1784-PCIDS1784-PCIDS1784-PCIDS3.辅助电源的规格－－-交流电流变送器为了***检测输入电流的变化，也为了能输出与输入电流成线性变化的直流信号，通常需要一个辅助电源***为电流变送器的工作电源。通常，选用***多的是容易获得的AC220V。也可以选择直流电源,比如：DC24V等等。需要注意的是，有一些电流变送器，宣称不需要辅助电源，即所谓的“无源型”电流变送器。对这种电流变送器，应该慎重选用。所谓“无源型”，并非是不需要电源，而是由电流变送器输出信号后面的仪表提供工作电源。是“吃了变送器后面的仪表电源”。自然增加了变送器后面采集仪表的负担。还有一种“无源型电流变送器”，是利用电流互感器的二次电流做变送器的电源。这种变送器的缺点是，当负载电流较小时，电流互感器的输出电流自然较小，所提供给变送器的能量也减少，此时，电流变送器将产生非线性误差，从而照成电流信号变送的误差，所以，这种变送器也是需要慎重采用的。【***】【诚信】【创新】【合作】【共赢】厦门泰尼电气有限公司【产品质量】原装进口***【检测标准】按原厂标准【产品质保】1年【快递时间】24小时到【联系我们】＆业务经理：小黄＆洽谈电话：0592-6809319/18950191386＆商务***：2917675397＆传真（FAX)：0592-6890859（请注明，01006收）＆公司全称：厦门泰尼电气有限公司＆公司地址：厦门市海沧区海沧街道滨湖一里1号楼NortelI2002POEIPPhoneNTDU91BB70NTDU91CharcoalNortelNTRH30AARLSE15NortelNTCA06ZKS/DMSOC192OPTTRMTRNortelBayNetworksBLN/BCN1000B-LXFRE4-PPCAG2204026NortelBCMDigitalDrop&InsertMUXMediaBayModuleNortelAL1001a05-e5BayStack5520-48SwitchNortelNT5C05CE61200ARectifierNortelBusinessPhoneSystemPackage#4w/1yrWarrantyNortelAL1001E06-e5BAYSTACK552024PORTSWITCHnewNortelBCM4004.0BaseSystem-Standard-NT7B10AAFVNortelNetworksOpteraMetro5200NT0H50AANortelAL1001e05-e5BayStack5520-48routingswitchNORTELPassport8006ChassisDS1402002Nortel,NTC06621KTE6BCM4004.0TO6.0H/WANDS/WUPNortelBLN-25280QuadPortSynchronousLinkModuleNortelNorstarCICS4x16Systemw/CallPilot100VoicemIBM32R1860-IBMNortelCopperGigabitEtheNortelBCM400PBXD***32+,DTM,GATM832HandsetsNortelNorthernMeridianMailNode1MEMVP/GSPESBCNTNortelBCM4003.7BCM400R3.780vm3ip2voipgatewayNortelI2004NonPoeNTEX00BANTEX00NortelOC3/STM-1MultimodeATM-IPFunctionProcessorNortelBCM2003.7BCM200R3.7Callcenter48vm32umIBM(32R1860)NortelLayer2/3CopperGbESwitchNortel,AL4500E02-E6ETHERNETROUTINGSWITCH4550TNortelNTCA15AAUniOSC1480/1510nmOSCCardNewNortelNT5D67CBE5RemoteMiniCarrierInterfaceT1NortelBCM4004.0BCM400R4.0R440vm2voipgwayMCDNNortelI2004NTDU82IconKeysCharcoalwpoeadaptorNortelI2004IPPhoneCharcoalBezelwPoeAdaptorNortelI2004NTDU82dualportipphonew/poeadaptorNewNortelNorstarT7316ET7316EPhoneNT8B27JAAANortelI2004NTDU82w/poeadaptorreplaceNTDU92BB70NORTELPASSPORT8692SFROUTINGMODULEDS1404065-E5MCKCitelE-7000T-RUM24PortNortel***aya7000RemoteNortelBCM450IPTelephony-32SeatCodeNTC01071KCNortelBCM450IPTelephonyClient-32SeatNTC01071KCNortelBayNetworks4-Port10/100b-TFRE4AG2204017BLNIbmNortelCopperGigabitEthernetSwitchModule-6XNortelEB1639A170-E5SecureSwitch4050EB1639170-E5Lotof(20)NEWNorstarNortelT7316ETelepNT8B27CharNORTELBASICCALLCENTERAUTHORIZATIONCODENORTELBCM50BASICCALLCENTERSWAUTHORIZATIONCODEAgilestar-AA1419066-E6-AS-ForNortel-NewinBoxNORTELACCELAR8624FXEXPANSIONMODULEDS1404005NortelDS1404065-e58692sfROUTINGSWITCHMODULELGAria-130LG-NortelPBXLoadedwithCa***NORTELETHERNETSWITCH470-48TWITH48AL2012E34E5NortelI2004NTDU82IconKeysCharcoalwPCPortPSNortelAL4500E12-e6POEroutingswitch4550T48portNortelI2004IPPhoneCharcoalBezelwPCPortPSNortel5520-24T-PWREthernetSwitchAL1001E06-E5~STSI***aya/Nortel4526T-PWR24-PortPoESwitchAL4500E13-E6NortelDigitalMobilityController320(NT7B65KK))