| 摘要 |
1,270,897. Switchgear structures. COQ N.V. 24 Sept., 1970 [5 Nov., 1969], No. 45593/70. Heading H1N. In metal clad switch-gear the application of an A.C. test potential only to the switchgear and a D.C. test potential only to the cable connected to the switchgear is enabled by the provision of a movable contact 21 which connects a contact 20 at the end of a cable terminal 18 member to a conducting element 8 supporting a fixed contact 32 of the normal isolating switch for the cable 13. The contact 21 is moved by an operating rod 34 which may be inserted through a hole in the metal casing after the removal of a cover-plate (not shown). The rod 34 and contact 21 have coupling elements 34a, 35 which may be screw-threaded. A peg 24 secured in the movable contact 21 engages in a groove which has a straight portion 25 and arcuate end portions 25a, 25b to enable the movable contact to be locked in its open and closed positions. The rod 34 when inserted may extend through the inner cylinder 9 of a capacitor. Fig. 1 (not shown) illustrates a single-phase duplicate busbar switchgear assembly including the above arrangement and provided with earthing switches. |
