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|Russian to English translations [PRO]|
Tech/Engineering - Transport / Transportation / Shipping
|Russian term or phrase: набрать позиции|
|О том, что позиция набрана, свидетельствуют появление тока на тяговых двигателях и их характерный шум. На некоторых моделях электровозов есть табло, показывающие текущую позицию. После того, как позиция набрана, следует контроллер снова перевести в нейтральное положение. Для дальнейшего набора позиций контроллер снова переводят на риску “I” (позиции набираются по одной) или на “II” и так далее, то есть позиции будут набиратся по 2, 3 или 4. После набора нужного числа позиций контроллер снова переводят в нейтральное положение. Для сброса позиций контроллер поворачивают против часовой стрелки, и позиции начинают по одной сбрасыватся.|
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advance (in) run positions
North American locomotives, such as those built by EMD or General Electric, have nine throttle positions, one idle and eight power (as well as an emergency stop position that shuts down the prime mover). Many UK-built locomotives have a ten-position throttle. The power positions are often referred to by locomotive crews as "run 3" or "notch 7", depending upon the throttle setting.
In older locomotives, the throttle mechanism was ratcheted so that it was not possible to advance more than one power position at a time. The engine driver could not, for example, pull the throttle from notch 2 to notch 4 without stopping at notch 3. This feature was intended to prevent rough train handling due to abrupt power increases caused by rapid throttle motion ("throttle stripping," an operating rules violation on many railroads). Modern locomotives no longer have this restriction, as their control systems are able to smoothly modulate power and avoid sudden changes in train loading regardless of how the engine driver operates the controls.
When the throttle is in the idle position, the prime mover will be receiving minimal fuel, causing it to idle at low RPM. In addition, the traction motors will not be connected to the main generator and the generator's field windings will not be excited (energized) — the generator will not produce electricity with no excitation. Therefore, the locomotive will be in "neutral". Conceptually, this is the same as placing an automobile's transmission into neutral while the engine is running.
Each run position controls how much current and voltage are generated by preset diesel engine RPM and generator/alternator settings. One of the fun things to do as you drive alongside a working diesel at speed is to listen to how the engineer notches the throttle up and down to compensate for train and terrain dynamics. Of course you can press the 2 key while running Train Simulator and get the same effect.
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