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专利名称：Device and method for the differential
protection and electrical apparatus includingsuch a device
发明人：TIAN, SIMON,BLANC, PATRICK,BERANGER,
BRUNO,FERNANDEZ, ERIC
申请号：EP04354031.9申请日：20040907公开号：EP1533880A1公开日：20050525
专利附图：
摘要：The device has an energizing circuit to energize a magnetic circuit (4) of a
differential current transformer (2) with an energizing signal (IE) at an excitationfrequency (F1). A control circuit is provided for controlling and changing the excitingfrequency and for providing the signal (IE) of the magnetic circuit with an excitingfrequency (F2). The frequency (F2) is different from the exciting frequency (F1).Independent claims are also included for the following: (A) an electrical apparatusincluding a differential protection device (B) a process of differential protection.
申请人：SCHNEIDER ELECTRIC INDUSTRIES SAS
地址：, boulevard Franklin Roosevelt 92500 Rueil-Malmaison FR
国籍：FR
代理机构：Tripodi, Paul
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