专利名称：Multifunction intelligent electronic device
and method
发明人：Gamvrelis, Metaxas,Poda, Sigismund申请号：EP02255123.8申请日：20020722公开号：EP1385013A1公开日：20040128
专利附图：
摘要：A multifunction intelligent electronic device (IED) 10 monitors and reportssignals including utility metering, harmonic spectrum, digital fault recording (DFR), andsupervisory control and data acquisition (SCADA) functions. The IED includes an A.C.
subsystem (82) , a digital signal processing system (84) for processing data received bythe A.C. subsystem, and a microprocessor system (86) for controlling various functions ofthe IED. The IED is capable of direct connection to a field sensor on a distribution circuit.The A.C. subsystem (82) of the IED includes a plurality of transformers (T1, T2, T3), eachtransformer operating with respect to one phase (phase 1, phase 2, phase 3) of a powerline, and a plurality of switching circuits (U2, U3, U4), each switching circuit is coupled to arespective transformer and capable of switching to first or second positions dependingon whether the current at the primary circuit of a respective transformer is in a meteringrange or in an overcurrent (DFR) range.
申请人：GENERAL ELECTRIC COMPANY
地址：1 River Road Schenectady, NY 12345 US
国籍：US
代理机构：Pedder, James Cuthbert
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