• IEC 60354:1991

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    Loading guide for oil-immersed power transformers

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

    Superseded date:  15-12-2005

    Language(s):  English - French, English, French

    Published date:  15-10-1991

    Publisher:  International Electrotechnical Committee

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

    FOREWORD
    Section 1. General
    1.1 Scope
    1.2 Object
    1.3 Definitions
    1.4 General limitations and effects of loading
          beyond nameplate rating
    1.5 Specific limitations for distribution transformers
    1.6 Specific limitations for medium power transformers
    1.7 Specific limitations for large power transformers
    Section 2. Determination of temperatures
    2.1 Symbols
    2.2 Direct measurement of hot-spot temperature
    2.3 Assumed thermal characteristics
    2.4 Steady-state temperature equations
    2.5 Transient temperature equations
    2.6 Thermal ageing of transformer insulation
    2.7 Ambient temperature
    2.8 Computer program
    Section 3. Loading tables
    3.1 Limitations applicable to loading tables
    3.2 Method of representing an actual load cycle by an
     equivalent two-step rectangular load cycle
    3.3 Normal continuous loading
    3.4 Normal cyclic loading
    3.5 Emergency cyclic loading
    Annexes
    A Equivalent rating for auto-transformers
    B Alternative method for determining the winding
          oil average temperature rise
    C Information to be supplied with enquiry and order
    D Calculation of parameters for sinusoidal variation
          of ambient temperature
    E Example of simplified application of the guide

    Abstract - (Show below) - (Hide below)

    Provides recommendations for the specification and loading of power transformers complying with IEC 60076, from the point of view of operating temperatures and thermal ageing. Gives recommendations for loading above the name-plate rating and guidance for the planner to choose rated quantities for new installations.

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

    Committee TC 14
    Development Note Also numbered as BS 7735(1994) (10/2005) Also numbered as AS 2374.7. (08/2006)
    Document Type Standard
    Publisher International Electrotechnical Committee
    Status Superseded
    Superseded By
    Supersedes

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

    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
    BS 223(1985) : 1985 SPECIFICATION FOR BUSHINGS FOR ALTERNATING VOLTAGES ABOVE 1000 V
    02/205931 DC : DRAFT MAY 2002 IEC 60214-2. ED.1 - TAP CHANGERS - PART 2: APPLICATION GUIDE
    BS IEC 60076-8 : 1997 POWER TRANSFORMERS - APPLICATION GUIDE
    BS 4571(1994) : 1994 ON-LOAD TAP-CHANGERS
    02/207269 DC : 0 IEC 60422 ED.3 - SUPERVISION AND MAINTENANCE GUIDE FOR MINERAL INSULATING OILS IN ELECTRICAL EQUIPMENT
    BS EN 60214 : 1998 ON-LOAD TAP-CHANGERS
    03/100561 DC : DRAFT JULY 2003 IEC 60422 ED.3 - SUPERVISION AND MAINTENANCE GUIDE FOR MINERAL INSULATING OILS IN ELECTRICAL EQUIPMENT
    BS EN 61378-2 : 2001 CONVERTOR TRANSFORMERS - PART 2: TRANSFORMERS FOR HVDC APPLICATIONS
    BS 4571(1978) : 1978 SPECIFICATION FOR ON LOAD TAP CHANGERS
    BS 171-1(1978) : 1978 POWER TRANSFORMERS - GENERAL
    04/30111589 DC : 0
    IEEE C57.119 : 2001 RECOMMENDED PRACTICE FOR PERFORMING TEMPERATURE RISE TESTS ON OIL-IMMERSED POWER TRANSFORMERS AT LOADS BEYOND NAMEPLATE RATINGS
    CEI 14-4/8 : 2001 POWER TRANSFORMERS - APPLICATION GUIDE
    96/205920 DC : 0 PREN 50216-10-1 - POWER TRANSFORMERS AND REACTOR FITTINGS - PART 10: COOLING EQUIPMENT - SECTION 1: REMOVABLE RADIATORS FOR OIL-IMMERSED TRANSFORMERS
    10/30215366 DC : 0 BS EN 60422 - MINERAL INSULATING OILS IN ELECTRICAL EQUIPMENT - SUPERVISION AND MAINTENANCE GUIDANCE
    98/232755 DC : DRAFT DEC 1998 IEC 61936-1 - POWER INSTALLATIONS EXCEEDING 1 KV A.C. - PART 1: COMMON RULES
    04/30117440 DC : DRAFT JUL 2004 IEC 60076-13. ED.1 - POWER TRANSFORMERS - PART 13: SELF-PROTECTED LIQUID FILLED TRANSFORMERS
    BS QC790101(1992) : 1992 HARMONIZED SYSTEM OF QUALITY ASSESSMENT FOR ELECTRONIC COMPONENTS - SEMICONDUCTOR DEVICES - INTEGRATED CIRCUITS - SECTIONAL SPECIFICATION FOR SEMICONDUCTOR INTEGRATED CIRCUITS EXCLUDING HYBRID CIRCUITS - INTERNAL VISUAL EXAMINATION FOR SEMICONDUCTOR INTEGRATED CIRCUITS EXCLUDING HYBRID CIRCUITS
    CEI 14-41 : 2011 TAP-CHANGERS - PART 2: APPLICATION GUIDE
    CEI EN 61378-2 : 2002 CONVERTOR TRANSFORMERS - PART 2: TRANSFORMERS FOR HVDC APPLICATIONS
    IEEE C57.91:2011 GUIDE FOR LOADING MINERAL-OIL-IMMERSED TRANSFORMERS AND STEP-VOLTAGE REGULATORS
    IEC 60076-7:2018 Power transformers - Part 7: Loading guide for mineral-oil-immersed power transformers
    NF EN 50329 : 2005 AMD 1 2011 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - TRACTION TRANSFORMERS
    IEC 60214-2:2004 Tap-changers - Part 2: Application guide
    IEC 60076-8:1997 Power transformers - Part 8: Application guide
    IEC 61378-2:2001 Convertor transformers - Part 2: Transformers for HVDC applications
    11/30253145 DC : 0 BS EN 62271-202 ED2 - HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 202: HIGH-VOLTAGE/LOW-VOLTAGE PREFABRICATED SUBSTATION
    02/714212 DC : DRAFT DEC 2002 IEC 62271-202 ED.1 - HIGH VOLTAGE/LOW VOLTAGE PREFABRICATED SUBSTATIONS
    IEC 61330:1995 High-voltage/low voltage prefabricated substations
    UNE-EN 50329:2004 Railway applications - Fixed installations - Traction transformers
    EN 60214 : 1997 ON-LOAD TAP-CHANGERS
    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 61378-2 : 2001 CONVERTOR TRANSFORMERS - PART 2: TRANSFORMERS FOR HVDC APPLICATIONS
    EN 61330:1996 HIGH-VOLTAGE/LOW-VOLTAGE PREFABRICATED SUBSTATIONS
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