IEEE C57.12.36-2007

$62.83

IEEE Standard Requirements for Liquid-Immersed Distribution Substation Transformers

Published By	Publication Date	Number of Pages
IEEE	2007	41

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Description

New IEEE Standard – Superseded. 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.

PDF Catalog

PDF Pages	PDF Title
1	Front Cover
3	IEEE Standard Requirements for Liquid-Immersed Distribution Substation Transformers
6	Introduction Notice to users Laws and regulations Copyrights
7	Updating of IEEE documents Errata Interpretations Patents
8	Participants
11	Contents
13	IEEE Standard Requirements for Liquid-Immersed Distribution Substation Transformers 1. Overview 1.1 Scope
14	1.2 Mandatory requirements 2. Normative references
15	3. Definitions 4. Rating data 4.1 Usual service conditions 4.2 Kilovolt-ampere ratings
16	4.3 Voltage applications
17	4.4 Standard levels for basic lightning impulse insulation 4.5 Taps 4.6 Impedance voltage tolerance
18	4.7 Routine tests 4.8 Dielectric test levels 5. Construction 5.1 Accessories
24	5.2 Bushings
26	5.3 Enclosures
27	5.4 Other neutral terminations
29	5.5 Lifting, moving, and jacking facilities
30	5.6 Nameplate
31	5.7 Ground provisions 5.8 Polarity, angular displacement, and terminal markings
32	5.9 Liquid preservation
33	5.10 Tanks 5.11 Auxiliary cooling equipment
35	5.12 Power supply for transformer auxiliary equipment and controls 5.13 Bushing-type current transformers
36	5.14 Surge arresters 5.15 Insulating liquid
37	5.16 Loading 6. Installation and storage
38	Annex A (informative) Substation equipment coordination for secondary unit substations