| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a zero phase current transformer whose winding cost is low, remaining voltage during load current energization is small and output sensitivity to zero phase current is high. SOLUTION: This zero phase current transformer has a core whose hollow part which has a lamination structure of strip-like magnetic plates 1a, 1b, 1c, 1d is rectangular, bobbin coils 2a, 2b, 2c, 2d formed by winding a coil on a bobbin set in each of four sides of the core and conductors 3a, 3b, 3c passing through a hollow part surface of a core vertically. A core has a lamination structure of strip-like magnetic plates 1a to 1d and a junction method of strip- like magnetic plates thereof is a double lap joint or a butt lap joint.</p> |
