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Automatic dropping device (add)
| Глоссарий в железнодорожной технике |
Mechanism which causes a damaged or displaced pantograph to drop automatically to limit (further) damage to the overhead line equipment.rt
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Pantograph, английский
- An apparatus fixed to the roof of electric traction vehicles to draw current from the overhead supply.
- A scissors-like mechanism used for raising and lowering studio lights. other devices can also perform the same function, sometimes better.
- A drafting instrument for copying drawings, plans, etc., either on the same scale or on an enlarged or a reduced scale. pantry 1. a serving room between kitchen and dining space. 2. a room for storage of food supplies; a larder. 3. a room for preparing refreshments, not complete meals.
- Пантограф
- An instrument to copy or reduce drawings.
- Folding traction current collection device mounted on the roof of a vehicle on a railway employing an overhead supply system. nowadays, pantographs are sophisticated aero-dynamically designed devices which can operate at high speeds without loss of contact and with built-in safety devices which reduce the risk of damage to wires in the event of a fault. a common problem is when a pantograph catches above the wire and pulls it down for considerable distances before it is noticed by the crew and the train stopped. modern pantographs are fitted with automatic detection and lowering devices. the horns (curved edges) of the pantograph are equipped with frangible pneumatic sensors which, if broken by a wire support, cause the detector system to lower the pantograph.
- On train equipment for collecting electricity from overhead power cables.
Automatically, английский
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Resistance control, английский
Method of traction motor control formerly almost universal on dc electric. for more information see the electric traction pages page.
Point locks, английский
Mechanical devices attached to points to ensure that they remain fixed for the passage of a train through them. in many countries, they are a legal requirement where passenger trains are operated. points are also electrically locked by their control system and by track circuits occupied by a train passing through them (detection).
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