| 摘要 |
An electrical distribution board comprises, in fixed spatial relationship, a DIN rail constituted by a pair of separate rail elements constituting the functional edges of the DIN rail and a busbar. The DIN rail and the busbar serve to mount an electrical protective device (such, for example, as an MCB). One of the rail elements of the DIN rail is pivotally movable from a position of engagement with a locating formation of an electrical protective device to permit easy fitment of the device to the distribution board, or removal therefrom, without requiring disconnection of the busbar from the board. As a result the known difficulties of mounting and dismounting DIN rail mounted circuit protective devices in the presence of a fixed busbar in factory built assemblies are avoided. |
