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          This corrigendum is to improve the current IEEE Std C37.09(TM).<br />\n
          \t\t\t\t<br />\n
          a. Clause 4.10.4 the ratio of zero and positive sequence currents in single phase capacitive switching procedure should be less than 3.0 rather than greater than 3.0.<br />\n
          b. Errors in clause 4.10.9.1.8 and 4.10.9.2.7 regarding reference to the procedure for separate making tests.<br />\n
          c. 4.10.9.1.3 change in punctuation for clarity<br />\n
          d. Throughout document unify terms for rated voltage, including in equations to use &quot;Ur&quot; rather than &quot;V&quot;<br />\n
          f. Clause 4.1.2 i) is missing some words required for clear meaning.<br />\n
          g. Correct references and terms used by both C37.04 and C37.09 so they are identical<br />\n
          h. Remove classification of tests in the Scope as only design tests are covered.<br />\n
          i. Clauses 4.5.7 and 4.5.8.1 to make clear that average of the test impulses shall be equal or higher than rated value<br />\n
          j. clarify in 4.8.2.7. which tests to be performed at minimum control voltage<br />\n
          k. Correct item list in 4.8.2.3.3<br />\n
          l. Correct title of Figure 3 and correct Figure 4 (example for incorrect grounding condition given)<br />\n
          m. Correct arcing window/multiplier in Table 5<br />\n
          n. Correct item list in 4.8.5.4.3<br />\n
          o. correct the steps of electrical degrees for capacitance switching duties in 4.10.9.2.7 (30° for single- and 10° for three phase)<br />\n
          p. further minor items depending upon agreement in the WG
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          This test procedure summarizes the various tests which are made on ac high-voltage circuit breakers, describes accepted methods used in making the tests, and specifies the tests which will demonstrate ratings under ANSI/IEEE standards. It does not preclude the use of other equivalent or more effective methods of demonstrating ratings.<br />\n
          The tests are divided into the following classifications<br />\n
          --Design tests<br />\n
          --Production tests<br />\n
          --Tests after delivery<br />\n
          --Field tests<br />\n
          --Conformance tests<br />\n
          The purposes of the test procedure are:1) To establish that a circuit breaker of the design on test can perform satisfactorily, both electrically and mechanically, up to the ratings assigned to it; 2) To establish that production breakers have been adequately tested during manufacture and after assembly and that the breakers have characteristics essentially the same as the breaker of identical design which was subjected to design tests
          """
        #metaKeywords: null
        #metaDescription: null
        #shortDescription: "IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis"
        -notes: "Superseded"
      }
    ]
    #currentLocale: "en_US"
    #currentTranslation: null
    #fallbackLocale: "en_US"
    #variantSelectionMethod: "match"
    #productTaxons: Doctrine\ORM\PersistentCollection {#113710 …}
    #channels: Doctrine\ORM\PersistentCollection {#113716 …}
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    #reviews: Doctrine\ORM\PersistentCollection {#113712 …}
    #averageRating: 0.0
    #images: Doctrine\ORM\PersistentCollection {#113714 …}
    -supplier: Proxies\__CG__\App\Entity\Supplier\Supplier {#7324 …}
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    -apiLastModifiedAt: DateTime @1754517600 {#113697
      date: 2025-08-07 00:00:00.0 Europe/Paris (+02:00)
    }
    -lastUpdatedAt: DateTime @1578006000 {#113698
      date: 2020-01-03 00:00:00.0 Europe/Paris (+01:00)
    }
    -author: ""
    -publishedAt: DateTime @344214000 {#113699
      date: 1980-11-28 00:00:00.0 Europe/Paris (+01:00)
    }
    -releasedAt: null
    -confirmedAt: DateTime @593305200 {#113700
      date: 1988-10-20 00:00:00.0 Europe/Paris (+01:00)
    }
    -canceledAt: null
    -edition: null
    -coreDocument: "C37.09"
    -bookCollection: ""
    -pageCount: 60
    -documents: Doctrine\ORM\PersistentCollection {#113704 …}
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Attributes 
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Component 
App\Twig\Components\ProductMostRecent {#115492
  +product: App\Entity\Product\Product {#113701
    #id: 9477
    #code: "IEEE00002439"
    #attributes: Doctrine\ORM\PersistentCollection {#113718 …}
    #variants: Doctrine\ORM\PersistentCollection {#113720 …}
    #options: Doctrine\ORM\PersistentCollection {#113724 …}
    #associations: Doctrine\ORM\PersistentCollection {#113722 …}
    #createdAt: DateTime @1751038295 {#113695
      date: 2025-06-27 17:31:35.0 Europe/Paris (+02:00)
    }
    #updatedAt: DateTime @1754607611 {#113696
      date: 2025-08-08 01:00:11.0 Europe/Paris (+02:00)
    }
    #enabled: true
    #translations: Doctrine\ORM\PersistentCollection {#113708 …}
    #translationsCache: [
      "en_US" => App\Entity\Product\ProductTranslation {#115425
        #locale: "en_US"
        #translatable: App\Entity\Product\Product {#113701}
        #id: 32917
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        #description: """
          New IEEE Standard - Superseded.<br />\n
          The various tests that are made on AC high-voltage circuit breakers are summarized. Accepted methods used in making the tests are described, and the tests that will demonstrate ratings under ANSI/IEEE standards are specified. The following categories of tests are considered: design tests, production tests, tests after delivery, field tests, and conformance tests.<br />\n
          \t\t\t\t<br />\n
          This test procedure summarizes the various tests which are made on ac high-voltage circuit breakers, describes accepted methods used in making the tests, and specifies the tests which will demonstrate ratings under ANSI/IEEE standards. It does not preclude the use of other equivalent or more effective methods of demonstrating ratings.<br />\n
          The tests are divided into the following classifications<br />\n
          --Design tests<br />\n
          --Production tests<br />\n
          --Tests after delivery<br />\n
          --Field tests<br />\n
          --Conformance tests<br />\n
          The purposes of the test procedure are:1) To establish that a circuit breaker of the design on test can perform satisfactorily, both electrically and mechanically, up to the ratings assigned to it; 2) To establish that production breakers have been adequately tested during manufacture and after assembly and that the breakers have characteristics essentially the same as the breaker of identical design which was subjected to design tests
          """
        #metaKeywords: null
        #metaDescription: null
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    #reviews: Doctrine\ORM\PersistentCollection {#113712 …}
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    #images: Doctrine\ORM\PersistentCollection {#113714 …}
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    -lastUpdatedAt: DateTime @1578006000 {#113698
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      date: 1988-10-20 00:00:00.0 Europe/Paris (+01:00)
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    -coreDocument: "C37.09"
    -bookCollection: ""
    -pageCount: 60
    -documents: Doctrine\ORM\PersistentCollection {#113704 …}
    -favorites: Doctrine\ORM\PersistentCollection {#113706 …}
  }
  +label: "Historical"
  +icon: "historical"
  -mostRecentAttributeCode: "most_recent"
  -localeContext: Sylius\Component\Locale\Context\CompositeLocaleContext {#1833 …}
}
ProductCard App\Twig\Components\ProductCard 180.0 MiB 8.44 ms
Input props 
[
  "product" => App\Entity\Product\Product {#137155
    #id: 9472
    #code: "IEEE00002427"
    #attributes: Doctrine\ORM\PersistentCollection {#137138 …}
    #variants: Doctrine\ORM\PersistentCollection {#137136 …}
    #options: Doctrine\ORM\PersistentCollection {#137131 …}
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    #enabled: true
    #translations: Doctrine\ORM\PersistentCollection {#137149 …}
    #translationsCache: [
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        #locale: "en_US"
        #translatable: App\Entity\Product\Product {#137155}
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          Revision Standard - Superseded.<br />\n
          This standard covers the rating structure for all high-voltage circuit breakers, which include all voltage ratings above 1000 V ac and comprise both indoor and outdoor types having the preferred ratings as listed in ANSI C37.06-1997. Typical circuit breakers covered by these standards have maximum voltage ratings ranging from 4.76 kV through 800 kV, and continuous current ratings of 600 A,1200 A, 2000 A, and 3000 A associated with the various maximum voltage ratings. The rating structure establishes the basis for all assigned ratings, including continuous current, dielectric withstand voltages,short-circuit current, transient recovery voltage, and capacitor switching, plus associated capabilities such as mechanical endurance, load current, and out-of-phase switching. This standard does not cover generator circuit breakers, which are covered in IEEE Std C37.013-1997.<br />\n
          \t\t\t\t<br />\n
          This standard establishes a symmetrical current rating structure and construction requirements for all indoor and outdoor types of ac high-voltage circuit breakers rated above 1000 V. It is only applicable to three-pole circuit breakers used in three-phase systems and single-pole circuit breakers used in single-phase systems.<br />\n
          This standard does not cover circuit breakers used at frequencies other than 50 Hz or 60 Hz, or generator circuit breakers that are covered in IEEE Std C37.013-1997.
          """
        #metaKeywords: null
        #metaDescription: null
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    #images: Doctrine\ORM\PersistentCollection {#137142 …}
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    -documents: Doctrine\ORM\PersistentCollection {#137153 …}
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  "additionalClasses" => "product__teaser--with-grey-border"
  "hasStretchedLink" => true
  "hoverType" => "shadow"
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]
Attributes 
[]
Component 
App\Twig\Components\ProductCard {#137189
  +product: App\Entity\Product\Product {#137155
    #id: 9472
    #code: "IEEE00002427"
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    #enabled: true
    #translations: Doctrine\ORM\PersistentCollection {#137149 …}
    #translationsCache: [
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          Revision Standard - Superseded.<br />\n
          This standard covers the rating structure for all high-voltage circuit breakers, which include all voltage ratings above 1000 V ac and comprise both indoor and outdoor types having the preferred ratings as listed in ANSI C37.06-1997. Typical circuit breakers covered by these standards have maximum voltage ratings ranging from 4.76 kV through 800 kV, and continuous current ratings of 600 A,1200 A, 2000 A, and 3000 A associated with the various maximum voltage ratings. The rating structure establishes the basis for all assigned ratings, including continuous current, dielectric withstand voltages,short-circuit current, transient recovery voltage, and capacitor switching, plus associated capabilities such as mechanical endurance, load current, and out-of-phase switching. This standard does not cover generator circuit breakers, which are covered in IEEE Std C37.013-1997.<br />\n
          \t\t\t\t<br />\n
          This standard establishes a symmetrical current rating structure and construction requirements for all indoor and outdoor types of ac high-voltage circuit breakers rated above 1000 V. It is only applicable to three-pole circuit breakers used in three-phase systems and single-pole circuit breakers used in single-phase systems.<br />\n
          This standard does not cover circuit breakers used at frequencies other than 50 Hz or 60 Hz, or generator circuit breakers that are covered in IEEE Std C37.013-1997.
          """
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    #variantSelectionMethod: "match"
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    #averageRating: 0.0
    #images: Doctrine\ORM\PersistentCollection {#137142 …}
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    -documents: Doctrine\ORM\PersistentCollection {#137153 …}
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  +linkLabel: "See more"
  +imageFilter: "product_thumbnail_teaser"
  +hasStretchedLink: true
  +backgroundColor: "white"
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}
ProductState App\Twig\Components\ProductState 180.0 MiB 0.16 ms
Input props 
[
  "product" => App\Entity\Product\Product {#137155
    #id: 9472
    #code: "IEEE00002427"
    #attributes: Doctrine\ORM\PersistentCollection {#137138 …}
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    #enabled: true
    #translations: Doctrine\ORM\PersistentCollection {#137149 …}
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          Revision Standard - Superseded.<br />\n
          This standard covers the rating structure for all high-voltage circuit breakers, which include all voltage ratings above 1000 V ac and comprise both indoor and outdoor types having the preferred ratings as listed in ANSI C37.06-1997. Typical circuit breakers covered by these standards have maximum voltage ratings ranging from 4.76 kV through 800 kV, and continuous current ratings of 600 A,1200 A, 2000 A, and 3000 A associated with the various maximum voltage ratings. The rating structure establishes the basis for all assigned ratings, including continuous current, dielectric withstand voltages,short-circuit current, transient recovery voltage, and capacitor switching, plus associated capabilities such as mechanical endurance, load current, and out-of-phase switching. This standard does not cover generator circuit breakers, which are covered in IEEE Std C37.013-1997.<br />\n
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          This standard establishes a symmetrical current rating structure and construction requirements for all indoor and outdoor types of ac high-voltage circuit breakers rated above 1000 V. It is only applicable to three-pole circuit breakers used in three-phase systems and single-pole circuit breakers used in single-phase systems.<br />\n
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    -documents: Doctrine\ORM\PersistentCollection {#137153 …}
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Attributes 
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]
Component 
App\Twig\Components\ProductState {#137276
  +product: App\Entity\Product\Product {#137155
    #id: 9472
    #code: "IEEE00002427"
    #attributes: Doctrine\ORM\PersistentCollection {#137138 …}
    #variants: Doctrine\ORM\PersistentCollection {#137136 …}
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    #enabled: true
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      "en_US" => App\Entity\Product\ProductTranslation {#137272
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        #translatable: App\Entity\Product\Product {#137155}
        #id: 32897
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          Revision Standard - Superseded.<br />\n
          This standard covers the rating structure for all high-voltage circuit breakers, which include all voltage ratings above 1000 V ac and comprise both indoor and outdoor types having the preferred ratings as listed in ANSI C37.06-1997. Typical circuit breakers covered by these standards have maximum voltage ratings ranging from 4.76 kV through 800 kV, and continuous current ratings of 600 A,1200 A, 2000 A, and 3000 A associated with the various maximum voltage ratings. The rating structure establishes the basis for all assigned ratings, including continuous current, dielectric withstand voltages,short-circuit current, transient recovery voltage, and capacitor switching, plus associated capabilities such as mechanical endurance, load current, and out-of-phase switching. This standard does not cover generator circuit breakers, which are covered in IEEE Std C37.013-1997.<br />\n
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          This standard establishes a symmetrical current rating structure and construction requirements for all indoor and outdoor types of ac high-voltage circuit breakers rated above 1000 V. It is only applicable to three-pole circuit breakers used in three-phase systems and single-pole circuit breakers used in single-phase systems.<br />\n
          This standard does not cover circuit breakers used at frequencies other than 50 Hz or 60 Hz, or generator circuit breakers that are covered in IEEE Std C37.013-1997.
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    #productTaxons: Doctrine\ORM\PersistentCollection {#137147 …}
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    -bookCollection: ""
    -pageCount: 36
    -documents: Doctrine\ORM\PersistentCollection {#137153 …}
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  }
  +appearance: "state-suspended"
  +labels: [
    "Superseded"
  ]
  -stateAttributeCode: "state"
  -localeContext: Sylius\Component\Locale\Context\CompositeLocaleContext {#1833 …}
}
ProductMostRecent App\Twig\Components\ProductMostRecent 180.0 MiB 0.62 ms
Input props 
[
  "product" => App\Entity\Product\Product {#137155
    #id: 9472
    #code: "IEEE00002427"
    #attributes: Doctrine\ORM\PersistentCollection {#137138 …}
    #variants: Doctrine\ORM\PersistentCollection {#137136 …}
    #options: Doctrine\ORM\PersistentCollection {#137131 …}
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    #createdAt: DateTime @1751038291 {#137128
      date: 2025-06-27 17:31:31.0 Europe/Paris (+02:00)
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    #enabled: true
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      "en_US" => App\Entity\Product\ProductTranslation {#137272
        #locale: "en_US"
        #translatable: App\Entity\Product\Product {#137155}
        #id: 32897
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Component 
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Component 
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ProductState App\Twig\Components\ProductState 180.0 MiB 0.15 ms
Input props 
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Attributes 
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Component 
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ProductMostRecent App\Twig\Components\ProductMostRecent 180.0 MiB 0.54 ms
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App\Twig\Components\ProductMostRecent {#137529
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        #name: "IEEE C37.09a:2005 (R2007)"
        #slug: "ieee-c37-09a-2005-r2007-ieee00003233-241563"
        #description: """
          Amendment Standard - Superseded.<br />\n
          A revision to the capacitance current switching standards is included in this amendment.<br />\n
          \t\t\t\t<br />\n
          The scope of PC37.09a is to incorporate IEC 62271-100 capacitance current switching treatment into the circuit breaker test code. This applies to Circuit Breakers above 1000V ac.<br />\n
          Capacitance current switching was not addressed in C37.09-1999 to take advantage of a joint IEC/IEEE working group on this subject. This Amendment will bring about harmonization with the new IEC 62271-100.
          """
        #metaKeywords: null
        #metaDescription: null
        #shortDescription: "IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis- Amendment 1: Capacitance Current Switching"
        -notes: "Superseded"
      }
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    -author: ""
    -publishedAt: DateTime @1126821600 {#7318
      date: 2005-09-16 00:00:00.0 Europe/Paris (+02:00)
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