 445 Hoes Lane, P-O-Box-133iPiscataway, N] 08855-1331 08854 USA (http://standards.ieee.org/).
IEEE Std C57.12.60TM IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Dry-Type Power and Distribution Transformers, Including Open-Wound, Solid-Cast, and Resin- Encapsulated Transformers.
IEEE Std C57.94TM, IEEE Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type General Purpose Distribution and Power Transformers.
Definitions
For the purposes of this document, the following terms and definitions apply. The IEEE StandardsDictionary Online should be consulted for terms not defined in this clause.3
drytype transformer: A transformer in which the core and coils are in a gaseous or drycompound insulating medium.
non-ventilated dry-type transformer: A dry-type transformer that is so constructed as toprovide no intentional circulation of external air through the transformer and operating at zerogauge pressure.
sealed transformer: A dry-type transformer with a hermetically sealed tank.
ventilated dry-type transformer: A dry-type transformer that is so constructed that the ambientair may circulate through its enclosure to cool the transformer core and windings