| 摘要 |
PROBLEM TO BE SOLVED: To provide a current sensor which facilitates automatic packaging for current transformers. SOLUTION: There are arranged a multi-layer structured board in more than one layer, a through-hole provided piercing the rear (3) through the surface (1) of the board, a coil (4) comprising a connection of wires on the surface and the rear via the through-hole and a wire pattern disposed through the coil and a voltage generated both ends of the coil is detected, when current flows through the wire pattern. |
