Provided in this recommended practice are calculation methods for conservatively evaluating the feasibility for an existing installed dry-type or liquid immersed transformer, to supply nonsinusoidal load currents as a portion of the total load. Also provided is necessary application information to assist in properly specifying a new transformer expected to carry a load, a portion of which is composed of nonsinusoidal load currents. A number of examples illustrating these methods and calculations are presented. Reference annexes provide a comparison of the document calculations to calculations found in other industry standards. Suggested temperature rise calculation methods are detailed for reference purposes.
- Sponsor Committee
- PE/TR - Transformers
- Status
- Active Standard
- PAR Approval
- 2014-06-12
- Superseding
- C57.110-2008
- Board Approval
- 2018-06-14
- History
-
- Published:
- 2018-10-31
Working Group Details
- Society
-
IEEE Power and Energy Society - Sponsor Committee
- PE/TR - Transformers
- Working Group
-
WGC57.110 - Performance Characteristics - Non-Sinusoidal Load Current Working Group
- IEEE Program Manager
- Patrycja Jarosz
Contact Patrycja Jarosz - Working Group Chair
- Richard Marek
Other Activities From This Working Group
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These standards have been replaced with a revised version of the standard, or by a compilation of the original active standard and all its existing amendments, corrigenda, and errata.
C57.110-1986
IEEE Recommended Practice for Establishing Transformer Capability When Supplying Nonsinusoidal Load Currents
The purpose of the report is to establish uniform methods for determining the capability of transformers to supply nonsinusoidal load currents, without loss of normal life expectancy. Two methods are described. The first is intended for use by those with access to detailed information on loss density distribution within the transformer windings. The second is less accurate and is intended for use by those with access to transformer certified test report data only. It is anticipated that the first method will be used primarily by transformer design engineers, while the second will be employed primarily by users. This recommended practice will be applicable for evaluating the feasibility of applying nonsinusoidal load currents to existing transformers and for specifying new transformers to supply nonsinusoidal loads.
C57.110-1998
IEEE Recommended Practice for Establishing Transformer Capability When Supplying Nonsinusoidal Load Currents
Superseded by IEEE Std C57.110-2008. Methods are developed to conservatively evaluate the feasibility of supplying additional nonsinusoidal load currents from an existing installed dry-type or liquified transformer, as a portion of the total load. Clarification of the necessary application information is provided to assist in properly specifying a new transformer expected to carry a load, a portion of which is composed of nonsinusoidal load currents. A number of examples illustrating these methods and calculations are presented. Reference annexes make a comparison of the document calculations to calculations found in other industry standards and suggested temperature rise methods are detailed for reference purposes.
C57.110-2008
IEEE Recommended Practice for Establishing Liquid-Filled and Dry-Type Power and Distribution Transformer Capability When Supplying Nonsinusoidal Load Currents
This recommended practice provides calculation methods to conservatively evaluate the feasibility for an existing installed dry-type or liquid-filled transformer, to supply nonsinusoidal load currents as a portion of the total load. This recommended practice also provides necessary application information to assist in properly specifying a new transformer expected to carry a load, a portion of which is composed of nonsinusoidal load currents. A number of examples illustrating these methods and calculations are presented. Reference annexes provide a comparison of the document calculations to calculations found in other industry standards. Suggested temperature rise calculation methods are detailed for reference purposes.
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