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Power transformers Specification for tappings and connections
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Available format(s): Hardcopy, PDF
Superseded date: 23-07-2013
Language(s): English
Published date: 31-08-1978
Publisher: British Standards Institution
National forewordCooperating organizationsSection one - TappingsClause1 Scope2 Requirements valid for all categories of voltage variation2.1 General2.2 Principal tapping2.3 Specification of the tapping range2.4 Short-circuit impedance specification2.5 Load loss requirements2.6 Requirements related to temperature rise (guarantees and tests)2.7 Requirements related to operation at a voltage higher than the tapping voltage3 Definition and additional requirements for constant flux voltage variation3.1 Definition of constant flux voltage variation (C.F.V.V.)3.2 Additional requirements for constant flux voltage variation (C.F.V.V.)3.3 Separate winding transformers of rated power up to and including 3 150 kVA and a tapping range up to and including + or - 5%4 Definition and additional requirements for variable flux voltage variation4.1 Definition of variable flux voltage variation (V.F.V.V.)4.2 Additional requirements for variable flux voltage variation (V.F.V.V.)5 Definition and additional requirements for combined voltage variation5.1 Definition of combined voltage variation (Cb.V.V.)5.2 Additional requirements for combined voltage variation (Cb.V.V.)Section two - Connections6 Connections of phase windings7 Phase displacement between windingsAppendix A Examples of specifications for transformers with tappingsAppendix B Transformer connections in general useFigures
Requirements valid for all categories of voltage variation, additional requirements for particular types of voltage variation, connections of phase windings and phase displacement between windings.
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