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| Component | App\Twig\Components\ProductMostRecent {#93276 +product: App\Entity\Product\Product {#7311 #id: 9672 #code: "IEEE00002736" #attributes: Doctrine\ORM\PersistentCollection {#7701 …} #variants: Doctrine\ORM\PersistentCollection {#7744 …} #options: Doctrine\ORM\PersistentCollection {#7916 …} #associations: Doctrine\ORM\PersistentCollection {#7900 …} #createdAt: DateTime @1751038458 {#7274 : 2025-06-27 17:34:18.0 Europe/Paris (+02:00) } #updatedAt: DateTime @1754607004 {#7322 : 2025-08-08 00:50:04.0 Europe/Paris (+02:00) } #enabled: true #translations: Doctrine\ORM\PersistentCollection {#7922 …} #translationsCache: [ "en_US" => App\Entity\Product\ProductTranslation {#7921 #locale: "en_US" #translatable: App\Entity\Product\Product {#7311} #id: 33697 #name: "IEEE C57.13.1:1981 (R1999)" #slug: "ieee-c57-13-1-1981-r1999-ieee00002736-241324" #description: """ New IEEE Standard - Superseded.<br />\n A description is given of field-test methods that will ensure that the current transformers used as a source of relay input current are connected properly, are of marked ratio and polarity, and are in condition to perform as designed both initially and after a period of service. The standard covers safety considerations; current transformer types and construction and the effect of these on test methods; insulation resistance tests; ratio tests; polarity check; winding and lead resistance (internal resistance); excitation tests; burden measurements; and specialized situations.<br />\n \t\t\t\t<br />\n In the application of protective relays, the most widely used input quantity is current. A multiplicity of different protective relays either utilizes current directly, combines it with other currents as in differential schemes, or combines it with voltage to make impedance or power measurements. The source of relay input current is from current transformers which may be located on the bushings of power circuit breakers and power transformers, on the bus bars of metal clad switchgear, or installed as separate items of equipment located as required.<br />\n The purpose of this guide is to describe field test methods that will assure that the current transformers are connected properly, are of marked ratio and polarity, and are in condition to perform as designed both initially and after a period of service """ #metaKeywords: null #metaDescription: null #shortDescription: "IEEE Guide for Field Testing of Relaying Current Transformers" -notes: "Superseded" } ] #currentLocale: "en_US" #currentTranslation: null #fallbackLocale: "en_US" #variantSelectionMethod: "match" #productTaxons: Doctrine\ORM\PersistentCollection {#7534 …} #channels: Doctrine\ORM\PersistentCollection {#7628 …} #mainTaxon: Proxies\__CG__\App\Entity\Taxonomy\Taxon {#7309 …} #reviews: Doctrine\ORM\PersistentCollection {#7613 …} #averageRating: 0.0 #images: Doctrine\ORM\PersistentCollection {#7645 …} -supplier: Proxies\__CG__\App\Entity\Supplier\Supplier {#7324 …} -subscriptionCollections: Doctrine\ORM\PersistentCollection {#7321 …} -apiLastModifiedAt: DateTime @1754517600 {#7317 : 2025-08-07 00:00:00.0 Europe/Paris (+02:00) } -lastUpdatedAt: DateTime @1578006000 {#7292 : 2020-01-03 00:00:00.0 Europe/Paris (+01:00) } -author: "" -publishedAt: DateTime @344386800 {#7318 : 1980-11-30 00:00:00.0 Europe/Paris (+01:00) } -releasedAt: null -confirmedAt: DateTime @930348000 {#7316 : 1999-06-26 00:00:00.0 Europe/Paris (+02:00) } -canceledAt: null -edition: null -coreDocument: "C57.13.1" -bookCollection: "" -pageCount: 17 -documents: Doctrine\ORM\PersistentCollection {#7465 …} -favorites: Doctrine\ORM\PersistentCollection {#7500 …} } +label: "Historical" +icon: "historical" -mostRecentAttributeCode: "most_recent" -localeContext: Sylius\Component\Locale\Context\CompositeLocaleContext {#1833 …} } |
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| Input props | [ "product" => App\Entity\Product\Product {#93685 #id: 11276 #code: "IEEE00005838" #attributes: Doctrine\ORM\PersistentCollection {#93665 …} #variants: Doctrine\ORM\PersistentCollection {#93662 …} #options: Doctrine\ORM\PersistentCollection {#93658 …} #associations: Doctrine\ORM\PersistentCollection {#93654 …} #createdAt: DateTime @1751039602 {#93692 : 2025-06-27 17:53:22.0 Europe/Paris (+02:00) } #updatedAt: DateTime @1754607611 {#93671 : 2025-08-08 01:00:11.0 Europe/Paris (+02:00) } #enabled: true #translations: Doctrine\ORM\PersistentCollection {#93676 …} #translationsCache: [ "en_US" => App\Entity\Product\ProductTranslation {#93717 #locale: "en_US" #translatable: App\Entity\Product\Product {#93685} #id: 40113 #name: "IEEE C57.13.1:2017" #slug: "ieee-c57-13-1-2017-ieee00005838-242928" #description: """ Revision Standard - Active.<br />\n This guide describes field test methods that assure that current transformers are connected properly, are of marked ratio and polarity, and are in a condition to perform as designed both initially and after having been in service for a period of time.<br />\n \t\t\t\t<br />\n The scope of this guide is to describe field test methods that assure current transformers (CTs) are connected properly, are of marked ratio and polarity, and are in a condition to perform as designed both initially and after being in service for a period of time.<br />\n Annex A describes wiring integrity checks, the use of test jacks, current-shorting switches, and relay test equipment.<br />\n Annex B illustrates excitation voltage measurement differences between rms responding voltmeters(commonly used under field conditions) and average responding voltmeters (commonly used in laboratory tests) and also discusses the effect of the source impedance.<br />\n Annex C describes the characteristics, and other pertinent information, of optical current sensor systems used with protective relaying. It provides an overview of the components used in an optical sensor system, discusses the differences from conventional CTs, and provides testing information.<br />\n Annex D is the bibliography for this guide.<br />\n The purpose of the guide is to provide information on the current technology for field testing of instrument transformers and to more closely coordinate the information with the other industry standards, for example, the National Electrical Safety Code(R) (NESC(R)) (Accredited Standards Committee C2). """ #metaKeywords: null #metaDescription: null #shortDescription: "IEEE Guide for Field Testing of Relaying Current Transformers" -notes: "Active" } ] #currentLocale: "en_US" #currentTranslation: null #fallbackLocale: "en_US" #variantSelectionMethod: "match" #productTaxons: Doctrine\ORM\PersistentCollection {#93674 …} #channels: Doctrine\ORM\PersistentCollection {#93667 …} #mainTaxon: Proxies\__CG__\App\Entity\Taxonomy\Taxon {#7309 …} #reviews: Doctrine\ORM\PersistentCollection {#93672 …} #averageRating: 0.0 #images: Doctrine\ORM\PersistentCollection {#93669 …} -supplier: Proxies\__CG__\App\Entity\Supplier\Supplier {#7324 …} -subscriptionCollections: Doctrine\ORM\PersistentCollection {#93682 …} -apiLastModifiedAt: DateTime @1754517600 {#93655 : 2025-08-07 00:00:00.0 Europe/Paris (+02:00) } -lastUpdatedAt: DateTime @1578006000 {#93691 : 2020-01-03 00:00:00.0 Europe/Paris (+01:00) } -author: "" -publishedAt: DateTime @1540940400 {#93690 : 2018-10-31 00:00:00.0 Europe/Paris (+01:00) } -releasedAt: null -confirmedAt: null -canceledAt: DateTime @1540940400 {#93684 : 2018-10-31 00:00:00.0 Europe/Paris (+01:00) } -edition: null -coreDocument: "C57.13.1" -bookCollection: "" -pageCount: 46 -documents: Doctrine\ORM\PersistentCollection {#93680 …} -favorites: Doctrine\ORM\PersistentCollection {#93678 …} } "showFullLabel" => "true" ] |
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