MIL-T-6945A (NOTICE 2)
时间:2024-05-07 06:55:34 来源: 标准资料网 作者：标准资料网 阅读：8585
MIL-T-6945A (NOTICE 2), MILITARY SPECIFICATION: TUBING, BRASS SEAMLESS (05 MAR 1999) [S/S BY ASTM-B135]., MIL-T-6945A, dated 13 February 1984, is hereby canceled. Future acquisition of CompositionsII and III (UNS C26000 and UNS C33000, respectively) should refer to ASTM B135, StandardSpecification for Seamless Brass Tube. Composition I (UNS C46400, C46500, or C46600) is nolonger available as tubing.Additional information regarding availability of brass tubing may be obtained from the CopperDevelopment Association (CDA), 260 Madison Avenue, New York, NY 10016-2401.(Application for copies of ASTM publications should be addressed to the American Society forTesting and Materials, 100 Barr Harbor Drive, West Conshohocken, PA. 19428-2959)
基本信息
| 标准名称： | 冲模零件及其技术条件 冲模侧刃和导料装置 导料板 |
| 中标分类： |
机械 >>
工艺装备 >>
模具 |
| 替代情况： | 替代原标准号GB 2865.5-1981;被JB/T 7648.5-2008代替 |
| 发布部门： | 模具标委会 |
| 发布日期： | 1994-12-09 |
| 实施日期： | 1995-06-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2008-07-01 |
| 归口单位： | 模具标委会 |
| 出版日期： | 1900-01-01 |
| 页数： | 2 页 |
适用范围
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前言
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引用标准
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所属分类： 机械 工艺装备 模具
【英文标准名称】:Powerfrequencyovervoltageprotectivedeviceforhouseholdandsimilarapplications(POP)
【原文标准名称】:家用和类似用途的工频过电压保护装置(POP)
【标准号】:BSEN50550-2011
【标准状态】:现行
【国别】:英国
【发布日期】:2011-06-30
【实施或试行日期】:2011-06-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Accessories;Alternatingcurrent;Alternatingvoltages;Circuit-breakers;Classificationsystems;Contactsafetydevices;Definitions;Design;Differentialcurrentswitches;Differentialcurrents;Domesticelectricalinstallations;Earth-leakagecircuit-breakers;Electricappliances;Electricalengineering;Electricalinstallations;Electricalprotectionequipment;Electricalsafety;Electromagneticcompatibility;EMC;Faultcurrentbreakers;Faultcurrents;Houseinstallations;Householdequipment;Householduse;Inscription;Inspection;Lineswitches;Lowvoltage;Low-voltageequipment;Marking;Mountingmaterials;Overcurrentprotection;Powerfrequency;Productinformation;Properties;Protectionagainstelectricshocks;Protectiondevices;Residualcurrentoperatedcircuit-breakers;Self-actingcircuit-breakers;Switches;Switchgear;Testing;Trippingmechanisms(circuit-breakers)
【摘要】:ThisEuropeanStandardappliestopowerfrequencyovervoltageprotectiondevices(hereafterreferredtoas“POP”)forhouseholdandsimilaruses,witharatedfrequencyof50Hz,aratedvoltage230Va.c.(betweenphaseandneutral),intendedtobeusedincombinationwithamainprotectivedevicebeingeitheraCBincompliancewithEN60898-1orEN60898-2,aRCCBincompliancewithEN61008-1oraRCBOincompliancewithEN61009-1.NOTE1RequirementsforPOPsincombinationwithswitchingdevicesotherthanamainprotectivedevice,oraPOPintegratedinaMPD,areunderconsideration.NOTE2RequirementsforPOPwithfunctionalearthconnectionregardingtemporaryovervoltagewithstandareunderconsideration.NOTE3APOPisnotaprotectivedevicetobeusedforautomaticdisconnectionofthesupplyinthemeaningofHD60364-4-41.Theyareintendedforuseinanenvironmentwithpollutiondegree2andovervoltagecategoryIII.Theycanbedesignedforfactoryassemblyorforassemblyonsite.Thesedevicesareintendedtomitigatetheeffectsofpowerfrequencyovervoltagesbetweenphaseandneutralconductor(e.g.causedbylossofneutralconductorinthethreephasesupplyupstreamthePOP)fordownstreamequipmentbyactuatingthemainprotectivedevicewhenanovervoltagebetweenphaseandneutralisdetected.NOTE4TomitigatemeansinthiscontextthatthePOPwillprovideprotectioninmostcasesofpowerfrequencyovervoltages.NOTE5Protectionincaseofovervoltagebetweenphasesisunderconsideration.Incaseofphasetophaseelectricalsupplysystemwithratedvoltagebetweenphases230Va.c.andnoneutralconductor,onelinemonitoredPOPincompliancetothisstandardcanbeusedaccordingtomanufacturer’sinstruction.ThePOPdoesnotimpairtheprotectivefunctionofthemainprotectivedevice.ThisEuropeanStandarddoesnotapplyforprotectionagainstcommonmodeovervoltages.ThisEuropeanStandarddoesnotapplytosurgeprotectivedevices.ThisEuropeanStandardstates:–thedefinitionsoftermsusedforPOP(Clause3);–theclassificationofPOP(Clause4);–thecharacteristicsofPOP(Clause5);–thepreferredvaluesoftheoperatingandinfluencingquantities(Clause5);–themarkingandinformationtobeprovidedforPOP(Clause6);–thestandardconditionsforinstallationandoperationinservice(Clause7);–therequirementsforconstructionandoperation(Clause8);–thelistofminimumrequirementstobetested(Clause9).
【中国标准分类号】:K31
【国际标准分类号】:29_120_50
【页数】:50P.;A4
【正文语种】:英语