发明名称 |
FEHLERSTROMSCHUTZSCHALTER DER AUF PULSSTRÖME REAGIERT |
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). |
申请公布号 |
DE69621925(T2) |
申请公布日期 |
2003.02.06 |
申请号 |
DE1996621925T |
申请日期 |
1996.04.18 |
申请人 |
SCHNEIDER ELECTRIC INDUSTRIES SAS, RUEIL-MALMAISON |
发明人 |
BONNIAU, MICHEL;PAUPERT, MARC |
分类号 |
H01F1/153;H01H83/14;H01H83/22;H02H3/33;(IPC1-7):H01H83/14 |
主分类号 |
H01F1/153 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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