HB 2684-1976 后刀架用带尾柄的切断刀刀座
作者:标准资料网 时间:2024-05-16 21:30:07 浏览:9364
来源:标准资料网
基本信息
| 标准名称： | 后刀架用带尾柄的切断刀刀座 |
| 中标分类： |
机械 >>
金属切削机床 >>
机床辅具与附件 |
| 发布日期： | 1978-05-24 |
| 实施日期： | 1978-12-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 3页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 机械 金属切削机床 机床辅具与附件
【英文标准名称】:Electromagneticcompatibility(EMC)-Part5-7:Installationandmitigationguidelines;Degreesofprotectionprovidedbyenclosuresagainstelectromagneticdisturbances(EMcode)
【原文标准名称】:电磁兼容性(EMC)第5-7部分：安装和调试指南外壳对电磁骚扰的保护度(EM规程)
【标准号】:IEC61000-5-7-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-01
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC77C
【标准类型】:()
【标准水平】:()
【中文主题词】:保护设备;电磁学;抗干扰;安装说明;电磁兼容性;防护屏蔽;爆炸;无线电干扰;基础标准;电力设备;环境条件;核能;干扰抑制
【英文主题词】:Basicstandard;Degreesofprotection;Electricalinstallations;Electromagneticcompatibility;Electromagneticfields;Electromagnetism;EMC;Enclosures;Environmentalcondition;Explosions;Influencequantities;Installationinstructions;Interferenceprotection;Interferencesuppression;Marking;Nuclearenergy;Performancerequirements;Protectiondevices;Radiointerferences;Shields
【摘要】:ThispartofIEC61000describesperformancerequirements,testmethodsandclassificationproceduresfordegreesofprotectionprovidedbyemptyenclosuresagainstelectromagneticdisturbancesforfrequenciesbetween10kHzand40GHz.Theshieldingperformanceistobemeasuredpriortotheinstallationofinternalelectricaland/orelectronicequipmentandcomponents.ThisshieldingprotectionismeasuredforthepurposeofdemonstratingthattheenclosureprovidesadequateshieldingofelectromagneticenergytosupportacceptableperformanceofthecompleteassembledunitswhentestedtoapplicableIECstandards.However,itshouldbenotedthatsatisfactoryperformanceofanemptyenclosuredoesnotnecessarilyensurethatthecompletedunitswillpassallEMCperformanceteststandardsfortheoperatingequipment(seediscussioninannexA).Thepurposeofthisstandardistoprovidearepeatablemeansforevaluatingtheelectromagneticshieldingperformanceofemptymechanicalenclosures,includingcabinetsandsubracks,andtospecifyamarkingcodetoallowamanufacturertoselectanenclosurewithaknowncapabilityforattenuatingelectromagneticfields.Therequirementsforimmunitytovarioustypesofelectromagneticdisturbances,includinglightningandhigh-altitudeelectro-magneticpulse(HEMP)willneedtobeconsideredbymanufacturerswhendeterminingtheneedforapplicatiohofthisstandardforspecificequipmentandapplications,andforthespecificenclosureshieldingrequirementswhicharenecessaryasafunctionoffrequency.Theadoptionoftheclassificationsysteminthisstandardwill,wheneverpossible,promoteuniformityinmethodsofdescribingtheprotectionagainstelectromagneticstressesprovidedbytheenclosure.Thisincludesprotectionofequipmentinsidetheenclosurefromexternalelectromagneticstresses,aswellasprotectionofexternalequipmentfrominternallygeneratedelectromagneticstresses.TechnicalCommitteesresponsibleforenclosuresmaydecideontheextentandmannerinwhichtheclassificationdefinedinthisstandardisusedintheirstandardsandtodefine"enclosure"asitappliestotheirequipment.However,thetestsandperformancecategoriesmustnotdifferfromthosespecifiedinthisstandard.AninformativeguideforthedetailstobespecifiedinrelevantenclosureproductstandardsisgiveninannexB.
【中国标准分类号】:L06
【国际标准分类号】:33_100_20
【页数】:51P.;A4
【正文语种】:英语
【英文标准名称】:Carbonfibers.Determinationoflineardensity.
【原文标准名称】:碳纤维.线性密度的测定
【标准号】:NFT25-103-1987
【标准状态】:现行
【国别】:法国
【发布日期】:1987-09-01
【实施或试行日期】:1987-09-20
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:测定;矿物纤维;碳纤维;线密度;试验;测量
【英文主题词】:
【摘要】:
【中国标准分类号】:Q53
【国际标准分类号】:59_100_20
【页数】:3P.;A4
【正文语种】:其他
