| 摘要 |
<p>A current transformer (1) comprising a toroidal magnetic core (5) around which there is wound an even number of shielding coils (2 1 , 2 2 , 2 3 , 2 4 ). The shielding coils (2 1 , 2 2 , 2 3 , 2 4 ) are arranged two by two in order to form corresponding couples (3 1 , 3 2 ) and the two shielding coils of each couple are wound on opposite parts of the toroidal magnetic core (5). The shielding coils (2 1 -2 2 , 2 3 -2 4 ) in each couple (3 1 , 3 2 ) are connected in parallel to establish a respective magnetic flux in each coil, wherein the magnetic flux in a first shielding coil (2 1 , 2 3 ) of each couple (3 1 , 3 2 ,) has an opposite direction with respect to the magnetic flux in a second shielding coil (2 2 , 2 4 ) of each couple (3 1 , 3 2 ), and the couples are connected in series.</p> |
