专利名称：METHOD AND DEVICE FOR MEASURING
IMPEDANCE IN ALTERNATING CURRENTNETWORKS AND METHOD AND DEVICE FORPREVENTING THE FORMATION OFSEPARATE NETWORKS
发明人：KOELN, KLAUS-WILHELM申请号：EP95928989.0申请日：19950826公开号：EP0783702A1公开日：19970716
摘要：The present invention concerns a method and device for measuring impedancein alternating current systems and an application, based thereon, i.e. the prevention ofuncontrolled separate networks by monitoring impedance. Electrical quantities aredetermined and exploited. A reactive current is generated at intervals in the alternatingcurrent network. The phase shift of the voltage without reactive current is measuredrelative to the voltage with reactive current and a network impedance is determined fromthe phase shift. In order to prevent uncontrolled separate networks, the impedance ismonitored and the subnetwork is separated if the impedance changes abruptly.
申请人：KOELN, KLAUS-WILHELM
地址：Dorfstrasse 16 D-39615 Wanzer DE
国籍：DE
代理机构：Kuczka, Detlef Dr., Dipl.-Ing.
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