| 摘要 |
The invention relates to a current transformer for three-phase systems and it used to detect currents, for example with three-phase current meters or electronic devices which trigger low voltage protection breakers. The invention aims at developing a current transformer that can be produced and fixed in a simple and low cost fashion and permitting to measure total current. Therefore, four mutually spaced apart, parallel, identical cylindrical conversion coils (4-7) are provided. In each case, a three-phase current lead (1, 2, 3) runs between two conversion coils (4-5, 5-6, 6-7) arranged adjacent and substantially normal to their longitudinal axes (10). Conversion coils (4-7) are held headwise through two low coercivity yokes (8, 9) extending in their longitudinal axes plane.
|
