首页>
外国专利>
CURRENT TRANSFORMER, IN PARTICULAR FOR A FAULT CURRENT TRIPPING DEVICE SENSITIVE TO PULSATING CURRENTS AND TRIPPING DEVICE EQUIPPED WITH SUCH A TRANSFORMER
CURRENT TRANSFORMER, IN PARTICULAR FOR A FAULT CURRENT TRIPPING DEVICE SENSITIVE TO PULSATING CURRENTS AND TRIPPING DEVICE EQUIPPED WITH SUCH A TRANSFORMER
展开▼
机译:电流互感器,特别是用于故障脉动跳闸装置的装置,该装置对脉动电流和装有这种变压器的跳闸装置敏感
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention concerns a current transformer (1) which comprises essentially a torus (2) with a magnetic core, primary windings formed by the active conductors of an electrical installation to be protected, and a secondary winding (3) at whose terminals a differential fault signal is produced when a differential fault occurs in the primary windings. The transformer (1) is characterized in that the magnetic core of the torus has a ratio between the dynamic induction increase at 400 Hz and the dynamic induction increase at 50 Hz of more than 0.7 for a field intensity amplitude of approximately 35 mAt/cm. The tripping device (D) comprises a transformer (1) of the above type, a tripping relay (4) and a secondary circuit (5) connecting the relay (4) to the transformer (1). The secondary circuit (5) has a capacitor connected in series with the secondary winding (3) or a full wave rectifier (6, 7).
展开▼