BS EN 60076-57-15. Power transformers. Part 57-15. Standard requirements, terminology, and test code for step-voltage regulators
Edition 2016-10-19

BS EN 61869-1. Instrument transformers. Part 1. General requirements
Edition 2017-07-18

BS EN 61869-220. Instrument transformers. Part 220. Safety requirements for Instrument Transformers for low voltage applications
Edition 2017-02-28

BS EN 61857-41. Electrical insulation systems. Procedures for thermal evaluation. Part 41. Specific requirements for electrical insulation systems for use in dry-type high-voltage transformers with operating voltages of 1kV and above
Edition 2018-05-30

BS EN 61869-220 Ed1.0. Instrument transformers. Part 220. Safety requirements for Instrument Transformers for low voltage applications
Edition 2018-12-07

BS EN 61869-1. Instrument transformers. Part 1. General requirements
Edition 2019-03-13

BS EN IEC 61558-2-1. Safety of transformers, reactors, power supply units and combinations thereof. Part 2-1. Particular requirements and tests for separating transformers and power supplies incorporating separating transformers for general applications
Edition 2019-08-29

BS EN IEC 61558-2-4. Safety of transformers, reactors, power supply units and combinations thereof. Part 2-4. Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers for general applications
Edition 2019-08-29

BS EN IEC 61558-2-6. Safety of transformers, reactors, power supply units and combinations thereof. Part 2-6. Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers for general applications
Edition 2019-08-29

BS EN IEC 61558-2-16. Safety of transformers, reactors, power supply units and combinations thereof. Part 2-16. Particular requirements and tests for switch mode power supply units and transformers for switch mode power supply units for general applications
Edition 2019-08-29