| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact and inexpensive current sensor capable of measuring a DC and AC value flowing through each branch of a distribution board by minimizing errors due to a disturbance magnetic field.SOLUTION: A current sensor 5a includes: a magnetic sensor 1a; a pair of conductors 2a and 3a of two current lines through which branch current flows; and a magnetic substance core 4a. A current sensor 5b includes: a magnetic sensor 1b; a pair of conductors 2b and 3b of two current lines through which the branch current flows; and a magnetic substance core 4b. A current sensor 5c includes: a magnetic sensor 1c; a pair of conductors 2c and 3c of two current lines through which the branch current flows; and a magnetic substance core 4c. Here, a distribution board is constituted so that the branch current in the positive/negative reverse direction flows through the conductors 2a-2c and conductors 3a-3c. Moreover, the circumference of the magnetic sensor 1a is completely covered with the magnetic substance core 4a. |
