Power transformers - Part 22-7: Power transformer and reactor fittings - Accessories and fittings
Edition 2023-09-27

Power transformers - Part 22-8: Power transformer and reactor fittings - Devices suitable for use in communication networks (Endorsed by Asociación Española de Normalización in October of 2021.)
Edition 2021-10-01

Power transformers - Part 24: Specification of Voltage Regulating Distribution Transformers (VRDT)
Edition 2021-07-28

Power transformers - Part 25: Neutral grounding resistors
Edition 2023-12-05

Measuring relays and protection equipment - Part 187-1: Functional requirements for differential protection - Restrained and unrestrained differential protection of motors, generators and transformers (Endorsed by Asociación Española de Normalización in October of 2021.)
Edition 2021-10-01

Measuring relays and protection equipment - Part 187-1: Functional requirements for differential protection - Restrained and unrestrained differential protection of motors, generators and transformers (Endorsed by Asociación Española de Normalización in June of 2023.)
Edition 2023-06-01

Transformers and inductors for use in electronic and telecommunication equipment - Measuring methods and test procedures (Endorsed by Asociación Española de Normalización in October of 2020.)
Edition 2020-10-01

Transformers and inductors for use in electronic and telecommunication equipment - Measuring methods and test procedures (Endorsed by Asociación Española de Normalización in July of 2021.)
Edition 2021-07-01

Safety of transformers, reactors, power supply units and combinations thereof - Part 1: General requirements and tests
Edition 2021-03-17

Components for low-voltage surge protection - Part 352: Selection and application principles for telecommunications and signalling network surge isolation transformers (SITs) (Endorsed by Asociación Española de Normalización in May of 2018.)
Edition 2018-05-01