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OVE EN 50708-3-3
Power transformers - Additional European requirements - Part 3-3: Large power transformer - Accessories (english version)
Edition
2023-08-01
ONR 2914542
Durability of wood and wood-based products - Guidelines for the validity of test results from former standards after their revision
Edition
2004-02-01
SN EN 50708-1-2
Power transformers - Additional European requirements: Part 1-2 Common part - Assessment of energy performance
Edition
2021-10
SN EN 50708-2-5
Power transformers - Additional European requirements - Part 2-5: Medium power transformer - Single phase
Edition
2021-08
PR NF C26-310-41 ; PR NF EN IEC 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
PR NF C42-569-20 ; PR NF EN IEC 61869-20
IEC 61869-20 : safety requirements of Instrument Transformers for High Voltage applications
PR NF C52-558-2-1 ; PR NF EN IEC 61558-2-1
Safety of power transformers, power supplies, reactors and similar products - Part 2-1: Particular requirements and tests for separating transformers and power supplies incorporating separating transformers for general applications
PR NF C52-558-2-2 ; PR NF EN IEC 61558-2-2
Safety of power transformers, power supplies, reactors and combinations thereof - Part 2-2: Particular requirements and tests for control transformers and power supplies incorporating control transformers
PR NF C52-558-2-3 ; PR NF EN IEC 61558-2-3
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-3: Particular requirements and tests for ignition transformers for gas and oil burners
PR NF C52-558-2-4 ; PR NF 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