MIL-L-15719A (AMENDMENT 3)
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MIL-L-15719A (AMENDMENT 3), MILITARY SPECIFICATION: LUBRICATING GREASE (HIGH TEMPERATURE, ELECTRIC MOTOR, BALL AND ROLLER BEARINGS) (21 FEB 1961).
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基本信息
| 标准名称： | 核电厂安全级电路电缆系统的设计和安装 |
| 替代情况： | 替代EJ/T 534-1991 |
| 发布部门： | 国家能源局 |
| 发布日期： | 2011-07-01 |
| 实施日期： | 2011-10-01 |
| 首发日期： | |
| 作废日期： | |
| 出版社： | 原子能出版社 |
| 出版日期： | 2011-10-01 |
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： 医药 卫生 劳动保护 卫生 劳动卫生 环保 保健与安全 职业安全 工业卫生
【英文标准名称】:StandardPracticeforConstructionandUseofaProbeforMeasuringElectricalContactResistance【原文标准名称】:电接触阻力测量用探头的制造和使用的标准实施规程
【标准号】:ASTMB667-1997(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:B02.11
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:接触电阻
【英文主题词】:contactresistance;electricalcontact;goldprobe;reliability;resistanceprobe;wireprobe;Electricalresistance/resistivity--electricalcontactmaterials;Electricalcontactmaterials;Probemethods
【摘要】:Electricalcontactresistanceisanimportantcharacteristicofthecontactincertaincomponents,suchasconnectors,switches,sliprings,andrelays.Ordinarily,contactresistanceisrequiredtobelowandstableforproperfunctioningofmanydevicesorapparatusinwhichthecomponentisused.Itismoreconvenienttodeterminecontactresistancewithaprobethantoincorporatethecontactmaterialintoanactualcomponentforthepurposeofmeasurement.However,iftheprobecontactmaterialisdifferentfromthatemployedinthecomponent,theresultsobtainedmaynotbeapplicabletothedevice.Informationoncontactresistanceisusefulinmaterialsdevelopment,infailureanalysisstudies,inthemanufacturingandqualitycontrolofcontactdevices,andinresearch.Contactresistanceisnotauniquesingle-valuedpropertyofamaterial.Itisaffectedbythemechanicalconditionsofthecontact,thegeometryandroughnessofcontactingsurfaces,surfacecleanliness,andcontacthistory,aswellasbythematerialpropertiesofhardnessandconductivityofbothcontactingmembers.Anobjectiveofthispracticeistodefineandcontrolmanyoftheknownvariablesinsuchawaythatvalidcomparisonsofthecontactpropertiesofmaterialscanbemade.Insometechniquesformeasuringcontactresistanceitisnotpossibletoeliminatebulkresistance,thatis,theresistanceofthemetalpiecescomprisingthecontactandtheresistanceofthewiresandconnectionsusedtointroducethetestcurrentintothesamples.Inthesecases,themeasurementisactuallyofanoverallresistance,whichisoftenconfusedwithcontactresistance.1.1Thispracticedescribesequipmentandtechniquesformeasuringelectricalcontactresistancewithaprobeandthepresentationofresults.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.ItistheresponsibilityoftheuserofthisstandardtobecomefamiliarwithallhazardsincludingthoseidentifiedintheappropriateMaterialSafetyDataSheet(MSDS)forthisproduct/materialasprovidedbythemanufacturer,toestablishappropriatesafetyandhealthpractices,anddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N25
【国际标准分类号】:17_220_20
【页数】:5P.;A4
【正文语种】:英语