New IEEE Standard – Inactive – Superseded. Superseded. Electrical, mechanical, and safety requirements of ventilated, nonventilated, and sealed dry-type distribution and power transformers or autotransformers, single and polyphase, with a voltage of 601 V or higher in the highest voltage winding, are described. Information that can be used as a basis for the establishment of performance, interchangeability, and safety requirements of equipment described, and for assistance in the proper selection of such equipment, is given.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 9<\/td>\n | 1 Scope 2 Terminology 3 References 3.1 Standards References <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 3.2 Applicable Documents in Preparation 4 Serviceconditions 4.1 Usual Service Conditions 4.2 Unusual Service Conditions <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Table 1 Dielectric-Strength Correction Factors for Altitudes Greater than 3300 ft (1000 m) <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 5 RatingData Cooling Classes of Transformers 5.2 Frequency 5.3 Phases 5.4 RatedkVA Table 2 Preferred Continuous kVA Ratings <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 5.6 Connections Polarity Angular Displacement and Terminal Markings 5.8 Impedance 5.9 Losses Fig 1 Phase Relation of Terminal Designations for Three-phase Transformers <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5.10 Insulation Levels Table 3 Insulation Levels for Dry-Type Transformers <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Temperature Rise and Insulation-System Capability <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Table 4 Limits of Temperature Rise for Continuously Rated Transformers <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 5.12 Nameplates <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Table 5 Nameplate Information <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Fig 2 Designation of Voltage Ratings of Single- and Three-phase Windings <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 6 Construction 6.1 Tank-Pressure Requirements 6.2 Finish 6.3 Transformer Accessories 6.4 Terminals 6.5 Grounding Sh ort-Circuit Characteris tics 7.1 Short-circuit Requirements 7.2 Transformer Categories <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Short-Circuit-Current Duration and Magnitude <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | System Zero-Sequence Data Application Conditions Requiring Special Consideration 7.6 Components Table6 ValuesofK <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Base BVA and Base Currents Effects of Temperature on Transformer Windings During Short-circuit Conditions Calculation of Winding Temperature During a Short Circuit <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Testing and Calculations 8.1 General 8.2 Test Classifications Routine Design and Other Tests 8.4 Calculations 9 Tolerances 9.1 Ratio 9.2 Impedance <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 9.3 Losses Table 7 Dry-Type Transformer Tests Table 8 Tolerances for Single-phase and Three-phase Transformer Losses <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Connection of Transformers for Shipment <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Unusual Temperature and Altitude Conditions A1 Unusual Temperature and Altitude Service Conditions A2 Effect of Altitude on Temperature Rise A3 Operation at Rated kVA A4 Operation at Less than Rated kVA Table A1 Maximum 24H Average Temperature of Cooling Air Table A2 Rated kVA Derating Factors for Altitudes Greater than 3300 ft (1000 m) <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Dry-Type Transformers Incorporating Solid Cast and\/or Resin-Encapsulated Windings<\/b><\/p>\n |