【英文标准名称】:Electricalsafetyinlowvoltagedistributionsystemsupto1000Va.c.and1500Vd.c.Equipmentfortesting,measuringormonitoringofprotectivemeasures-InsulationmonitoringdevicesforITsystems
【原文标准名称】:防护测量的试验、测量或监测设备用交流不大于1000V、直流不大于1500V的低压配电系统的电气安全性.IT系统用绝缘监测设备
【标准号】:BSEN61557-8-1997
【标准状态】:作废
【国别】:英国
【发布日期】:1997-06-15
【实施或试行日期】:1997-06-15
【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】:计算机网络;电阻测量;电学测量仪表;电气试验;电气安全;低压电器;安全装置;使用说明;响应时间;防护电气设备;阻抗;额定电压;定型试验;电绝缘;情报系统;阻抗测量;外观检查(试验);电阻;低电压;作标记;电气保护设备
【英文主题词】:Alternatingcurrentnetworks;Communicationnetworks;Definition;Definitions;Directcurrentinstallations;Directcurrentnetworks;Electricalengineering;Electricalsafety;Electromagnetictests;Inscription;Installationsforratedvoltages;Insulatingmonitoringdevices;Insulatingresistance;Insulations;Lowvoltagemains;Low-voltageinstallations;Measuringequipment;Operatinginstructions;Specification(approval);Telecommunications;Testing
【摘要】:ThispartofIEC1557specifiestherequirementsforinsulationmonitoringdeviceswhichpermanentlymonitortheinsulationresistancetoearthofunearthedITa.c.systems,forITa.c.systemswithgalvanicallyconnectedd.c.circuitshavingnominalvoltagesupto1000Va.c,aswellasofunearthedITd.c.systemswithvoltagesupto1500Vd.c.independentfromthemethodofmeasuring.NOTES1ITsystemsaredescribedinIEC364-4-41amongstotherliterature.Additionaldataforaselectionofdevicesinotherstandardsistobenoted.2VariousstandardsspecifytheuseofinsulationmonitoringdevicesonITsystems.Insuchcases,theobjectiveoftheequipmentistosignaladropininsulationresistancebelowaminimumlimit.3InsulationmonitoringdevicesaccordingtothispartofIEC1557mayalsobeusedforde-energizedelectricalsystems.
【中国标准分类号】:K04
【国际标准分类号】:17_220_20
【页数】:18P.;A4
【正文语种】:英语


【英文标准名称】:Ophthalmicinstruments-Indirectophthalmoscopes(ISO10943:2006)EnglishversionofDINENISO10943:2006-08
【原文标准名称】:眼科仪器.间接检眼镜
【标准号】:ENISO10943-2006
【标准状态】:现行
【国别】:
【发布日期】:2006-08
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:分类;定义;诊断设备;手动装置;间接的;使用说明;仪器;极限(数学);作标记;眼科光学;眼科设备;眼科试验设备;眼科学;眼膜曲率计;眼膜曲率镜;光学仪器;光发散;光学;合格试验;规范(验收);试验设备;试验
【英文主题词】:Classification;Definition;Definitions;Diagnosticequipment;Hand-operateddevices;Indirect;Instructionsforuse;Instruments;Limits(mathematics);Marking;Ophtalmicoptics;Ophthalmicequipment;Ophthalmictestequipment;Ophthalmology;Ophthalmometers;Ophthalmoscopes;Opticalinstruments;Opticalradiation;Optics;Qualificationtests;Specification(approval);Testequipment;Testing
【摘要】:
【中国标准分类号】:C32
【国际标准分类号】:11_040_70
【页数】:11P.;A4
【正文语种】:英语