SENSOR FOR MEASURING ELECTRICAL CHARACTERISTICS

摘要

According to the present invention, a sensor for measuring electrical characteristics is provided, comprising a voltage sensor and a current sensor. The voltage sensor comprises: a printed circuit board defining a round through-hole into which a power transmission line is inserted; a ring-shaped electrode fixed against the inner periphery of the through-hole to measure a voltage formed in the power transmission line; and a first terminal portion, one end of which contacts one side of the electrode and the other end of which is exposed through a side of the printed circuit board. The current sensor comprises: a pick up coil wound like a spring and bent along the outer periphery of the through-hole so as to form a doughnut shape when viewed from above, and arranged with at least a portion thereof embedded in the printed circuit board, wherein said pick up coil measures a current flowing in the power line by means of induced current; and a second terminal portion extending from both ends of the pick up coil and exposed through a side of the printed circuit board.