GB 7674-1997 72.5kV及以上气体绝缘金属封闭开关设备
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基本信息
标准名称: | 72.5kV及以上气体绝缘金属封闭开关设备 |
英文名称: | Gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above |
中标分类: |
电工 >>
输变电设备 >>
高压开关设备 |
ICS分类: |
|
替代情况: | 替代GB 7674-1987;被GB 7674-2008代替 |
发布部门: | 国家技术监督局 |
发布日期: | 1997-07-02 |
实施日期: | 1998-08-01 |
首发日期: | 1987-04-16 |
作废日期: | 2009-06-01 |
主管部门: | 中国电器工业协会 |
归口单位: | 全国高压开关设备标准化技术委员会 |
起草单位: | 西安高压电器研究所 |
出版社: | 中国标准出版社 |
出版日期: | 2004-04-05 |
页数: | 平装16开, 页数:37, 字数:66千字 |
书号: | 155066.1-14698 |
适用范围
本标准规定了额定电压交流72.5kV及以上、频率50Hz的户内、户外型气体绝缘金属封闭开关设备的使用条件、额定值、设计与结构以及试验等方而的要求。本标准适用于全部或部分地采用气体作为绝缘介质的气体绝缘金属封闭开关设备。
前言
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引用标准
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所属分类: 电工 输变电设备 高压开关设备
Product Code:SAE AMS5352
Title:Steel, Corrosion-Resistant, Investment Castings, 17Cr - 0.55Mo (0.95 - 1.20C), Annealed
Issuing Committee:Ams F Corrosion Heat Resistant Alloys Committee
Scope:This specification covers a corrosion-resistant steel in the form of investment castings.These castings have been used typically for parts requiring hardness up to 58 HRC and having resistance to corrosion and to wear, but usage is not limited to such applications. Optimum corrosion resistance is obtained by hardening from 1850 to 1950 掳F (1010 to 1066 掳C) and tempering at not higher than 800 掳F (427 掳C).【英文标准名称】:Samplingproceduresforinspectionbyvariables-Part1:Specificationforsinglesamplingplansindexedbyacceptancequalitylimit(AQL)forlot-by-lotinspectionforasinglequalitycharacteristicandasingleAQL
【原文标准名称】:计量检验的抽样程序.第1部分:按接收质量限(AQL)检索的单一质量特性和单一AQL的逐批检验一次抽样计划的规范
【标准号】:ISO3951-1-2005
【标准状态】:现行
【国别】:国际
【发布日期】:2005-04
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC69
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;检验;定义;参数;抽样方法;接收质量限;AQL值;错误;抽样特性曲线;特性;缺陷与故障;统计学;计量检查;验收抽样;表(数据);统计质量控制;抽样表;随机试样;样品试验;图示;质量保证;批量检验
【英文主题词】:Acceptablequalitylimits;Acceptancesampling;AQL-value;Batchtesting;Characteristics;Defects;Definitions;Diagrams;Errors;Inspection;Inspectionbyvariables;Inspectionlots;Limits(mathematics);Multilingual;Operatingcharacteristiccurve;Parameters;Performancecharacteristics;Qualityassurance;Randomsamples;Sampletests;Samplingmethods;Samplingtables;Statisticalqualitycontrol;Statistics;Tables(data);Testing
【摘要】:ThispartofISO3951specifiesanacceptancesamplingsystemofsinglesamplingplansforinspectionbyvariables,inwhichtheacceptabilityofalotisimplicitlydeterminedfromanestimateofthepercentageofnonconformingitemsintheprocess,basedonarandomsampleofitemsfromthelot.ThispartofISO3951isprimarilydesignedforapplicationunderthefollowingconditions:a)wheretheinspectionprocedureistobeappliedtoacontinuingseriesoflotsofdiscreteproductsallsuppliedbyoneproducerusingoneproductionprocess;b)whereonlyasinglequalitycharacteristicxoftheseproductsistakenintoconsideration,whichmustbemeasurableonacontinuousscale;c)wherethemeasurementerrorisnegligible,i.e.withastandarddeviationnomorethan10%oftheprocessstandarddeviation;d)whereproductionisstable(understatisticalcontrol)andthequalitycharacteristicxisdistributedaccordingtoanormaldistributionoracloseapproximationtothenormaldistribution;e)whereacontractorstandarddefinesanupperspecificationlimitU,alowerspecificationlimitL,orboth;anitemisqualifiedasconformingifandonlyifitsmeasuredqualitycharacteristicxsatisfiestheappropriateoneofthefollowinginequalities:1)xWL(i.e.thelowerspecificationlimitisnotviolated);2)xuU(i.e.theupperspecificationlimitisnotviolated);3)xWLandxuU(i.e.neitherthelowernortheupperspecificationlimitisviolated).Inequalities1)and2)arecalledcaseswithasinglespecificationlimit,and3)acasewithdoublespecificationlimits.Ifdoublespecificationlimitsapply,itisassumedinthispartofISO3951thatconformancetobothspecificationlimitsisequallyimportanttotheintegrityoftheproduct;insuchcasesitisappropriatetoapplyasingleAQLtothecombinedpercentageofproductoutsidethetwospecificationlimits.Thisisreferredtoascombinedcontrol.
【中国标准分类号】:A00
【国际标准分类号】:03_120_30
【页数】:103P;A4
【正文语种】:英语