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  • BS 7821-1:1995

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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 General requirements and requirements for transformers with highest voltage for equipment not exceeding 24 kV

    Available format(s):  Hardcopy, PDF

    Superseded date:  31-07-2007

    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
    Specification
    Foreword
    1 General
    2 Electrical characteristics
    3 Design requirements
    4 Dimensional characteristics
    5 Accessories
    Annexes
    A (informative) A-deviations
    B (normative) Normative references

    Abstract - (Show below) - (Hide below)

    Covers transformers from 50 to 2500 kVA intended for operation in three-phase distribution networks, for indoor or outdoor continuous service, 50 Hz, immersed in mineral-oil, natural cooling, with two windings.

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

    Committee PEL/14
    Development Note Supersedes 92/29073 DC (01/2004)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

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

    BS 7877:1999 Busbar bushings up to 1 kV and from 1,25 kA to 5 kA, for liquid filled transformers
    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 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. Distribution transformers with cable boxes on the high voltage and/or low voltage side General requirements

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

    BS 171-1:1978 Power transformers General
    IEC TR 60616:1978 Terminal and tapping markings for power transformers
    HD 428.2.3 : 200S1 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 SECTION 3: CABLE BOXES TYPE 2 FOR USE ON DISTRIBUTION TRANSFORMERS MEETING THE REQUIREMENTS OF HD 428.2.1
    HD 428.2.2 : 200S1 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 - SECTION 2: CABLE BOXES TYPE 1 FOR USE ON DISTRIBUTION TRANSFORMERS MEETING THE REQUIREMENTS OF HD 428.2.1 S1
    HD 428.2.1 : 200S1 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
    BS 7697:1993 Nominal voltages for low voltage public electricity supply systems
    BS 171-3:1987 Power transformers Specification for insulation levels and dielectric tests
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