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BS 7821-2.1:1995 Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV. Part 2. Distribution transformers with cable boxes on the high voltage and/or low voltage side - Part 2.1 General requirements

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HD 428.1 subclause 3.3 states that a distribution transformer could have different termination features. The following constructional situations are possible:- i) Termination in open type (oil-air) bushings without protection. This is covered by HD 428.1, HD 428.3, HD 506, HD 596 and HD 607. ii) Termination in plug-in type bushings of inside or outside cone type. This is covered by HD 428.1, HD 428.3 and HD 506. iii) Termination in air filled or oil/compound filled cable boxes or protective enclosure using open type and/or oil-oil bushings, as defined in HD 428.2.2. iv) Flange boxes and similar solutions using open type bushings can also be used. This document covers, in conjunction with HD 428.1, distribution transformers under iii)and iv) above, up to 24 kV. An annex may in the future be issued to cover 36 kV.Further documents exist which may be used by agreement between purchaser andmanufacturer for cable boxes and enclosures. The dimensional requirements for cableboxes and protective enclosures are not included in this document.Unless otherwise stated in this document, HD 428.1 shall be applied.
Contributor(s):
MAR - Data Entry Person
Primary Item Type:
British Standard
Identifiers:
ICS  29.180 Transformers. Reactors
ISBN 058024718X
Language:
English
Subject Keywords:
Boxes (electric); Flanges; Oil-immersed transformers; High-voltage equipment; Cable junctions; Three-phase transformers; Transformers; Power transformers; Alternating-current transformers; Distribution transformers; Rated frequencies; Electric connectors; Rated voltage
First presented to the public:
12/29/2022
Original Publication Date:
9/15/1995
Previously Published By:
British Standards Institution
Place Of Publication:
London, United Kingdom
Citation:
Extents:
Number of Pages - 14
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2022-12-29 14:32:06.988
Submitter:
Muhamad Azmil Ramli

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BS 7821-2.1:1995 Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV. Part 2. Distribution transformers with cable boxes on the high voltage and/or low voltage side - Part 2.1 General requirements1 2022-12-29 14:32:06.988
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