IEEE C57.110 2018
$42.25
IEEE Recommended Practice for Establishing Liquid Immersed and Dry-Type Power and Distribution Transformer Capability when Supplying Nonsinusoidal Load Currents
| Published By | Publication Date | Number of Pages |
| IEEE | 2018 | 68 |
Revision Standard – Active. 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 otherre industry standards. Suggested temperature rise calculation methods are detailed for reference purposes.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | IEEE Std C57.110™-2018 Front cover |
| 2 | Title page |
| 4 | Important Notices and Disclaimers Concerning IEEE Standards Documents |
| 7 | Participants |
| 9 | Introduction |
| 10 | Contents |
| 11 | IMPORTANT NOTICE 1. Overview 1.1 Scope 1.2 Purpose 2. Normative references |
| 12 | 3. Definitions 4. General considerations 4.1 Transformer losses |
| 13 | 4.2 Transformer capability equivalent |
| 14 | 4.3 Basic data 4.4 Transformer per-unit losses |
| 15 | 4.5 Transformer losses at measured currents |
| 17 | 4.6 Harmonic loss factor10 for winding eddy currents |
| 20 | 4.7 Harmonic loss factor for other stray losses |
| 22 | 5. Design considerations for new transformer specification 5.1 Harmonic current filtering 5.2 Impact on the neutral 5.3 Power factor correction equipment 5.4 Electrostatic ground shields |
| 23 | 5.5 Design consideration outside the windings 5.6 Harmonic spectrum analysis 5.7 Design consideration in the windings |
| 24 | 6. Recommended procedures for evaluating the load capability of existing transformers11 6.1 Transformer capability equivalent calculation using design eddy-current loss data |
| 31 | 6.2 Transformer capability equivalent calculation using data available from certified test report |
| 38 | 6.3 Neutral bus capability for nonsinusoidal load currents that include third harmonic components |
| 40 | Annex A (informative) Bibliography |
| 44 | Annex B (informative) Tutorial discussion of transformer losses and the effect of harmonic currents on these losses |
| 47 | Annex C (informative) Corrected harmonic loss factor for high frequencies19 C.1 Transformer winding losses computation using FEM C.2 Corrected harmonic loss factor |
| 49 | C.3 Example calculation for dry-type transformer |
| 51 | C.4 Conclusion |
| 52 | Annex D (informative) Comparison of UL K-factor definition and IEEE Std C57.110 harmonic loss factor definition D.1 UL definition of K-factor D.2 Relationship between K-factor and harmonic loss factor |
| 53 | D.3 Example calculations |
| 55 | Annex E (informative) Temperature rise testing procedures E.1 Preferred method of performing a temperature rise test21 E.2 Alternative simulated load temperature rise testing procedures22 |
| 60 | Annex F (informative) Derivation of the ratio of highest winding eddy loss to average F.1 Introduction F.2 Wire wound windings |
| 61 | F.3 Foil wound windings F.4 Conservative loss ratio estimate |
| 62 | Annex G (informative) Sample transformer loss data |
| 68 | Back cover |
Related products
-
IEEE C57.110-2018
IEEE Recommended Practice for Establishing Liquid Immersed and Dry-Type Power and Distribution Transformer Capability when…
