IEC 61800-3 AMD 1-2011 可调速电力驱动系统.第3部分:EMC要求和特殊试验法
时间:2024-05-07 20:48:42 来源: 标准资料网 作者：标准资料网 阅读：9836
【英文标准名称】:Adjustablespeedelectricalpowerdrivesystems-Part3:EMCrequirementsandspecifictestmethods
【原文标准名称】:可调速电力驱动系统.第3部分:EMC要求和特殊试验法
【标准号】:IEC61800-3AMD1-2011
【标准状态】:现行
【国别】:国际
【发布日期】:2011-11
【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/SC22G
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Commonmode;Conditions;Connections;Control;Definitions;Distortion;Drivesystems;Effects;Electricconvertors;Electricmotors;Electricalengineering;Electricaltransmissionsystems;Electromagnetic;Electromagneticcompatibility;Electromagnetictests;Electromagnetism;EMC;Environment;Filtermethods;Fluctuation;Frequencies;Interferencelevels;Interferencerejections;Interferences;Interferingemissions;Interruptions;Limits(mathematics);Loading;Lowfrequencies;Lowvoltage;Magneticfields;Mathematicalcalculations;Measurement;Measurementconditions;Measuringequipment;Measuringtechniques;Minimumrequirements;Normaloperation;Operation;Operationallocation;Overviews;Performance;Performanceinservice;Powerdrives;Powertransmissionsystems;Protectivemeasures;Radiation;Revolutioncontrols;Rotationalspeeds;Safety;Safetyengineering;Safetyrequirements;Semiconductorpowerconvertors;Short-time;Signaltransmission;Statistics;Supplysystems;Testing;Vibration;Voltage;Voltagedips;Voltagedrops
【摘要】:
【中国标准分类号】:K20
【国际标准分类号】:29_200;33_100_01
【页数】:37P;A4
【正文语种】:英语
MIL-B-3990D (AMENDMENT 3), MILITARY SPECIFICATION: BEARINGS, ROLLER, NEEDLE, AIRFRAME, ANTIFRICTION, INCH (21 AUG 1991) [S/S BY SAE-AS39901]., This specification covers the requirements for non-separable, antifriction needle bearings.【英文标准名称】:StandardPracticeforSamplingPhytoplanktonwithConicalTowNets
【原文标准名称】:用圆锥拖网取样可繁殖海洋浮游生物的标准实施规程
【标准号】:ASTMD4132-1982(2004)
【标准状态】:现行
【国别】:
【发布日期】:1982
【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】:E47.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:资源取回;浮游生物;抽样方法;渔网;污染控制;水质
【英文主题词】:
【摘要】:Theadvantagesofconicaltownetsareasfollows:3.1.1Theyarerelativelyinexpensive,easytoconstruct,andhighlyversatileinavarietyofsurfacewaters.3.1.2Theycanbeusedfromasmallpoweredboatwithaminimumofauxiliaryequipment.3.1.3Theyprovideasimplemeansbywhichtocollectqualitativesamplesofmacro-andmicro-plankton.3.1.4Theycanbeadaptedwithaflowmetertocollectsemiquantitativesamplesofmacro-andmicro-plankton.Thedisadvantagesofconicaltownetsareasfollows:3.2.1Theyareeffectiveonlywheredrawnthroughastratumofwaterhavingconsiderablethickness.Theyarenotsuitableforcollectingsamplesfromasmallorrestrictedregion.3.2.2Theyarenotsuitableforcollectionsinveryshallowwater.3.2.3Theycollectonlyqualitativesamples,orsemiquantitativesampleswhenusedwithaflowmeter.3.2.4Cloggingofthenetbyextraneousmaterials,suchasfloatingvascularplantsordebriscancauseerroneousresults.3.2.5Ifdiscretedepthsaresampledusingahorizontaltow,thesamplecanbecontaminatedwithorganismsfromotherdepthsduringthedeploymentandretrievalofthesamples.Thereareseveralspecialconsiderationsthatshallbeobservedwhenusingconicaltownets.Theyareasfollows:3.3.1Theconicalnetsamplersaredesignedtobetowedatspeedslessthan3knots;however,greaterspeedshavebeenusedforthelargernetswithaconcomitantincreaseincapture.3.3.2Althoughthereisatendencytousethesmallestmeshsizeavailable,thereistheliabilityofsmallmeshsizesreducingthecollectionefficiencyandincreasingequipmentfailurethroughtearing.3.3.3Ifdiscretedepthsamplesarerequired,anopeningandclosingnetdeviceshouldbeinstalledonthesampler.3.3.4Thenetsshouldbewashedfrequentlyandinspectedforpin-sizeholes,tears,netdeterioration,andotheranomalies.3.3.5Followinguse,wetnetsshouldbesuspendedfulllengthinairandinsubduedlightandallowedtodry.1.1Thispracticecoverstheproceduresforobtainingqualitativesamplesofaphytoplanktoncommunitybyuseofconicaltownets.Netswillnotretainallphytoplanktontaxa;forexample,nannoplanktonandultraplanktongenerallywillpassthroughanet.1.1Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:
【页数】:2P.;A4
【正文语种】: