IEEE C57.94 2016
$26.54
IEEE Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type Distribution and Power Transformers
| Published By | Publication Date | Number of Pages |
| IEEE | 2016 | 29 |
Revision Standard – Active. Recommendations for operation and maintenance of dry-type distribution and power transformers are provided.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | IEEE Std C57.94-2015 Front Cover |
| 3 | Title page |
| 5 | Important Notices and Disclaimers Concerning IEEE Standards Documents |
| 8 | Participants |
| 10 | Introduction |
| 11 | Contents |
| 12 | Important Notice 1. Overview 1.1 Scope |
| 13 | 1.2 Purpose 2. Normative references |
| 14 | 3. Definitions 4. Application 4.1 Fire protection 4.2 Unusual operating conditions 4.2.1 High altitude operation 4.2.2 Impact loading 4.2.3 Over excitation 4.3 Surge voltage protection |
| 15 | 4.4 Transient voltage protection 4.5 Environmental considerations 4.5.1 Ventilated and non-ventilated dry-type transformers 4.5.2 Sealed dry-type transformers 4.5.3 Hazardous areas 4.6 Maintenance accessibility 4.6.1 Clearance |
| 16 | 4.6.2 Removal 4.7 Personnel and public safety 4.8 Room requirements |
| 17 | 4.9 Outdoor applications 4.10 Loading 4.10.1 Unusual conditions 4.10.2 Insulation system temperature class 4.11 Audible sound control 4.11.1 Audible sound sources |
| 18 | 4.11.2 Control of audible sound sources 4.11.3 Control of audible sound transmission 5. Installation 5.1 Visual inspection 5.1.1 Inspection upon receipt 5.1.1.1 General |
| 19 | 5.1.1.2 Ventilated and non-ventilated 5.1.1.3 Sealed 5.1.2 Inspection prior to energization 5.1.2.1 General 5.1.2.2 Sealed 5.2 Handling 5.2.1 Handling in inclement weather |
| 20 | 5.2.2 Precautions in lifting 5.2.3 Skidding or rolling 5.2.4 Movement of a transformer 5.3 Grounding 6. Testing 6.1 General |
| 21 | 6.2 Pre-service tests 6.2.1 Recommended pre-service tests 6.2.2 Optional pre-service tests 6.3 Periodic tests 6.3.1 Recommended preventive maintenance tests 6.3.2 Optional preventive maintenance tests |
| 22 | 6.4 Test procedures 6.4.1 Insulation resistance test 6.4.2 Insulation power factor test 7. Operation 7.1 De-energized tap changer 7.2 Effect of humidity on ventilated and non-ventilated dry-type transformers |
| 23 | 7.3 Effect of pressure on sealed dry-type transformers 7.3.1 Dielectric strength and heat transfer 7.3.2 Overload 7.3.3 Gas condensation 7.3.4 Moisture 8. Maintenance 8.1 Periodic inspection and maintenance |
| 24 | 8.1.1 Inspection of ventilated and non-ventilated dry-type transformers 8.1.2 Maintenance of ventilated and non-ventilated dry-type transformers 8.1.3 Inspection of sealed dry-type transformers 8.2 Storage 8.2.1 Ventilated and non-ventilated dry-type transformers |
| 25 | 8.2.2 Sealed dry-type transformers 8.3 Drying core and coil assembly 8.3.1 General 8.3.2 Drying by internal heat 8.3.3 Drying by external heat |
| 26 | 8.3.4 Drying by external and internal heat 8.3.5 Determining drying time 8.3.5.1 General 8.3.5.2 Measurement of insulation resistance |
| 27 | 8.3.6 Drying sealed dry type transformers 8.3.6.1 Removal of moisture 8.3.6.2 Resealing of case |
| 28 | Annex A (informative) Bibliography |
| 29 | Back cover |
