| 摘要 |
<p>The switch gear module is able to be withdrawn and is positioned within its fixed receiving compartment, on horizontal slides, by a transverse actuating shaft (28). This is rotated, using a detachable crank handle engaged in the end socket (25) of a drive-shaft (22), through a worm gear (24,29) in the mechanism housing outside the compartment side-plate (12). Access to the handle socket is controlled by a lock-plate (30,31), spring-biassed (32) downwards. A ramp (35) normally allows the handle to raise the plate and enter the socket. The lock-plate is subject to control by two levers (62,72) on a common pivot (19). Their rear ends (e.g. 75) bear on notched cams (e.g. 77) fixed coaxial to the actuating shaft. The cam notches correspond to preselected positions of the switch gear module - e.g. fully inserted, test, fully withdrawn. Using a reversible link (40), the operator activates one lever, the other remaining idle, to select one or other set of positions to be reached by cranking. A ring-ended auxiliary bar (50), associated with the lock-plate, is free to be pulled out at appropriate locations to allow a padlock conferring operational security to be applied.</p> |
