simsmy 发表于 2009-3-18 10:31:14

GR468中的UNC评定

我想请教一下，在GR-468中经常在表格的Applicability里面有UNCapplication或COapplication(gr-468-core2table4-5)
不知道对CO和UNC是怎么评定分级的？

安德维京 发表于 2009-3-18 11:06:41

CO和UNC是指不同的应用环境，CO＝centreoffice，UNC＝uncontrol
在GR-468-COREIssue2中1.5.3OperatingEnvironments就是专门介绍这个的。具体如下：
1.5.3.1COEnvironment
ACOenvironment,asdescribedinGR-63-CORE,restrictslong-termambienttemperaturestoarangeof+5to+40°C.Inaddition,GR-63-COREindicatesthatforshortperiods(i.e.,upto96consecutivehours,andforatotalofnomorethan15daysperyear),temperaturesmaygoaslowas–5°Corashighas+50°C.Thesesamelimitscanbeachievedatremotesiteswithappropriateenvironmentalcontrols,asinthecaseofControlledEnvironmentVaults(CEVs).Therefore,“CO”isusedthroughoutthisdocumenttorefertobothCentralOfficeandothercontrolledenvironments.
1.5.3.2UNCEnvironment
Asusedhere,UNCenvironmentsexhibitconditionsthatdonotmeetthecriteriaforCOenvironmentsdescribedinSection1.5.3.1.ThetemperatureextremesforaUNCenvironmentarebasedonthecriteriainGR-487-CORE,GenericRequirementsforElectronicEquipmentCabinets.Thatdocumentdefinesatemperaturerangeof–40°Cto+46°Cfortheairtemperatureoutsideofanenclosure.Inaddition,itisgenerallyassumedthatinsidetheenclosuretheairtemperaturesurroundingtheequipmentcanreach+65°Cundermaximumsolarloadingandequipmentpowerdissipation.6AnexampleofaUNCenvironmentwouldbeapedestal(suchastheopticalnetworkunitofanFITLsystem).

dahaish_ZI6HX 发表于 2020-11-25 14:38:29

:):):):):):):):):):)
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