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  • IEEE C37.09-1999

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis

    Available format(s):  PDF

    Superseded date:  16-04-2019

    Language(s): 

    Published date:  28-03-2000

    Publisher:  Institute of Electrical & Electronics Engineers

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

    1. Scope
    2. References
    3. Definitions
    4. Design tests
       4.1 Maximum voltage tests
       4.2 Power frequency tests
       4.3 Continuous current-carrying tests
       4.4 Dielectric withstand tests
       4.5 Standard operating duty (standard duty cycle) tests
       4.6 Interrupting time tests
       4.7 TRV tests
       4.8 Short-circuit current interrupting tests
       4.9 Load current
       4.10 Capacitor switching current tests
       4.11 Line closing switching surge factor
       4.12 Out-of-phase switching current tests
       4.13 Mechanical endurance tests
       4.14 Control voltage
       4.15 Fluid operating pressure
       4.16 Design tests on pressurized components
       4.17 Sealed pressure systems leakage tests
    5. Production tests
       5.1 Types of tests
       5.2 Current and linear coupler transformer tests
       5.3 High-voltage circuit breaker bushings tests
       5.4 Gas receiver tests
       5.5 Pressure tests
       5.6 Nameplate check
       5.7 Leakage tests
       5.8 Vacuum integrity tests
       5.9 Resistors, heaters, and coils check tests
       5.10 Control and secondary wiring check tests
       5.11 Clearance and mechanical adjustment check tests
       5.12 Mechanical operation tests
       5.13 Timing tests
       5.14 Stored energy system tests
       5.15 Electrical resistance of current path test
       5.16 Power-frequency withstand voltage tests on major
            insulation components
       5.17 Power-frequency withstand voltage tests on control
            and secondary wiring
    6. Conformance test
       6.1 Outdoor circuit breakers
       6.2 Indoor circuit breakers
    7. Standard methods for determining the values of a sinusoidal
       current wave and a power-frequency recovery voltage
       7.1 Currents
       7.2 Power-frequency recovery voltage
    Annex A (informative) - Records and reports of type tests for
                            making, breaking and short-time current
                            performance
    Annex B (informative) - Test tables from C37.09-1979

    Abstract - (Show below) - (Hide below)

    Summarizes the various tests that are made on ac high voltage indoor and outdoor circuit breakers, except for generator circuit breakers, which are covered in IEEE Std C37.013-1997. Also describes accepted methods used in making the tests and specifies the tests that will verify assigned ratings under ANSI/IEEE standards.

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

    Committee Switchgear
    Development Note Supersedes IEEE DRAFT C37.09. (06/2000) Amendment 1 to IEEE C37.09 is available separately, see IEEE C37.09A. (09/2005) Amendment 2 to IEEE C37.09 is available separately, see IEEE C37.09B. (06/2011) NEW CHILD ERR 1 IS NOW ADDED
    Document Type Standard
    Product Note NEW CHILD COR 1 IS NOW ADDED NEW CHILD ERR 1 IS NOW ADDED
    Publisher Institute of Electrical & Electronics Engineers
    Status Superseded
    Superseded By
    Supersedes

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

    IEEE C37.73-1998 IEEE Standard Requirements for Pad-Mounted Fused Switchgear
    IEEE C37.017-2010 IEEE Standard for Bushings for High-Voltage [over 1000 V (ac)] Circuit Breakers and Gas-Insulated Switchgear
    IEEE C37.016-2006 IEEE Standard for AC High Voltage Circuit Switchers rated 15.5kV through 245kV
    BS IEC/IEEE 62271-37-013:2015 High-voltage switchgear and controlgear Alternating-current generator circuit-breakers
    14/30257408 DC : 0 BS IEC/IEEE 62271-37-013 ED 1.0 - HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 37-013: ALTERNATING-CURRENT GENERATOR CIRCUIT-BREAKERS
    IEEE 386-2016 REDLINE IEEE Standard for Separable Insulated Connector Systems for Power Distribution Systems Rated 2.5 kV through 35 kV
    IEEE C57.12.44-2014 IEEE Standard Requirements for Secondary Network Protectors
    CSA C62155 : 2006 : R2015 HOLLOW PRESSURIZED AND UNPRESSURIZED CERAMIC AND GLASS INSULATORS FOR USE IN ELECTRICAL EQUIPMENT WITH RATED VOLTAGES GREATER THAN 1000 V
    IEEE C37.122.1-2014 REDLINE IEEE Guide for Gas-Insulated Substations Rated Above 52 kV
    IEEE C37.100.2-2018 IEEE Standard for Common Requirements for Testing of AC Capacitive Current Switching Devices over 1000 V
    IEEE C37.20.2-2015 IEEE Standard for Metal-Clad Switchgear
    IEEE DRAFT 386 : D2.3 2006 SEPARABLE INSULATED CONNECTOR SYSTEMS FOR POWER DISTRIBUTION SYSTEMS ABOVE 600 V
    IEEE 693-2005 IEEE Recommended Practice for Seismic Design of Substations
    CSA C22.2 No. 241 : 0 IEEE STANDARD FOR CABLE JOINTS FOR USE WITH EXTRUDED DIELECTRIC CABLE RATED 5000-138000 V AND CABLE JOINTS FOR USE WITH LAMINATED DIELECTRIC CABLE RATED 2500-500000 V
    IEEE C37.23-2003 IEEE Standard for Metal-Enclosed Bus
    IEEE DRAFT 1147 : D8 2005 GUIDE FOR THE REHABILITATION OF HYDROELECTRIC POWER PLANTS
    MIL-DTL-17361 Revision G:2006 CIRCUIT BREAKER TYPES AQB/NQB, AIR, ELECTRIC, LOW VOLTAGE, INSULATED HOUSING (SHIPBOARD USE), GENERAL SPECIFICATION FOR
    MIL-DTL-32485 Base Document:2013 CIRCUIT BREAKERS, VACUUM TYPE (VCB), ELECTRIC POWER, MEDIUM VOLTAGE, ALTERNATING CURRENT, DRAW-OUT REMOVABLE CONSTRUCTION, WITHOUT INTERNAL OVERCURRENT PROTECTION
    MIL-DTL-917 Revision F:2014 ELECTRIC POWER EQUIPMENT, BASIC REQUIREMENTS FOR
    IEEE C37.34-1994 IEEE Standard Test Code for High-Voltage Air Switches
    IEEE DRAFT C37.06 : D6 2004 AC HIGH-VOLTAGE CIRCUIT BREAKERS RATED ON A SYMMETRICAL CURRENT BASIS - PREFERRED RATINGS AND RELATED REQUIRED CAPABILITIES
    IEEE 1547.1-2005 IEEE Standard Conformance Test Procedures for Equipment Interconnecting Distributed Resources with Electric Power Systems
    CSA C62155:2006 HOLLOW PRESSURIZED AND UNPRESSURIZED CERAMIC AND GLASS INSULATORS FOR USE IN ELECTRICAL EQUIPMENT WITH RATED VOLTAGES GREATER THAN 1000 V
    CSA C22.2 No. 5 : 2013 MOLDED-CASE CIRCUIT BREAKERS, MOLDED-CASE SWITCHES AND CIRCUIT-BREAKER ENCLOSURES
    IEEE C37.010-1999 IEEE Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
    IEEE C37.100.1-2007 IEEE Standard of Common Requirements for High Voltage Power Switchgear Rated Above 1000 V
    IEEE C37.302-2015 IEEE Guide for Fault Current Limiter (FCL) Testing of FCLs Rated above 1000 V AC
    IEEE C37.63-2013 REDLINE IEEE Standard Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV
    IEEE C37.81-1989 IEEE Guide for Seismic Qualification of Class 1E Metal-Enclosed Power Switchgear Assemblies
    CSA C22.2 No. 5 PT1 : 1991 MOULDED CASE CIRCUIT BREAKERS
    CSA C22.2 NO No. 298 : 2016 HIGH VOLTAGE COUPLERS
    IEEE DRAFT C37.123 : D2 FEB 96 DRAFT GUIDE TO SPECIFICATIONS FOR GAS-INSULATED ELECTRIC POWER SUBSTATION EQUIPMENT
    IEEE DRAFT C57.12.44 : D2.1 2005 REQUIREMENTS FOR SECONDARY NETWORK PROTECTORS
    CSA C22.2 No. 253 : 2016 MEDIUM-VOLTAGE AC CONTACTORS, CONTROLLERS, AND CONTROL CENTRES
    ANSI C37.51 : 1989 SWITCHGEAR - METAL-ENCLOSED LOW-VOLTAGE AC POWER - CIRCUIT BREAKER SWITCHGEAR ASSEMBLIES - CONFORMANCE TEST PROCEDURES
    ANSI C37.57 : 1990 SWITCHGEAR - METAL-ENCLOSED INTERRUPTER SWITCHGEAR ASSEMBLIES - CONFORMANCE TESTING
    NEMA ICS 18:2001 (R2007) INDUSTRIAL CONTROL AND SYSTEMS: MOTOR CONTROL CENTERS
    NEMA ICS 3:2005 (R2010) INDUSTRIAL CONTROL AND SYSTEMS: MEDIUM VOLTAGE CONTROLLERS RATED 2001 TO 7200 VOLTS AC
    ANSI C37.58 : 1990 INDOOR AC MEDIUM-VOLTAGE SWITCHES FOR USE IN METAL-ENCLOSED SWITCHGEAR - CONFORMANCE TEST PROCEDURES
    ANSI C37.50 : 1989 SWITCHGEAR - LOW VOLTAGE AC POWER CIRCUIT BREAKERS USED IN ENCLOSURES - TEST PROCEDURES
    ANSI C37.55 : 1989 MEDIUM VOLTAGE METAL-CLAD ASSEMBLIES - CONFORMANCE TEST PROCEDURES
    ANSI C37.54 : 1996 FOR INDOOR ALTERNATING CURRENT HIGH-VOLTAGE CIRCUIT BREAKERS APPLIED AS REMOVABLE ELEMENTS IN METAL-ENCLOSED SWITCHGEAR ASSEMBLIES - CONFORMANCE TEST PROCEDURES
    NEMA SG 4:2009(R2013) ALTERNATING CURRENT HIGH-VOLTAGE CIRCUIT BREAKERS
    IEEE 387-1995 IEEE Standard Criteria for Diesel-Generator Units Applied as Standby Power Supplies for Nuclear Power Generating Stations
    IEEE DRAFT 404 : D13 2006 EXTRUDED AND LAMINATED DIELECTRIC SHIELDED CABLE JOINTS RATED 2500 V - 500 000 V
    IEEE C37.04-1999 IEEE Standard Rating Structure for AC High-Voltage Circuit Breakers
    IEEE C37.06-2009 IEEE Standard for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis--Preferred Ratings and Related Required Capabilities for Voltages Above 1000 V
    IEEE DRAFT C37.083 : 1998 DRAFT GUIDE FOR SYNTHETIC CAPACITIVE CURRENT SWITCHING TESTS OF AC HIGH-VOLTAGE CIRCUIT BREAKERS
    CSA C22.2 No. 274 : 2017 ADJUSTABLE SPEED DRIVES
    IEEE C37.06.1-2017 IEEE Recommended Practice for Preferred Ratings for High-Voltage(>1000 volts) AC Circuit Breakers Designated Definite Purpose for Fast Transient Recovery Voltage Rise Times
    IEEE DRAFT C37.20.4 : 2001 DRAFT STANDARD FOR INDOOR AC SWITCHES RATED ABOVE 1KV THROUGH 38KV FOR USE IN METAL-ENCLOSED SWITCHGEAR
    BS EN 62271-100 : 2009 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 100: ALTERNATING-CURRENT CIRCUIT-BREAKERS (IEC 62271-100:2008)
    IEEE C37.20.6-2015 IEEE Standard for 4.76 kV to 38 kV Rated Ground and Test Devices Used in Enclosures
    IEEE C37.59-2007 IEEE Standard Requirements for Conversion of Power Switchgear Equipment
    UNE-EN 62271-100:2011 High-voltage switchgear and controlgear -- Part 100: Alternating-current circuit-breakers
    UL 1682:5ED 2017-02 Plugs, Receptacles, and Cable Connectors of the Pin and Sleeve Type
    UL 1008:8ED 2014-12 Transfer Switch Equipment
    IEEE DRAFT C37.63 : D5 95 STANDARD REQUIREMENTS FOR OVERHEAD, PAD-MOUNTED, DRY-VAULT, AND SUBMERSIBLE AUTOMATIC LINE SECTIONALIZERS FOR AC SYSTEMS
    IEC TR 62271-306:2012 High-voltage switchgear and controlgear - Part 306: Guide to IEC 62271-100, IEC 62271-1 and other IEC standards related to alternating current circuit-breakers
    IEEE DRAFT C37.71 : D03 2000 DRAFT STANDARD FOR THREE-PHASE, MANUALLY OPERATED SUBSURFACE AND VAULT LOAD-INTERRUPTING SWITCHES FOR ALTERNATING-CURRENT SYSTEMS
    IEEE DRAFT C37.12.1 : D2.0 2006 HIGH HIGH-VOLTAGE (>1000 V) CIRCUIT BREAKER INSTRUCTION MANUAL CONTENT
    CSA C22.2 No. 254 : 2005(R2015) MOTOR CONTROL CENTRES
    IEEE C37.74-2014 REDLINE IEEE Standard Requirements for Subsurface, Vault, and Padmounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems up to 38 kV
    IEEE 2030.3-2016 IEEE Standard Test Procedures for Electric Energy Storage Equipment and Systems for Electric Power Systems Applications
    IEEE C37.10-2011 REDLINE IEEE Guide for Investigation, Analysis, and Reporting of Power Circuit Breaker Failures
    IEEE C37.011-2011 REDLINE IEEE Guide for the Application of Transient Recovery Voltage for AC High-Voltage Circuit Breakers
    EN 62271-100 : 2009 AMD 2/COR 18 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 100: ALTERNATING-CURRENT CIRCUIT-BREAKERS (IEC 62271-100:2008/A2:2017/COR1:2018)
    IEEE 1246-2011 REDLINE IEEE Guide for Temporary Protective Grounding Systems Used in Substations
    IEEE C37.12-2008 REDLINE IEEE Guide for Specifications of High-Voltage Circuit Breakers (over 1000 Volts)
    C22.2 NO. 182.1-17 Plugs, receptacles, and cable connectors of the pin and sleeve type (Trinational standard with NMX-J-719-ANCE and UL 1682)
    CSA C22.2 No. 178.1 : 2014 TRANSFER SWITCH EQUIPMENT
    IEEE C37.123-1996 IEEE Guide to Specifications for Gas-Insulated, Electric Power Substation Equipment
    IEEE C37.12-2008 SPECIFICATION GUIDE FOR AC HIGH-VOLTAGE CIRCUIT BREAKERS BASED ON A SYMMETRICAL CURRENT BASIS
    IEEE DRAFT 693 : D9 2004 SEISMIC DESIGN OF SUBSTATIONS
    IEEE 242-2001 IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems (IEEE Buff Book)
    IEEE 1147-2005 IEEE Guide for the Rehabilitation of Hydroelectric Power Plants
    UL 1008A:2ED 2017-09 Transfer Switch Equipment, Over 1000 Volts
    CSA C22.2 NO. 178.3:17 Transfer switch equipment, over 1000 volts (Binational standard with UL 1008A)
    IEEE C37.82-1987 IEEE Standard for the Qualification of Switchgear Assemblies for Class 1E Applications in Nuclear Power Generating Stations
    IEEE 241 : 1990 ELECTRIC POWER SYSTEMS IN COMMERCIAL BUILDINGS
    IEEE DRAFT C37.10 : D10 JUN 95 DIAGNOSTIC AND FAILURE INVESTIGATION OF POWER CIRCUIT BREAKERS
    IEEE C37.100.5-2018 IEEE Standard for Definitions of High-Voltage Circuit Breakers Above 1000 Vac and 3200 Vdc, and Reclosers and Other Distribution Equipment from 1000 Vac to 38 000 Vac
    MIL C 17361 : F CIRCUIT BREAKERS, AIR, ELECTRIC, INSULATED HOUSING (SHIPBOARD USE)
    C22.2 NO. 14-18 Industrial control equipment
    MIL-DTL-17587 Revision C:2007 CIRCUIT BREAKERS, ACB, LOW VOLTAGE, ELECTRIC POWER, AIR, REMOVABLE CONSTRUCTION, GENERAL SPECIFICATION FOR
    CSA C62155 : 2006 : R2011 HOLLOW PRESSURIZED AND UNPRESSURIZED CERAMIC AND GLASS INSULATORS FOR USE IN ELECTRICAL EQUIPMENT WITH RATED VOLTAGES GREATER THAN 1000 V
    IEEE C37.06-2009 AC HIGH-VOLTAGE CIRCUIT BREAKERS RATED ON A SYMMETRICAL CURRENT BASIS - PREFERRED RATINGS AND RELATED REQUIRED CAPABILITIES
    CSA C22.2 No. 282 : 2013 PLUGS, RECEPTACLES, AND COUPLERS FOR ELECTRIC VEHICLES
    IEEE 1247 : 2005 INTERRUPTER SWITCHES FOR ALTERNATING CURRENT, RATED ABOVE 1000 V
    IEEE C37.71-2001 IEEE Standard for Three-Phase Manually Operated Subsurface and Vault Load-Interrupting Switches for Alternating-Current Systems
    IEEE 317-2013 REDLINE IEEE Standard for Electric Penetration Assemblies in Containment Structures for Nuclear Power Generating Stations
    IEEE 551 : 2006 CALCULATING SHORT-CIRCUIT CURRENTS IN INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
    IEEE 404-2012 IEEE Standard for Extruded and Laminated Dielectric Shielded Cable Joints Rated 2.5 kV to 500 kV
    I.S. EN 62271-100:2009 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 100: ALTERNATING-CURRENT CIRCUIT-BREAKERS
    IEEE C37.20.1-2015 REDLINE IEEE Standard for Metal-Enclosed Low-Voltage (1000 Vac and below, 3200 Vdc and below) Power Circuit Breaker Switchgear
    IEEE C37.20.3-2013 REDLINE IEEE Standard for Metal-Enclosed Interrupter Switchgear (1 kV-38 kV)
    IEC 62271-100:2008+AMD1:2012+AMD2:2017 CSV High-voltage switchgear and controlgear - Part 100: Alternating-current circuit-breakers
    IEEE C37.122.2-2011 IEEE Guide for the Application of Gas-Insulated Substations 1 kV to 52 kV
    IEEE C37.30.1-2011 IEEE Standard Requirements for AC High-Voltage Air Switches Rated Above 1000 V
    IEEE C37.010-2016 IEEE Application Guide for AC High-Voltage Circuit Breakers > 1000 Vac Rated on a Symmetrical Current Basis
    IEEE C62.11-2005 IEEE Standard for Metal-Oxide Surge Arresters for AC Power Circuits (> 1 kV)
    IEEE C37.23-2015 IEEE Standard for Metal-Enclosed Bus
    IEEE C37.011-2005 IEEE Application Guide for Transient Recovery Voltage for AC High-Voltage Circuit Breakers
    IEEE C37.81-2017 IEEE Guide for Seismic Qualification of Class 1E Metal-Enclosed Power Switchgear Assemblies
    IEEE C57.13-2008 IEEE Standard Requirements for Instrument Transformers
    IEEE C37.74-2003 IEEE Standard Requirements for Subsurface, Vault, and Padmounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems up to 38 kV
    IEEE C37.30.3-2018 IEEE Standard Requirements for High-Voltage Interrupter Switches, Interrupters, or Interrupting Aids Used on or Attached to Switches Rated for Alternating Currents Above 1000 V
    IEEE 404-2006 IEEE Standard for Extruded and Laminated Dielectric Shielded Cable Joints Rated 2 500v to 500 000v
    IEEE C37.123-2016 IEEE Guide for Specifications for High-Voltage Gas-Insulated Substations Rated 52 kV and Above
    IEEE C57.13-2016 IEEE Standard Requirements for Instrument Transformers
    IEEE C37.20.6-2007 IEEE Standard for 4.76 kV to 38 kV Rated Ground and Test Devices Used in Enclosures
    IEEE C37.012-2005 IEEE Application Guide for Capacitance Current Switching for AC High-Voltage Circuit Breakers
    IEEE 824-2004 IEEE Standard for Series Capacitor Banks in Power Systems
    IEEE C37.63-2005 IEEE Standard Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for AC Systems

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

    IEC 62271-100:2008+AMD1:2012+AMD2:2017 CSV High-voltage switchgear and controlgear - Part 100: Alternating-current circuit-breakers
    IEEE C37.013-1997 IEEE Standard for AC High-Voltage Generator Circuit Breakers Rated on a Symmetrical Current Basis
    IEEE/ANSI C37.06-2000 American National Standard for AC High-Voltage Circuit Breakers - Rated on a Symmetrical Current Basis - Preferred Ratings and Related Required Capabilities
    IEEE C37.20.2-2015 IEEE Standard for Metal-Clad Switchgear
    IEEE C57.19.01-2000 IEEE Standard Performance Characteristics and Dimensions for Outdoor Apparatus Bushings
    IEEE C57.19.00 : 2004 GENERAL REQUIREMENTS AND TEST PROCEDURE FOR POWER APPARATUS BUSHINGS
    IEEE C37.04B : 2008 RATING STRUCTURE FOR AC HIGH-VOLTAGE CIRCUIT BREAKERS RATED ON A SYMMETRICAL CURRENT BASIS - AMENDMENT 2: TO CHANGE THE DESCRIPTION OF TRANSIENT RECOVERY VOLTAGE FOR HARMONIZATION WITH IEC 62271-100
    IEEE 4-2013 IEEE Standard for High-Voltage Testing Techniques
    IEEE C37.011-1994 IEEE Application Guide for Transient Recovery Voltage for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
    IEEE C37.010-1999 IEEE Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis
    ANSI C84.1 : 2016 ELECTRIC POWER SYSTEMS AND EQUIPMENT - VOLTAGE RATINGS (60 HERTZ)
    IEEE C37.11-2014 IEEE Standard Requirements for Electrical Control for AC High-Voltage (>1000 V) Circuit Breakers
    ANSI C37.54 : 1996 FOR INDOOR ALTERNATING CURRENT HIGH-VOLTAGE CIRCUIT BREAKERS APPLIED AS REMOVABLE ELEMENTS IN METAL-ENCLOSED SWITCHGEAR ASSEMBLIES - CONFORMANCE TEST PROCEDURES
    IEC 60068-2-17:1994 Basic environmental testing procedures - Part 2-17: Tests - Test Q: Sealing
    IEEE C37.011-2011 REDLINE IEEE Guide for the Application of Transient Recovery Voltage for AC High-Voltage Circuit Breakers
    IEEE C37.06-2009 AC HIGH-VOLTAGE CIRCUIT BREAKERS RATED ON A SYMMETRICAL CURRENT BASIS - PREFERRED RATINGS AND RELATED REQUIRED CAPABILITIES
    IEEE 119-1974 IEEE Recommended Practice for General Principles of Temperature Measurement as Applied to Electrical Apparatus
    IEC 62271-1:2017 High-voltage switchgear and controlgear - Part 1: Common specifications for alternating current switchgear and controlgear
    IEEE C37.015-2009 IEEE Guide for the Application of Shunt Reactor Switching
    IEEE C37.24-2003 IEEE Guide for Evaluating the Effect of Solar Radiation on Outdoor Metal-Enclosed Switchgear
    IEEE/ANSI C37.06.1-2000 American National Standard Guide for High-Voltage Circuit Breakers Rated on Symmetrical Current Basis Designated - Definite Purpose for Fast Transient Recovery Voltage Rise Times
    IEEE C37.04-1999 IEEE Standard Rating Structure for AC High-Voltage Circuit Breakers
    IEEE C37.06-2009 IEEE Standard for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis--Preferred Ratings and Related Required Capabilities for Voltages Above 1000 V
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