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  • BS 7821-2.1:1995

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV. Distribution transformers with cable boxes on the high voltage and/or low voltage side General requirements

    Available format(s):  Hardcopy, PDF

    Superseded date:  31-08-2007

    Language(s):  English

    Published date:  15-09-1995

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    Committees responsible
    National foreword
    Foreword
    1. General
    2. Definitions
    3. Electrical characteristics
    4. Design characteristics
    5. Transformer requirements
    6. Distance between bushings
    7. Tests
    Figures
    1. Transformer with cable boxes, type 1 side mounted
    2. Unit substation transformer, with cable boxes type 1
         side mounted
    3. Transformers with cable boxes, type 1 cover mounted
    4. Cover mounted, air filled common HV/LV cable box
         type 2
    5. Unit substation transformers, cover mounted
    6. Typical flange for flange box

    Abstract - (Show below) - (Hide below)

    Deals with general requirements for distribution transformers up to 24 kV. Does not give the dimensional requirements for cable boxes and protective enclosures.

    General Product Information - (Show below) - (Hide below)

    Committee PEL/14
    Development Note Supersedes 92/29074 DC (10/2005)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS 7821-2.3:1998 Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV. Distribution transformers with cable boxes on the high voltage and/or low voltage side Cable boxes type 2 for use on distribution transformers meeting the requirements of BS 7821-2.1

    Standards Referencing This Book - (Show below) - (Hide below)

    BS 7616:1993 Specification for bushings for liquid filled transformers above 1 kV and up to 36 kV
    BS 7821-1:1995 Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV General requirements and requirements for transformers with highest voltage for equipment not exceeding 24 kV
    BS 7821-3:1995 Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV Supplementary requirements for transformers with highest voltage for equipment equal to 36 kV
    BS 171-3:1987 Power transformers Specification for insulation levels and dielectric tests
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