| 单词 | impedance bond |
| 释义 | > as lemmasimpedance bond impedance bond n. a kind of rail bond used to connect electrified rails in adjoining signalling sections, having a low resistance (so that the direct traction current can pass unhindered) and a high inductance (so that the alternating signalling currents are confined to their respective sections). ΘΚΠ society > travel > rail travel > railway system or organization > [noun] > track > types of rail > conductor rail on electric railway > parts and fittings of ramp1885 impedance bond1926 1926 C. F. Harding & D. D. Ewing Electr. Railway Engin. (ed. 3) xix. 258 The development of the two-rail signal system making use of impedance bonds..marked the beginning of a new era in the development of the new railway signal systems. Practically all of the automatic block signals which are being installed on both alternating- and direct-current railways at present are of this general type. 1967 G. F. Fiennes I tried to run Railway v. 49 Installing impedance bonds in the track. < as lemmas |
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