| 摘要 |
An isolation device for preventing insertion of a contact member, such as a fuse element, comprises an insert member and an actuating member. A lock secures the insert and actuating members together. The insert member has a projection which, in use, extends into a recess vacated by the contact member. A passage is provided in the insert member for receiving the actuating member. Movement of the actuating member along the passage causes lateral expansion of the projection so as to locate the isolation device on the electrical component. At its leading end the projection has a catch which in an unexpanded state of the projection passes through an aperture in a contact provided on the electrical component. In a laterally expanded state of the projection, the catch is prevented from passing through the aperture and thereby prevents removal of the isolation device from the electrical component.
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