M/495 AMD 2 - Ecodesign Am2

This European Standard gives Ecodesign requirements for small power transformers complying with the EN 61558 series and in relation to Commission Regulation (EU) N° 548/2014 implementing the European Directive 2009/125/EC. This European Standard is applicable to transformers with 50 Hz AC input and output with a rated power of 1 kVA or more and a voltage lower than 1 kV, except those excluded in the regulation. For transformers with a voltage between 1 kV and 1,1 kV, this standard may be used as a guide.

This European Standard applies to new three-phase and single-phase power transformers with a highest voltage for equipment exceeding 36 kV and a rated power equal or higher than 5 kVA, or a rated power equal to or higher than 40 MVA regardless of the highest voltage for equipment. The scope of this European Standard is the following: - Defining the appropriate energy efficiency criteria; - Setting of benchmark minimum efficiency levels for new transformers based on an assessment of the energy efficiency of the European transformer population installed in the last 10 years; - Proposing higher minimum efficiency levels for improving the energy efficiency of new transformers; - Providing guidance for consideration of Total Cost of Ownership. This European Standard provides also a form for efficiency data collection to inform future efficiency benchmark levels. NOTE 1 This standard covers the transformers under the EU Regulation N. 548/2014 and gives additional specific indications for single phase transformers, auto transformers, multi winding transformers and for transformers with OD and OF cooling systems. Transformers considered to be out of the scope of this document are the following: - instrument transformers, specifically designed to supply measuring instruments, meters, relays and other similar apparatus, - transformers with low-voltage windings specifically designed for use with rectifiers to provide a DC supply, - transformers specifically designed to be directly connected to a furnace, - transformers specifically designed for offshore applications and floating offshore applications, - transformers specially designed for emergency installations, - transformers and auto-transformers specifically designed for railway feeding systems, - earthing or grounding transformers, this is, three-phase transformers intended to provide a neutral point for system grounding purposes, - traction transformers mounted on rolling stock, this is, transformers connected to an AC or DC contact line, directly or through a converter, used in fixed installations of railway applications, - starting transformers, specifically designed for starting three-phase induction motors so as to eliminate supply voltage dips, - testing transformers, specifically designed to be used in a circuit to produce a specific voltage or current for the purpose of testing electrical equipment, - welding transformers, specifically designed for use in arc welding equipment or resistance welding equipment, - transformers specifically designed for explosion-proof and underground mining applications, - transformers specifically designed for deep water (submerged) applications, - medium Voltage (MV) to Medium Voltage (MV) interface transformers up to 5 MVA, - large power transformers where it is demonstrated that for a particular application, technically feasible alternatives are not available to meet the minimum efficiency requirements set out by EU REGULATION N. 548/2014, - large power transformers which are like for like replacements in the same physical location/installation for existing large power transformers, where this replacement cannot be achieved without entailing disproportionate costs associated to their transportation and/or installation. For dry type large power transformers Minimum PEI values have been published in European Regulation and these values are included in Annex A. NOTE 2 To retain consistency, the same list of exclusions in the EU Regulation N. 548/2014, has also been reproduced here. Within the above EU exclusion list, some had been excluded simply because no PEI data was available to CENELEC at the time on which to base appropriate PEI levels. Consequently, as such information becomes available in the future, it may be possible to derive suitable PEI Levels. Accordingly these particular categories are listed in Clause 6 as suitable for future consideration.

To improve the definitions of transformers excluded from the COMMISSION REGULATION (EU) No 548/2014 as well as other definitions requiring further clarification

To improve the definitions of transformers excluded from the COMMISSION REGULATION (EU) No 548/2014 as well as any other definition requiring further clarification

This European Standard applies to new three-phase and single-phase power transformers with a highest voltage for equipment exceeding 36 kV and a rated power equal or higher than 5 kVA, or a rated power equal to or higher than 40 MVA regardless of the highest voltage for equipment. The scope of this European Standard is the following: - Defining the appropriate energy efficiency criteria; - Setting of benchmark minimum efficiency levels for new transformers based on an assessment of the energy efficiency of the European transformer population installed in the last 10 years; - Proposing higher minimum efficiency levels for improving the energy efficiency of new transformers; - Providing guidance for consideration of Total Cost of Ownership. This European Standard provides also a form for efficiency data collection to inform future efficiency benchmark levels. NOTE 1 This standard covers the transformers under the EU Regulation N. 548/2014 and gives additional specific indications for single phase transformers, auto transformers, multi winding transformers and for transformers with OD and OF cooling systems. Transformers considered to be out of the scope of this document are the following: - instrument transformers, specifically designed to supply measuring instruments, meters, relays and other similar apparatus, - transformers with low-voltage windings specifically designed for use with rectifiers to provide a DC supply, - transformers specifically designed to be directly connected to a furnace, - transformers specifically designed for offshore applications and floating offshore applications, - transformers specially designed for emergency installations, - transformers and auto-transformers specifically designed for railway feeding systems, - earthing or grounding transformers, this is, three-phase transformers intended to provide a neutral point for system grounding purposes, - traction transformers mounted on rolling stock, this is, transformers connected to an AC or DC contact line, directly or through a converter, used in fixed installations of railway applications, - starting transformers, specifically designed for starting three-phase induction motors so as to eliminate supply voltage dips, - testing transformers, specifically designed to be used in a circuit to produce a specific voltage or current for the purpose of testing electrical equipment, - welding transformers, specifically designed for use in arc welding equipment or resistance welding equipment, - transformers specifically designed for explosion-proof and underground mining applications, - transformers specifically designed for deep water (submerged) applications, - medium Voltage (MV) to Medium Voltage (MV) interface transformers up to 5 MVA, - large power transformers where it is demonstrated that for a particular application, technically feasible alternatives are not available to meet the minimum efficiency requirements set out by EU REGULATION N. 548/2014, - large power transformers which are like for like replacements in the same physical location/installation for existing large power transformers, where this replacement cannot be achieved without entailing disproportionate costs associated to their transportation and/or installation. For dry type large power transformers Minimum PEI values have been published in European Regulation and these values are included in Annex A. NOTE 2 To retain consistency, the same list of exclusions in the EU Regulation N. 548/2014, has also been reproduced here. Within the above EU exclusion list, some had been excluded simply because no PEI data was available to CENELEC at the time on which to base appropriate PEI levels. Consequently, as such information becomes available in the future, it may be possible to derive suitable PEI Levels. Accordingly these particular categories are listed in Clause 6 as suitable for future consideration.

This European Standard covers medium power transformers. ‘Medium power transformer’ means a power transformer with a highest voltage for equipment higher than 1,1 kV, but not exceeding 36 kV and a rated power equal to or higher than 5 kVA but lower than 40 MVA. National practices may require the use of highest voltages for equipment up to (but not including) 52 kV, when the rated voltage is less than 36 kV (such as Um = 38,5 kV or Um = 40,5 kV). This is considered to be an unusual case of a large power transformer, where the requirements are those for a medium power transformer with Um = 36 kV. NOTE 1 ‘Large power transformer’ means a power transformer with a highest voltage for equipment exceeding 36 kV and a rated power equal or higher than 5 kVA, or a rated power equal to or higher than 40 MVA regardless of the highest voltage for equipment. Large power transformers are in the scope of EN 50629. NOTE 2 Transformers with tap changer (DETC or OLTC) are included in this European Standard even if they have separate tapping winding. The object of this European Standard is to set up requirements related to electrical characteristics and design of medium power transformers. The following transformers are excluded from this European Standard: - instrument transformers, specifically designed to supply measuring instruments, meters, relays and other similar apparatus; - transformers with low-voltage windings specifically designed for use with rectifiers to provide a DC supply; - transformers specifically designed to be directly connected to a furnace; - transformers specifically designed for offshore applications and floating offshore applications; - transformers specially designed for emergency installations; - transformers and auto-transformers specifically designed for railway feeding systems; - earthing or grounding transformers, this is, three-phase transformers intended to provide a neutral point for system grounding purposes; - traction transformers mounted on rolling stock, this is, transformers connected to an AC or DC contact line, directly or through a converter, used in fixed installations of railway applications; - starting transformers, specifically designed for starting three-phase induction motors so as to eliminate supply voltage dips; - testing transformers, specifically designed to be used in a circuit to produce a specific voltage or current for the purpose of testing electrical equipment; - welding transformers, specifically designed for use in arc welding equipment or resistance welding equipment; - transformers specifically designed for explosion-proof and underground mining applications, - transformers specifically designed for deep water (submerged) applications; - medium Voltage (MV) to Medium Voltage (MV) interface transformers up to 5 MVA; - large power transformers where it is demonstrated that for a particular application, technically feasible alternatives are not available to meet the minimum efficiency requirements set out by the commission regulation (EU) No 548/2014; - large power transformers which are like for like replacements in the same physical location/installation for existing large power transformers, where this replacement cannot be achieved without entailing disproportionate costs associated to their transportation and/or installation.