UL 497B BULLETIN-2007 UL安全标准.数据通信和火警信号电路用保护器

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【英文标准名称】:ULStandardforSafetyProtectorsforDataCommunicationsandFireAlarmCircuits
【原文标准名称】:UL安全标准.数据通信和火警信号电路用保护器
【标准号】:UL497BBULLETIN-2007
【标准状态】:现行
【国别】:美国
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国保险商实验所(US-UL)
【起草单位】:UL
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:1.1Theserequirementscoverprotectorsfordatacommunicationsandfire-alarmcircuits.1.2Ascoveredbytheserequirements,datacommunicationscircuitprotectorsandfire-alarmcircuitprotectorsconsistofsingle-andmultiple-pairair-gaparresters,gas-tubearresters,orsolid-statearresters,withorwithoutfusesorothervoltage-limitingdevices.Datacommunicationscircuitprotectorsandfire-alarmcircuitprotectorsareintendedtoprotectequipment,wiring,andpersonnelagainsttheeffectsofexcessivepotentialsandcurrentscausedbylightningincommunicationsalarm-initiatingoralarm-indicatingloopcircuits.1.3Thisstandarddoesnotcoverthefollowing:a)LightningprotectivedevicesfortheprotectionofprimarydistributionwiringsystemsandequipmentsuchasACbranchcircuitprotection.b)Antennadischargeunitsforradio-andtelevision-receivingappliances.c)Lightningconductorandairterminalsforconnectionoflightningrodsforbuildingprotection.d)Protectivedevicestobeusedontelephonelinesortelephonelinesconnectingtothetelecommunicationnetworks.1.4Aproductthatcontainsfeatures,characteristics,components,materials,orsystemsnewordifferentfromthoseinusewhenthestandardwasdeveloped,andthatinvolvesariskoffire,electricshock,orinjurytopersonsshallbeevaluatedusingtheappropriateadditionalcomponentandend-productrequirementsasdeterminednecessarytomaintainthelevelofsafetyfortheuseroftheproductasoriginallyanticipatedbytheintentofthisStandard.
【中国标准分类号】:K31
【国际标准分类号】:29_120_50
【页数】:
【正文语种】:英语