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Transformer CE Summary：Transformer CE Test，CE Certification Requirements CE Certification- Common transformer products： Classified by cooling method：Dry type (self-cooling) transformer, oil immersed (self-cooling) transformer, fluoride (evaporation cooling) transformer; Classified by Moistureproof way：Open type transformer, filling type transformer, seal type transformer; Classified by core or coil structure：Core type transformer (chip core, C type core, ferrite core), shell type transformer (chip core, C type core, ferrite core), ring type transformer, metal foil transformer; Classified by power phase number：Single-phase transformer, three-phase transformer, multiphase transformer; Classified by usage：Power transformer, frequency transformer, pulse transformer. EU Regulation/Directive for Transformer CE： LVD 2014/35/EU EMC 2014/30/EU Transformer CE Standard EN 61050:1992 Transformers for tubular discharge lamps having a no-load output voltage exceeding 1 kV (generally called neon-transformers) — General and safety requirements EN 61558-1:2005 Safety of power transformers, power supplies, reactors and similar products — Part 1: General requirements and tests EN 61558-2-1:2007 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 EN 61558-2-1:2007 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 EN 61558-2-3:2010 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 EN 61558-2-4:2009 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V — Part 2-4: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers EN 61558-2-5:2010 Safety of transformers, reactors, power supply units and combinations thereof — Part 2-5: Particular requirements and tests for transformer for shavers, power supply units for shavers and shaver supply units EN 61558-2-6:2009 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V — Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers EN 61558-2-7:2007 Safety of power transformers, power supplies, reactors and similar products — Part 2-7: Particular requirements and tests for transformers and power supplies for toys EN 61558-2-8:2010 Safety of transformers, reactors, power supply units and combinations thereof — Part 2-8: Particular requirements and tests for transformers and power supply units for bells and chimes EN 61558-2-9:2011 Safety of transformers, reactors, power supply units and combinations thereof — Part 2-9: Particular requirements and tests for transformers and power supply units for class III handlamps for tungsten filament lamps EN 61558-2-12:2011 Safety of transformers, reactors, power supply units and combinations thereof — Part 2-12: Particular requirements and tests for constant voltage transformers and power supply units for constant voltage EN 61558-2-13:2009 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V — Part 2-13: Particular requirements and tests for auto transformers and power supply units incorporating auto transformers EN 61558-2-14:2013 Safety of transformers, reactors, power supply units and combination thereof — Part 2-14: Particular requirements and tests for variable transformers and power supply units incorporating variable transformers EN 61558-2-15:2012 Safety of transformers, reactors, power supply units and combinations thereof — Part 2-15: Particular requirements and tests for isolating transformers for the supply of medical locations EN 61558-2-16:2009 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V — Part 2-16: Particular requirements and tests for switch mode power supply units and transformers for switch mode power supply units EN 61558-2-16:2009 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V — Part 2-16: Particular requirements and tests for switch mode power supply units and transformers for switch mode power supply units EN 61558-2-23:2010 Safety of transformers, reactors, power supply units and combinations thereof — Part 2-23: Particular requirements and tests for transformers and power supply units for construction sites EN 61558-2-26:2013 Safety of transformers, reactors, power supply units and combinations thereof — Part 2-26: Particular requirements and tests for transformers and power supply units for saving energy and other purposes Transformer CE Test Item Marking and other information Protection against electric shock Change of input voltage setting Output voltage and output current under load No-load output voltage Short-circuit voltage Heating Short circuit and overload protection Mechanical strength Protection against harmful ingress of dust, solid objects and moisture Insulation resistance, dielectric strength and leakage current Construction Components Internal wiring Supply connection and other external flexible cables or cords Terminals for external conductors Provisions for protective earthing Screws and connections Creepage distances, clearances and distances through insulation Resistance to heat, fire and tracking Resistance to rusting Transformer CE Process 1. Submit specification manual, drawing etc. to confirm the CE standard 2. Send sample test according to applicable CE standard requirement 3. Submit a full set of CE technical files 4. Notified body review all the reports and documents 5. Issue CE certificate 6. Labeled with CE mark, enter EU market CE Label- Transformer 1) CE mark is two semicircles, which can be scaled up or down according to the size of the package 2) The minimum size of CE mark shall not be less than 5mm 3) If the instruction does not specify a specific size, the two letters CE mark must have the same vertical height and must not be less than 5mm 4) The CE mark must be clearly and not easily obliterated 
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