IEEE C57.110-2008
$98.04
IEEE Recommended Practice for Establishing Liquid-Filled and Dry-Type Power and Distribution Transformer Capability When Supplying Nonsinusoidal Load Currents
| Published By | Publication Date | Number of Pages |
| IEEE | 2008 | 54 |
Revision Standard – Superseded. 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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | IEEE Std C57.110-2008 Front Cover |
| 3 | Title Page |
| 6 | Introduction |
| 7 | Notice to users Laws and regulations Copyrights Updating of IEEE documents Errata Interpretations |
| 8 | Patents Participants |
| 10 | Contents |
| 11 | Important Notice 1. Overview 1.1 Scope 1.2 Purpose |
| 12 | 2. Normative references 3. General considerations 3.1 Transformer losses |
| 13 | 3.2 Transformer capability equivalent |
| 14 | 3.3 Basic data 3.4 Transformer per-unit losses |
| 15 | 3.5 Transformer losses at measured currents |
| 17 | 3.6 Harmonic loss factorTPPT for winding eddy currents |
| 20 | 3.7 Harmonic loss factor for other stray losses |
| 22 | 4. Design considerations for new transformer specification 4.1 Harmonic current filtering 4.2 Impact on the neutral 4.3 Power factor correction equipment |
| 23 | 4.4 Electrostatic ground shields 4.5 Design consideration outside the windings 4.6 Harmonic spectrum analysis 4.7 Design consideration in the windings |
| 24 | 5. Recommended procedures for evaluating the load capability of existing transformersTPPT 5.1 Transformer capability equivalent calculation using design eddy-current loss data |
| 32 | 5.2 Transformer capability equivalent calculation using data available from certified test report |
| 34 | 5.3 Typical calculations for dry-type transformers |
| 37 | 5.4 Typical calculations for liquid-filled transformers |
| 40 | 5.5 Neutral bus capability for nonsinusoidal load currents that include third harmonic components |
| 41 | Annex A (informative)Bibliography |
| 43 | Annex B (informative)Comparison of UL K-factor definition and IEEE C57.110 harmonic loss factor definition |
| 46 | Annex C (informative)Temperature rise testing procedures |
| 52 | Annex D (informative)Tutorial discussion of transformer losses and the effect of harmonic currents on these losses |
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