| 摘要 |
<p>PURPOSE:To reduce the rate of defectives due to falling of devices when they receive an external force by providing supporting legs at winding leading-out parts in such a way that the legs are almost parallel to the through hole axis of a primary conduc tor; besides, the base face of each leg extends on the extension of a contact face between a current transformer and a wiring board. CONSTITUTION:In a current transformer 1, a core consisting of a soft magnetic mate rial is housed in a core case which is provided to protect the core and winding is performed on the core case. Further, its core is accommodated in a protective case and then, cast molding of its casing is performed with resin. After making its resin set, the core is installed directly to a board 6. Then, the through hole 2 of a primary conductor, a winding leading-out part 3, lead wires 4 are fixed to the board 6 with soldered parts 5 and the like. In this way, supporting legs 8 are provided at the side of the leading-out part 3 in the current transformer 1 in such a way as to allow the legs to be almost parallel to an axis of the through hole 2; besides, the base face of each leg extends on the extension of a contact face 7 between the transformer 1 and the board 6 on which the above transformer is mounted. Although a falling of this device to the side of the leading-out part 3 is noted as a shortcoming when the device is installed vertically, the supporting legs 8 thus prevent the above falling.</p> |
