| 摘要 |
1299347 Power transmission systems WESTINGHOUSE ELECTRIC CORP 5 Feb 1970 [17 March 1969] 5489/70 Heading H2C [Also in Division H1] A power transmission system comprises an outer metallic pipe 28 containing a dielectric fluid under pressure, at least one high-voltage conductor 23 disposed along the axis of the pipe, a plurality of disc-type insulators (17, Fig. 3, not shown) spaced axially along the conductor 23 for supporting it, an enlarged expansion joint 19 extending radially outwardly from the pipe 28, and an insulating disc 21 extending into the joint 19 and having a perforated metallic cylindrical barrier member 25 at its outer periphery. The insulating disc 21 and the associated barrier member 25 serve to localize the damage in the eventof a fault or short-circuit, as the transient pressure caused in the gas enclosed is reduced by making the gas pass around the disc 21 and via the perforations in members 25. Additional venting holes (30. Fig. 5, not shown) may be provided in the conductor 23. The expansion joint 19 may be sealed in a gas-tight manner and the inner conductor 23 replaced by 3-phase conductors. |
