| 摘要 |
1,112,456. Switchboards. ELEKTROSCHALTERATE GRIMMA, VEB. 6 Jan., 1967, No. 849/67. Heading H1N. [Also in Division H2] In a prefabricated bus-bar unit for use in an enclosed electrical distribution installation four bus-bars 1, which may be of like or different sizes, serving a three-phase with neutral system and screwed on to common bus-bar supports 3, have connection bars 2 permanently welded at right angles to them. The bus-bar unit can be made of copper or aluminium, the tungsten electrode inert gas shielded arc welding process being used. Electrical apparatus may be mounted above (9) or to one side (5) of the unit in a box, Fig. 1 (not shown). |
