| 单词 | pilot wire |
| 释义 | > as lemmaspilot wire pilot wire n. an auxiliary electrical wire or cable for conveying information about an associated power line or telegraph line or for operating apparatus connected with one. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrical power, electricity > distribution system > [noun] > cable > auxiliary cable pilot wire1890 pilot cable1912 pilot1940 1890 J. W. Urquhart Electr. Light Fitting (ed. 3) x. 321 It is far more important to be informed as to the actual potential of the mains at the various points of consumption. For low tension constant current systems this is usually accomplished by the use of ‘pilot wires’. 1930 Engineering 12 Sept. 347/1 An examination of the available protective schemes not involving the use of pilot wires had shown that a close approximation to the performance of pilot protective gear could be obtained by the use of distance relays. 1968 P. J. Freeman Electr. Power x. 275 On long sections the capacitance currents between the pilot wires may be high enough to operate the relay, causing instability. < as lemmas |
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