| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain sufficient characteristics as a zero-phase current transformer and simply produce a core by passing two-phase prim. conductors through an annular core of this transformer via bends. SOLUTION: An annular core 37 of a zero-phase current transformer is stacked parallel on annular cores 25 of two current transformers 26 laid on the same surface. One-phase prim. conductor 29 pierces the core 37 of the transformer 36 only. Twophase prim. conductors 29 pierce the cores 25 of both transformers 26 and also the core 37 of the zero-phase transformer 36 via bends 38. The cores 25 of the transformers 26 and core 37 of the transformer 36 are covered en bloc with a mold 39. Thus it is possible to obtain characteristics enough as a zero-phase current transformer and easily produce the core.</p> |
