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IEC – The company IEC is world-leading organization, which creates and issues International standards for all electrical, electronic and other related technologies known generally as electro-technologies. Wherever, there is electricity and electronics you can find the company IEC, which promotes the safety and performance, the environment, electrical energy efficiency and renewable energy. The company IEC also administers conformity assessment systems, which certify that the equipment, systems or components comply with International Standards of this company.
Power transformers - Part 24: Specification of voltage regulating distribution transformers (VRDT)
(Transformateurs de puissance - Partie 24: Specification des transformateurs de distribution regulateurs de tension (VRDT))
Standard published on 9.7.2020
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Power transformers - Part 25: Neutral grounding resistors
(Transformateurs de puissance - Partie 25: Resistances de mise a la terre du neutre)
Standard published on 23.2.2023
Selected format:Power transformers - Part 26: Functional requirements of insulating liquids for use in power transformers
Standard published on 26.3.2020
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Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air
(Transformateurs de puissance - Partie 3: Niveaux d´isolement, essais dielectriques et distances d´isolement dans l´air)
Standard published on 31.7.2013
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Amendment 1 - Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air
(Amendement 1 - Transformateurs de puissance - Partie 3: Niveaux d´isolement, essais dielectriques et distances d´isolement dans l´air)
Change published on 22.3.2018
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Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air
(Transformateurs de puissance - Partie 3: Niveaux d´isolement, essais dielectriques et distances d´isolement dans l´air)
Standard published on 22.3.2018
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Power transformers - Part 4: Guide to the lightning impulse and switching impulse testing - Power transformers and reactors
(Transformateurs de puissance - Partie 4: Guide pour les essais au choc de foudre et au choc de manoeuvre - Transformateurs de puissance et bobines d´inductance)
Standard published on 6.6.2002
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Power transformers - Part 5: Ability to withstand short circuit
(Transformateurs de puissance - Partie 5: Tenue au court-circuit)
Standard published on 7.2.2006
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Power transformers - Part 57-1202: Liquid immersed phase-shifting transformers
(Transformateurs de puissance - Partie 57-1202: Transformateurs dephaseurs immerges dans un liquide)
Standard published on 23.5.2017
Selected format:Power transformers - Part 57-129: Transformers for HVDC applications
Standard published on 9.11.2017
Selected format:Latest update: 2025-10-24 (Number of items: 2 240 934)
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