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  • IEC 60076-3:2013

    Current The latest, up-to-date edition.

    Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  Spanish, Castilian

    Published date:  31-07-2013

    Publisher:  International Electrotechnical Committee

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    Abstract - (Show below) - (Hide below)

    IEC 60076-3:2013 specifies the insulation requirements and the corresponding insulation tests with reference to specific windings and their terminals. This International Standard applies to power transformers as defined by IEC 60076-1. It also recommends external clearances in air. It gives details of the applicable dielectric tests and minimum dielectric test levels. Recommended minimum external clearances in air between live parts and between live parts and earth are given for use when these clearances are not specified by the purchaser. For categories of power transformers and reactors which have their own IEC standards, this standard is applicable only to the extent in which it is specifically called up by cross reference in the other standards. This third edition of IEC 60076-3 cancels and replaces the second edition published in 2000, and constitutes a technical revision. The main changes from the previous edition are as follows:
    - Three categories of transformer are clearly identified together with the relevant test requirements, these are summarised in Table 1.
    - Switching impulse levels are defined for values of Um > 72,5 kV.
    - The procedure for Induced voltage tests with PD has been revised to ensure adequate phase to phase test voltages.
    - The AC withstand test has been redefined (LTAC instead of ACSD).
    - Induced voltage tests are now based on Ur rather than Um. - New requirements for impulse waveshape (k factor) have been introduced.
    - Tables of test levels have been merged and aligned with IEC 60071-1:2010.
    - Additional test levels have been introduced for Um > 800 kV.
    - A new Annex E has been introduced, which sets out the principles used in assigning the tests, test levels and clearances in air.

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

    Committee TC 14
    Document Type Standard
    Publisher International Electrotechnical Committee
    Status Current
    Supersedes

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

    BS EN 60076-11:2004 POWER TRANSFORMERS - PART 11: DRY-TYPE TRANSFORMERS
    BS IEC 60076-15:2015 Power transformers Gas-filled power transformers
    IEEE C57.21 : 2008 REQUIREMENTS, TERMINOLOGY, AND TEST CODE FOR SHUNT REACTORS RATED OVER 500 KVA
    BS EN 60076-13:2006 Power transformers Self-protected liquid-filled transformers
    15/30324519 DC : 0 BS EN ISO 14224 - PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - COLLECTION AND EXCHANGE OF RELIABILITY AND MAINTENANCE DATA FOR EQUIPMENT
    09/30187488 DC : DRAFT AUG 2009 BS EN 60076-16 - POWER TRANSFORMERS - PART 16: TRANSFORMERS FOR WIND TURBINES APPLICATION
    BS EN 50329 : 2003 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - TRACTION TRANSFORMERS
    CEI EN 60076-11 : 2006 POWER TRANSFORMERS - PART 11: DRY-TYPE TRANSFORMERS
    I.S. EN 60726:2003 DRY-TYPE POWER TRANSFORMERS
    NF EN 50299-2 : 2015 OIL-IMMERSED CABLE CONNECTION ASSEMBLIES FOR TRANSFORMERS AND REACTORS HAVING HIGHEST VOLTAGE FOR EQUIPMENT UM FROM 72,5 KV TO 550 KV - PART 2: DRY-TYPE CABLE TERMINATIONS
    UNE-EN 50541-1:2012 Three phase dry-type distribution transformers 50 Hz, from 100 kVA to 3 150 kVA, with highest voltage for equipment not exceeding 36 kV - Part 1: General requirements
    UNE-EN 61378-1:2012 Convertor transformers -- Part 1: Transformers for industrial applications
    12/30263868 DC : 0 BS EN 60076-14 - POWER TRANSFORMERS - PART 14: LIQUID-IMMERSED POWER TRANSFORMERS USING HIGH-TEMPERATURE INSULATION MATERIALS
    CEI 14-4/8 : 2001 POWER TRANSFORMERS - APPLICATION GUIDE
    PD IEC/TR 63042-100:2016 UHV AC transmission systems General information
    07/30167951 DC : 0 BS EN 60076-1 - POWER TRANSFORMERS - PART 1: GENERAL
    BS EN 60310:2016 Railway applications. Traction transformers and inductors on board rolling stock
    CEI EN 61378-2 : 2002 CONVERTOR TRANSFORMERS - PART 2: TRANSFORMERS FOR HVDC APPLICATIONS
    I.S. EN 60076-11:2004 POWER TRANSFORMERS - PART 11: DRY-TYPE TRANSFORMERS
    IEEE 1277 : 2010 GENERAL REQUIREMENTS AND TEST CODE FOR DRY-TYPE AND OIL-IMMERSED SMOOTHING REACTORS FOR DC POWER TRANSMISSION
    I.S. EN 60137:2017 INSULATED BUSHINGS FOR ALTERNATING VOLTAGES ABOVE 1000 V
    I.S. EN 62271-212:2017 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 212: COMPACT EQUIPMENT ASSEMBLY FOR DISTRIBUTION SUBSTATION (CEADS)
    IEC 61378-3:2015 Converter transformers - Part 3: Application guide
    IEC 60137 REDLINE : 7ED 2017 INSULATED BUSHINGS FOR ALTERNATING VOLTAGES ABOVE 1000 V
    NF EN 60076-16 : 2012 POWER TRANSFORMERS - PART 16: TRANSFORMERS FOR WIND TURBINES APPLICATION
    NF EN 60076-13 : 2007 POWER TRANSFORMERS - PART 13: SELF-PROTECTED LIQUID-FILLED TRANSFORMERS
    IEC TS 60076-14:2009 Power transformers - Part 14: Design and application of liquid-immersed power transformers using high-temperature insulation materials
    UNE-EN 62271-212:2017 High-voltage switchgear and controlgear - Part 212: Compact Equipment Assembly for Distribution Substation (CEADS)
    11/30253145 DC : 0 BS EN 62271-202 ED2 - HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 202: HIGH-VOLTAGE/LOW-VOLTAGE PREFABRICATED SUBSTATION
    EN 60214:1997 On-load tap-changers
    EN 60076-11:2004 Power transformers - Part 11: Dry-type transformers
    EN 50541-1:2011 Three phase dry-type distribution transformers 50 Hz, from 100 kVA to 3 150 kVA, with highest voltage for equipment not exceeding 36 kV - Part 1: General requirements
    EN 62271-212:2017 High-voltage switchgear and controlgear - Part 212: Compact Equipment Assembly for Distribution Substation (CEADS)
    EN 62271-202:2014/AC:2014 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 202: HIGH-VOLTAGE/LOW-VOLTAGE PREFABRICATED SUBSTATION (IEC 62271-202:2014)
    EN 61378-1:2011 Convertor transformers - Part 1: Transformers for industrial applications
    EN 60289:1994/A11:2002 REACTORS
    EN 60726:2003 Dry-type power transformers
    BS IEC 60076-8:1997 Power transformers Application guide
    16/30336914 DC : 0 BS EN 60076-57-129 ED 1.0 - CONVERTOR TRANSFORMERS - PART 57-129: TRANSFORMERS FOR HVDC APPLICATIONS
    02/205931 DC : DRAFT MAY 2002 IEC 60214-2. ED.1 - TAP CHANGERS - PART 2: APPLICATION GUIDE
    13/30256030 DC : 0 BS IEC 62695 ED 1.0 - RAILWAY APPLICATIONS - FIXED INSTALLATIONS - TRACTION TRANSFORMERS
    CEI EN 60076-5 : 2007 POWER TRANSFORMERS - PART 5: ABILITY TO WITHSTAND SHORT CIRCUIT
    CEI CLC/TS 50458 : 2006 CAPACITANCE GRADED OUTDOOR BUSHING 52 KV UP TO 420 KV FOR OIL IMMERSED TRANSFORMERS
    BS 7806:1995 DRY-TYPE POWER TRANSFORMERS
    I.S. EN 60076-13:2006 POWER TRANSFORMERS - PART 13: SELF-PROTECTED LIQUID-FILLED TRANSFORMERS
    BS EN 60076-6:2008 Power transformers Reactors
    BS EN 50541-1:2011 Three phase dry-type distribution transformers 50 Hz, from 100 kVA to 3150 kVA, with highest voltage for equipment not exceeding 36 kV General requirements
    02/211941 DC : 0 IEC 60076-14 ED.1 - GUIDE FOR THE DESIGN AND APPLICATION OF LIQUID-IMMERSED POWER TRANSFORMERS USING HIGH-TEMPERATURE INSULATION MATERIALS
    BS IEC 61378-3:2015 Converter transformers Application guide
    08/30178668 DC : DRAFT FEB 2008 BS EN 61378-1 - CONVERTER TRANSFORMERS - PART 1: TRANSFORMERS FOR INDUSTRIAL APPLICATIONS
    CEI EN 50299-2 : 2016 OIL-IMMERSED CABLE CONNECTION ASSEMBLIES FOR TRANSFORMERS AND REACTORS HAVING HIGHEST VOLTAGE FOR EQUIPMENT UM FROM 72,5 KV TO 550 KV - PART 2: DRY-TYPE CABLE TERMINATIONS
    NF EN 60289 : 96 AMD 11 2002 REACTORS
    CEI EN 60076-16 : 2012 POWER TRANSFORMERS - PART 16: TRANSFORMERS FOR WIND TURBINES APPLICATIONS
    CEI EN 60076-4 : 2003 POWER TRANSFORMERS - PART 4: GUIDE TO LIGHTNING IMPULSE AND SWITCHING IMPULSE TESTING - POWER TRANSFORMERS AND REACTORS
    CEI 14-41 : 2011 TAP-CHANGERS - PART 2: APPLICATION GUIDE
    IEC 60092-303:1980 Electrical installations in ships - Part 303: Equipment - Transformers for power and lighting
    EN 50588-4:2018 Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV - Part 4: Transformers with cable boxes on the high-voltage and/or low-voltage side - Cable boxes type 2 for use on transformers meeting the requirements of EN 50588-2
    IEEE C37.302 : 2015 FAULT CURRENT LIMITER (FCL) TESTING OF FCLS RATED ABOVE 1000 V AC
    BS EN 60137:2017 INSULATED BUSHINGS FOR ALTERNATING VOLTAGES ABOVE 1000 V
    I.S. EN 60076-5:2006 POWER TRANSFORMERS - PART 5: ABILITY TO WITHSTAND SHORT-CIRCUIT
    I.S. EN 62271-202:2014 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 202: HIGH-VOLTAGE/LOW-VOLTAGE PREFABRICATED SUBSTATION
    CEI 14-42 : 2011 CONVERTER TRANSFORMERS - PART 3: APPLICATION GUIDE
    CEI EN 61378-1 : 2012 CONVERTOR TRANSFORMERS - PART 1: TRANSFORMERS FOR INDUSTRIAL APPLICATIONS
    NF EN 60076-6 : 2008 POWER TRANSFORMERS - PART 6: REACTORS
    NF EN 50329 : 2005 AMD 1 2011 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - TRACTION TRANSFORMERS
    UNE-EN 50299-2:2015 Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72,5 kV to 550 kV - Part 2: Dry-type cable terminations
    I.S. EN 60076-4:2002 POWER TRANSFORMERS - PART 4: GUIDE TO THE LIGHTNING IMPULSE AND SWITCHING IMPULSE TESTING - POWER TRANSFORMERS AND REACTORS
    15/30297998 DC : 0 BS EN 62271-212 ED 1.0 - HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 212: COMPACT EQUIPMENT ASSEMBLY FOR DISTRIBUTION SUBSTATION (CEADS)
    17/30354643 DC : 0 BS EN 62933-2-1 - ELECTRIC ENERGY STORAGE (ESS) SYSTEMS - PART 2-1: UNIT PARAMETERS AND TESTING METHODS - GENERAL SPECIFICATION
    I.S. EN ISO 14224:2016 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - COLLECTION AND EXCHANGE OF RELIABILITY AND MAINTENANCE DATA FOR EQUIPMENT (ISO 14224:2016)
    IEC 60137:2017 RLV Insulated bushings for alternating voltages above 1000 V
    BS 4571:1994 ON-LOAD TAP-CHANGERS
    VDE 0532-20 : 1994 REACTORS
    VDE 0532-42 : 2001 CONVERTOR TRANSFORMERS - PART 2: TRANSFORMERS FOR HVDC APPLICATIONS
    BS IEC 60092-303:1980 ELECTRICAL INSTALLATION IN SHIPS - PART 303: EQUIPMENT - TRANSFORMERS FOR POWER AND LIGHTING
    17/30331680 DC : 0 BS ISO 18095 - CONDITION MONITORING AND DIAGNOSTICS OF POWER TRANSFORMERS
    13/30265253 DC : 0 BS EN 60214-1 ED 2 - TAP-CHANGERS - PART 1: PERFORMANCE REQUIREMENTS AND TEST METHODS
    UNE-EN 60137:2011 Insulated bushings for alternating voltages above 1 000 V
    UTEC 66 558 : 2006 CAPACITANCE GRADED OUTDOOR BUSHING 52 KV UP TO 420 KV FOR OIL IMMERSED TRANSFORMERS
    BS EN 50299-2:2014 OIL-IMMERSED CABLE CONNECTION ASSEMBLIES FOR TRANSFORMERS AND REACTORS HAVING HIGHEST VOLTAGE FOR EQUIPMENT UM FROM 72,5 KV TO 550 KV - PART 2: DRY-TYPE CABLE TERMINATIONS
    BS EN 60214:1998 ON-LOAD TAP-CHANGERS
    BS EN 60214-1:2014 Tap-changers Performance requirements and test methods
    IEEE 1861 : 2014 GUIDE FOR ON-SITE ACCEPTANCE TESTS OF ELECTRICAL EQUIPMENT AND SYSTEM COMMISSIONING OF 1000 KV AC AND ABOVE
    BS EN 60076-1:2011 Power transformers General
    CEI EN 50541-1 : 2011 THREE PHASE DRY-TYPE DISTRIBUTION TRANSFORMERS 50 HZ, FROM 100 KVA TO 3150 KVA, WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV - PART 1: GENERAL REQUIREMENTS
    14/30271248 DC : 0 BS EN 60310 ED 4.0 - RAILWAY APPLICATIONS - TRACTION TRANSFORMERS AND INDUCTORS ON BOARD ROLLING STOCK
    04/30111589 DC : 0
    BS EN 50327:2003 Railway applications. Fixed installations. Harmonisation of the rated values for converter groups and tests on converter groups
    17/30357121 DC : 0 PD IEC/TS 60076-23 ED.1.0 - POWER TRANSFORMERS - PART 23: SUPPRESSION DEVICES OF DC MAGNETIC BIAS OF ELECTRIC POWER TRANSFORMERS
    05/30133866 DC : DRAFT MAY 2005 IEC 60076-6 - POWER TRANSFORMERS - PART 6: REACTORS
    IEC TS 60076-23:2018 Power transformers - Part 23: DC magnetic bias suppression devices
    IEC/IEEE 60076-57-129:2017 Power transformers - Part 57-129: Transformers for HVDC applications
    BS EN 60289:1995 REACTORS
    EN IEC 62933-2-1:2018 Electrical energy storage (EES) systems - Part 2-1: Unit parameters and testing methods - General specification
    I.S. EN 60310:2016 RAILWAY APPLICATIONS - TRACTION TRANSFORMERS AND INDUCTORS ON BOARD ROLLING STOCK
    I.S. EN 50541-1:2011 THREE PHASE DRY-TYPE DISTRIBUTION TRANSFORMERS 50 HZ, FROM 100 KVA TO 3150 KVA, WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV - PART 1: GENERAL REQUIREMENTS
    PREN 50541-1 : DRAFT 2009 THREE PHASE DRY-TYPE DISTRIBUTION TRANSFORMERS 50 HZ, FROM 100 TO 3150 KVA, WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV - PART 1: GENERAL REQUIREMENTS AND REQUIREMENTS FOR DRY TYPE TRANSFORMERS WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV
    IEC 62695:2014 Railway applications - Fixed installations - Traction transformers
    I.S. EN 60076-6:2008 POWER TRANSFORMERS - PART 6: REACTORS
    IEC 62032:2012 Guide for the Application, Specification and Testing of Phase-Shifting Transformers
    IEC 62933-2-1:2017 Electrical energy storage (EES) systems - Part 2-1: Unit parameters and testing methods - General specification
    IEC 61378-2:2001 Convertor transformers - Part 2: Transformers for HVDC applications
    UNE-EN 62271-202:2015 High-voltage switchgear and controlgear - Part 202: High-voltage/low-voltage prefabricated substation
    IEC 60076-13:2006 Power transformers - Part 13: Self-protected liquid-filled transformers
    IEC 61800-4:2002 Adjustable speed electrical power drive systems - Part 4: General requirements - Rating specifications for a.c. power drive systems above 1 000 V a.c. and not exceeding 35 kV
    ISO 14224:2016 Petroleum, petrochemical and natural gas industries Collection and exchange of reliability and maintenance data for equipment
    I.S. HD 428.1:1992 THREE PHASE OIL-IMMERSED DISTRIBUTION TRANSFORMERS, 50 HZ, FROM 50 TO 2500 KVA WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV - PART 1: GENERAL REQUIREMENTS AND REQUIREMENTS FOR TRANSFORMERS WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 24 KV
    DD IEC TS 60076-14 : DRAFT 2009 POWER TRANSFORMERS - PART 14: DESIGN AND APPLICATION OF LIQUID-IMMERSED POWER TRANSFORMERS USING HIGH-TEMPERATURE INSULATION MATERIALS
    BS EN 61800-4:2003 Adjustable speed electrical power drive systems General requirements. Rating specifications for a.c. power drive systems above 1000 V a.c. and not exceeding 35 kV
    NF EN 60214-1 : 2015 TAP-CHANGERS - PART 1: PERFORMANCE REQUIREMENTS AND TEST METHODS
    BS EN 60076-5:2006 Power transformers Ability to withstand short-circuit
    BS EN 60076-4:2002 Power transformers Guide to the lightning impulse and switching impulse testing. Power transformers and reactors
    BS EN 61378-1:2011 Convertor transformers Transformers for industrial applications
    BS EN 60076-16:2011 (published 2011-11) Power transformers Transformers for wind turbines applications
    UNE-EN 60076-16:2012 Power transformers - Part 16: Transformers for wind turbines applications
    BS EN 60726:2003 Dry-type power transformers
    16/30318517 DC : 0 BS EN 60137 ED. 7.0 - INSULATED BUSHINGS FOR ALTERNATING VOLTAGES ABOVE 1000 V
    EN 60137:2017 Insulated bushings for alternating voltages above 1 000 V
    IEEE C57.124 : 1991 RECOMMENDED PRACTICE FOR THE DETECTION OF PARTIAL DISCHARGE AND THE MEASUREMENT OF APPARENT CHARGE IN DRY-TYPE TRANSFORMERS
    I.S. EN 50299-2:2014 OIL-IMMERSED CABLE CONNECTION ASSEMBLIES FOR TRANSFORMERS AND REACTORS HAVING HIGHEST VOLTAGE FOR EQUIPMENT UM FROM 72,5 KV TO 550 KV - PART 2: DRY-TYPE CABLE TERMINATIONS
    ISO 18095:2018 Condition monitoring and diagnostics of power transformers
    CEI EN 60076-1 : 2015 POWER TRANSFORMERS - PART 1: GENERAL
    I.S. EN 50588-4:2018 MEDIUM POWER TRANSFORMERS 50 HZ, WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV - PART 4: TRANSFORMERS WITH CABLE BOXES ON THE HIGH-VOLTAGE AND/OR LOW-VOLTAGE SIDE - CABLE BOXES TYPE 2 FOR USE ON TRANSFORMERS MEETING THE REQUIREMENTS OF EN 50588-2
    CEI EN 60076-6 : 2015 POWER TRANSFORMERS - PART 6: REACTORS
    IEC 60214-2:2004 Tap-changers - Part 2: Application guide
    IEC 60076-8:1997 Power transformers - Part 8: Application guide
    IEC 60076-15:2015 Power transformers - Part 15: Gas-filled power transformers
    IEC TR 63042-100:2016 UHV AC transmission systems - Part 100: General information
    IEC 60076-4:1976 Power transformers - Part 4: Tappings and connections
    BS EN 62271-212:2017 High-voltage switchgear and controlgear Compact Equipment Assembly for Distribution Substation (CEADS)
    IEC 61378-1:2011 Converter transformers - Part 1: Transformers for industrial applications
    UNE-EN 60076-1:2013 Power transformers - Part 1: General
    IEC 60076-6:2007 Power transformers - Part 6: Reactors
    IEC 60076-1:2011 Power transformers - Part 1: General
    IEC 62271-212:2016 High-voltage switchgear and controlgear - Part 212: Compact Equipment Assembly for Distribution Substation (CEADS)
    IEC 60076-5:2006 Power transformers - Part 5: Ability to withstand short circuit
    IEC 62271-202:2014 High-voltage switchgear and controlgear - Part 202: High-voltage/ low-voltage prefabricated substation
    UNE-EN 50532:2011 Compact Equipment Assembly for Distribution Substations (CEADS)
    IEC 60310:2016 Railway applications - Traction transformers and inductors on board rolling stock
    IEC 60214-1:2014 Tap-changers - Part 1: Performance requirements and test methods
    EN 60076-16:2011 Power transformers - Part 16: Transformers for wind turbines applications
    09/30211604 DC : 0 BS EN 50541-1 - THREE PHASE DRY-TYPE DISTRIBUTION TRANSFORMERS 50 HZ, FROM 100 TO 3150 KVA, WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV - PART 1: GENERAL REQUIREMENTS AND REQUIREMENTS FOR DRY TYPE TRANSFORMERS WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV
    FM 3990 : 2018 LESS OR NONFLAMMABLE LIQUID-INSULATED TRANSFORMERS
    CEI EN 60076-13 : 2007 POWER TRANSFORMERS - PART 13: SELF PROTECTED LIQUID FILLED TRANSFORMERS
    IEC 60076-3-1:1987 Power transformers. Part 3: Insulation levels and dielectric tests - External clearances in air
    BS EN 61378-2:2001 CONVERTOR TRANSFORMERS - PART 2: TRANSFORMERS FOR HVDC APPLICATIONS
    CEI EN 60310 : 2016 RAILWAY APPLICATIONS - TRACTION TRANSFORMERS AND INDUCTORS ON BOARD ROLLING STOCK
    13/30281716 DC : 0 BS EN 50299-2 - OIL-IMMERSED CABLE CONNECTION ASSEMBLIES FOR TRANSFORMERS AND REACTORS HAVING HIGHEST VOLTAGE FOR EQUIPMENT U[M] FROM 72,5 KV TO 550 KV - PART 2: DRY-TYPE CABLE TERMINATIONS
    12/30275045 DC : 0 BS EN 60076-15 - POWER TRANSFORMERS - PART 15: GAS-FILLED POWER TRANSFORMER
    16/30349321 DC : 0 BS EN 60076-11 ED 2.0 - POWER TRANSFORMERS - PART 11: DRY-TYPE TRANSFORMERS
    IEC 60137:2017 Insulated bushings for alternating voltages above 1000 V
    04/30117440 DC : DRAFT JUL 2004 IEC 60076-13. ED.1 - POWER TRANSFORMERS - PART 13: SELF-PROTECTED LIQUID FILLED TRANSFORMERS
    API 689 : 2007 COLLECTION AND EXCHANGE OF RELIABILITY AND MAINTENANCE DATA FOR EQUIPMENT
    I.S. EN 60076-16:2011 POWER TRANSFORMERS - PART 16: TRANSFORMERS FOR WIND TURBINES APPLICATIONS (IEC 60076-16:2011)
    I.S. EN IEC 62933-2-1:2018 ELECTRICAL ENERGY STORAGE (EES) SYSTEMS - PART 2-1: UNIT PARAMETERS AND TESTING METHODS - GENERAL SPECIFICATION
    IEEE C57.129-2007 GENERAL REQUIREMENTS AND TEST CODE FOR OIL-IMMERSED HVDC CONVERTER TRANSFORMERS
    IEEE C57.135 : 2011 GUIDE FOR THE APPLICATION, SPECIFICATION, AND TESTING OF PHASE-SHIFTING TRANSFORMERS
    I.S. EN 50329:2007 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - TRACTION TRANSFORMERS
    I.S. EN 60076-1:2011 POWER TRANSFORMERS - PART 1: GENERAL (IEC 60076-1:2011)
    I.S. EN 61378-1:2011 CONVERTOR TRANSFORMERS - PART 1: TRANSFORMERS FOR INDUSTRIAL APPLICATIONS (IEC 61378-1:2011)
    CEI EN 60137 : 2009 INSULATED BUSHINGS FOR ALTERNATING VOLTAGES ABOVE 1000 V
    UNE-EN 60214-1:2015 Tap-changers - Part 1: Performance requirements and test methods
    CEI EN 61800-4 : 2003 ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 4: GENERAL REQUIREMENTS - RATING SPECIFICATIONS FOR A/C/ POWER DRIVE SYSTEMS ABOVE 1000 V A.C. AND NOT EXCEEDING 35 KV
    I.S. EN 60214-1:2014 TAP-CHANGERS - PART 1: PERFORMANCE REQUIREMENTS AND TEST METHODS
    I.S. EN 61800-4:2003 ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 4: GENERAL REQUIREMENTS - RATING SPECIFICATIONS FOR A.C. POWER DRIVE SYSTEMS ABOVE 1000 V A.C. AND NOT EXCEEDING 35 KV
    IEC 60076-16:2011 Power transformers - Part 16: Transformers for wind turbine applications
    BS EN ISO 14224:2016 Petroleum, petrochemical and natural gas industries. Collection and exchange of reliability and maintenance data for equipment
    BS EN 62271-202:2014 High-voltage switchgear and controlgear High-voltage/low-voltage prefabricated substation
    HD 428.1 S1:1992/AC:2011 THREE PHASE OIL-IMMERSED DISTRIBUTION TRANSFORMERS, 50 HZ, FROM 50 TO 2500 KVA WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV - PART 1: GENERAL REQUIREMENTS AND REQUIREMENTS FOR TRANSFORMERS WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 24 KV
    EN 50327 : 2003 AMD 1 2005 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - HARMONISATION OF THE RATED VALUES FOR CONVERTER GROUPS AND TESTS ON CONVERTER GROUPS
    EN 61378-2:2001 Convertor transformers - Part 2: Transformers for HVDC applications
    EN 50329:2003/A1:2010 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - TRACTION TRANSFORMERS
    EN 60076-6:2008 Power transformers - Part 6: Reactors
    EN 60076-13 : 2006 POWER TRANSFORMERS - PART 13: SELF-PROTECTED LIQUID-FILLED TRANSFORMERS
    EN 50299-2:2014 Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72,5 kV to 550 kV - Part 2: Dry-type cable terminations
    EN 60076-4:2002 Power transformers - Part 4: Guide to the lightning impulse and switching impulse testing - Power transformers and reactors
    EN 61800-4 : 2003 Adjustable speed electrical power drive systems - Part 4: General requirements - Rating specifications for a.c. power drive systems above 1 000 V a.c. and not exceeding 35 kV
    EN 60076-5:2006 Power transformers - Part 5: Ability to withstand short-circuit
    EN 60214-1:2014 Tap-changers - Part 1: Performance requirements and test methods
    EN 60076-1:2011 POWER TRANSFORMERS - PART 1: GENERAL (IEC 60076-1:2011)
    EN 60310:2016/AC:2018-03 RAILWAY APPLICATIONS - TRACTION TRANSFORMERS AND INDUCTORS ON BOARD ROLLING STOCK (IEC 60310:2016/COR1:2018)
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