| 单词 | throw-over relay |
| 释义 | > as lemmasthrow-over relay 2. Designating equipment for switching from one circuit, power source, or set of connections to another, as throw-over relay, throw-over switch, etc. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > circuit > short-circuit > [noun] > connection or disconnection > switch for throw-over switch1889 1889 Electr. Engineer 13 Dec. 474/2 Double throw-over switches are connected so that each alternating-current machine can be connected to either of two exciters, and so that any main circuit can be run from any machine. 1919 Wireless World 7 40/1 A simple differential indicator operated by a throw-over switch. 1935 Electr. Engin. (U.S.) 54 111/1 A spare unit with proper throw-over relays is provided for emergency use in the event the regular set fails. 1967 Proc. Inst. Electr. Engineers 114 1919/1 These buildings will be fed from small groups (up to five) of 12-5kV lines with semiautomatic throwover devices at the building to provide for a line outage. 2007 A. J. Pansini Electr. Distribution Engin. (ed. 3) vii. 294 In other instances, the station transformer may be equipped with a throwover switch, operated manually or automatically, in order to improve the reliability of the supply of auxiliary power. < as lemmas |
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