| 摘要 |
PROBLEM TO BE SOLVED: To calibrate a detection element under actual working conditions.SOLUTION: A current detection device according to the present invention comprises: a housing in which a bus bar is installed; a mounting circuit board on which is mounted a detection element for detecting a magnetic flux generated due to that a current flows to the bus bar; a circuit board installation part formed in the housing and having a circuit board support wall for supporting the mounting circuit board so that the detection element is disposed near the bus bar, a circumferential wall for enclosing the mounting circuit board supported by the circuit board support wall, and an opening formed at a position facing the circuit board support wall; a magnetic shield plate disposed in the circuit board installation part together with the mounting circuit board and disposed closer to the opening side than to the mounting circuit board; and a plurality of locking claws extending to the inner circumferential side of the circumferential wall and securing, by pressing, the mounting circuit board and the magnetic shield plate to the circuit board support wall. The mounting circuit board has a connection part for calibration in its part that does not overlap with the magnetic shield plate. |
