• EN 50588-1:2017

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV - Part 1: General requirements

    Available format(s): 

    Superseded date:  23-01-2021

    Language(s): 

    Published date:  15-09-2017

    Publisher:  European Committee for Standards - Electrical

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    Table of Contents - (Show below) - (Hide below)

    European foreword
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Environmental classes
    5 Electrical characteristics
    6 Load loss, no load loss, PEI, sound power level,
       short-circuit impedance
    7 Tolerances
    8 Rating plate
    9 Tests
    10 Design requirements
    11 Accessories
    Annex A (informative) - Calculation of PEI and k[PEI]
    Annex B (informative) - A-deviations
    Annex ZZ (informative) - Relationship between this European
             Standard and the eco-design requirements of Commission
             Regulation (EU) No 548/2014 aimed be covered
    Bibliography

    Abstract - (Show below) - (Hide below)

    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 to 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 2Transformers 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:a)instrument transformers, specifically designed to supply measuring instruments, meters, relays and other similar apparatus;b)transformers with low-voltage windings specifically designed for use with rectifiers to provide a DC supply;c)transformers specifically designed to be directly connected to a furnace;d)transformers specifically designed for offshore applications and floating offshore applications;e)transformers specially designed for emergency installations;f)transformers and auto-transformers specifically designed for railway feeding systems;g)earthing or grounding transformers, this is, three-phase transformers intended to provide a neutral point for system grounding purposes;h)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;i)starting transformers, specifically designed for starting three-phase induction motors so as to eliminate supply voltage dips;j)testing transformers, specifically designed to be used in a circuit to produce a specific voltage or current for the purpose of testing electrical equipment;k)welding transformers, specifically designed for use in arc welding equipment or resistance welding equipment;l)transformers specifically designed for explosion-proof and underground mining applications;m)transformers specifically designed for deep water (submerged) applications;n)medium Voltage (MV) to Medium Voltage (MV) interface transformers up to 5 MVA;o)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;p)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.In case one of the last two exclusions is claimed, this should be documented at the signature of the contract with a declaration made by the customer.NOTE 3This standard covers the transformers under the Commission Regulation (EU) No. 548/2014 and gives additional specific guidance for single phase transformers, multi winding transformers and for transformers with OF or OD cooling systems, necessary for the correct application of energy efficiency requirements to these categories of transformers.

    General Product Information - (Show below) - (Hide below)

    Committee CLC/TC 14
    Development Note Supersedes EN 50464-1 and EN 50541-1. (06/2015)
    Document Type Standard
    Publisher European Committee for Standards - Electrical
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    I.S. EN 50588-2:2018 MEDIUM POWER TRANSFORMERS 50 HZ, WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV - PART 2: TRANSFORMERS WITH CABLE BOXES ON THE HIGH-VOLTAGE AND/OR LOW-VOLTAGE SIDE - GENERAL REQUIREMENTS FOR TRANSFORMERS WITH RATED POWER LESS THAN OR EQUAL TO 3150 KVA
    BS EN 50588-2:2018 (published 2018-04) Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV Transformers with cable boxes on the high-voltage and/or low-voltage side. General requirements for transformers with rated power less than or equal to 3 150 kVA
    EN 50588-2:2018 Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV - Part 2: Transformers with cable boxes on the high-voltage and/or low-voltage side - General requirements for transformers with rated power less than or equal to 3 150 kVA

    Standards Referencing This Book - (Show below) - (Hide below)

    EN 62262:2002 Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code)
    ISO/IEC 17065:2012 Conformity assessment Requirements for bodies certifying products, processes and services
    IEC 60038:2009 IEC standard voltages
    EN 60085:2008 Electrical insulation - Thermal evaluation and designation
    IEC TR 60616:1978 Terminal and tapping markings for power transformers
    EN 50387:2002 Busbar bushings up to 1 kV and from 1,25 kA to 5 kA, for liquid filled transformers
    EN 50464-4 : 2007 AMD 1 2011 THREE-PHASE OIL-IMMERSED DISTRIBUTION TRANSFORMERS 50 HZ, FROM 50 KVA TO 2500 KVA WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV - PART 4: REQUIREMENTS AND TESTS CONCERNING PRESSURISED CORRUGATED TANKS
    EN 61100:1992 Classification of insulating liquids according to fire point and net calorific value
    IEC 61100:1992 Classification of insulating liquids according to fire-point and net calorific value
    EN 61869-1:2009 Instrument transformers - Part 1: General requirements
    EN 50386:2010/A1:2013 BUSHINGS UP TO 1 KV AND FROM 250 A TO 5 KA, FOR LIQUID FILLED TRANSFORMERS
    EN 50464-1 : 2007 AMD 1 2012 THREE-PHASE OIL-IMMERSED DISTRIBUTION TRANSFORMERS 50 HZ, FROM 50 KVA TO 2500 KVA WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV - PART 1: GENERAL REQUIREMENTS
    IEC 60505:2011 Evaluation and qualification of electrical insulation systems
    IEC 60085:2007 Electrical insulation - Thermal evaluation and designation
    EN 50180:2010 Bushings above 1 kV up to 52 kV and from 250 A to 3,15 kA for liquid filled transformers – Part 1: General requirements for bushings
    EN 50329:2003/A1:2010 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - TRACTION TRANSFORMERS
    EN ISO 9001:2015 Quality management systems - Requirements (ISO 9001:2015)
    IEC 60529:1989+AMD1:1999+AMD2:2013 CSV Degrees of protection provided by enclosures (IP Code)
    IEC 60076-1:2011 Power transformers - Part 1: General
    IEC 60076-6:2007 Power transformers - Part 6: Reactors
    EN ISO/IEC 17065:2012 Conformity assessment - Requirements for bodies certifying products, processes and services (ISO/IEC 17065:2012)
    IEC 62262:2002 Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code)
    EN 60076-1:2011 POWER TRANSFORMERS - PART 1: GENERAL (IEC 60076-1:2011)
    ISO 9001:2015 Quality management systems - Requirements
    EN 50181:2010 Plug-in type bushings above 1 kV up to 52 kV and from 250 A to 2,50 kA for equipment other than liquid filled transformers
    EN 60529:1991/AC:2016-12 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE) (IEC 60529 EDITION 2.2 CORRIGENDUM 2:2015)
    EN 61378-1:2011 Convertor transformers - Part 1: Transformers for industrial applications
    EN 60505:2011/AC:2017-03 EVALUATION AND QUALIFICATION OF ELECTRICAL INSULATION SYSTEMS (IEC 60505:2011/COR1:2017)
    IEC 61378-1:2011 Converter transformers - Part 1: Transformers for industrial applications
    EN 60038 : 2011 CENELEC STANDARD VOLTAGES (IEC 60038:2009, MODIFIED)
    EN 60076-6:2008 Power transformers - Part 6: Reactors
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