New IEEE Standard – Active. Small power transformers have become a significant element in distribution systems supplying large commercial customers like major resort hotels and site-specific industrial customers that desire the local utility to own, operate, and maintain the serving transformer. These transformers can range in sizes from 112.5 kVA to 10 000 kVA with primary voltages at 69 000 V and below and secondary voltages from 34 500 V to 120 V. Transformers in this standard are generally for larger distribution customers often with special voltages or installation requirements like convention centers with large chiller plants and extensive exhibit space. There is often a desire to serve these transformers from underground systems using side-mounted bushings on the primary. This standard seeks to define the small power transformer that is applied as more than just a limited scope version of the power transformers covered by IEEE Std C57.12.10 and as more than a large distribution class transformer covered by IEEE Std C57.12.34.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 1<\/td>\n | Front Cover <\/td>\n<\/tr>\n | ||||||
| 3<\/td>\n | IEEE Standard Requirements for Liquid-Immersed Distribution Substation Transformers <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | Introduction Notice to users Laws and regulations Copyrights <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Updating of IEEE documents Errata Interpretations Patents <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | Participants <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Contents <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | IEEE Standard Requirements for Liquid-Immersed Distribution Substation Transformers 1. Overview 1.1 Scope <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 1.2 Mandatory requirements 2. Normative references <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 3. Definitions 4. Rating data 4.1 Usual service conditions 4.2 Kilovolt-ampere ratings <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4.3 Voltage applications <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 4.4 Standard levels for basic lightning impulse insulation 4.5 Taps 4.6 Impedance voltage tolerance <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 4.7 Routine tests 4.8 Dielectric test levels 5. Construction 5.1 Accessories <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 5.2 Bushings <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 5.3 Enclosures <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 5.4 Other neutral terminations <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 5.5 Lifting, moving, and jacking facilities <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 5.6 Nameplate <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 5.7 Ground provisions 5.8 Polarity, angular displacement, and terminal markings <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 5.9 Liquid preservation <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 5.10 Tanks 5.11 Auxiliary cooling equipment <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 5.12 Power supply for transformer auxiliary equipment and controls 5.13 Bushing-type current transformers <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 5.14 Surge arresters 5.15 Insulating liquid <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 5.16 Loading 6. Installation and storage <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Annex A (informative) Substation equipment coordination for secondary unit substations <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" IEEE Standard Requirements for Liquid-Immersed Distribution Substation Transformers<\/b><\/p>\n |