BS 3399:1961

Single-phase and polyphase, double wound power transformers and reactors having windings insulated with Class A, B, H or C materials, 1 kVA to 1000 kVA and rated line to line voltage up to 3300 volts. Dry and oil-immersed transformers. For service in ships sailing in temperate or tropical waters. Limits of temperature rise, regulation, performance requirements, ratings, terminal markings. Cooling methods classified, position of external terminals, list of external fittings and their positions. Routine tests, temperature rise test. Supplementary high-voltage tests, methods of declaring efficiency, calculation of inherent regulation, connection diagrams, vector diagrams, information with enquiry and order, additional fittings for oil-immersed transformers. Illustrated.Cross References:BS 148BS 171BS 2562BS 2757CP 1009