样例视频记录
以下是本模块提供的视频样本的文字记录:
真的有两大类广泛使用的备用电力系统;发电机和UPS。我只是在本课程中寻址发电机。那么，什么是发电机？本课程中的发电机谈论是一种旋转机器，其通过设计，通过某种类型的电机或发动机以一定速度旋转时产生电力。该系统的发电机部分通常是非常坚固的可靠的装置，当操作时，在操作时，在与其馈送的系统的电压一致的电压下达到指定量的电流。如今，内置于大多数发电机中的电子调节装置，使其能够以难以区分的形式推出电力，该形式可从正常的效用供电中无法区分。在公用事业中断期间，在发电机中包括在发电机中的这种功率调节尤其重要，尤其重要。大多数发电机由内燃机旋转或旋转。这些发动机可以设计用于使用几种不同类型的燃料的一种（有时两个;也称为“双重燃料”），例如：汽油，柴油燃料，天然气或丙烷。 However, the most common generator fuel is diesel fuel. This is due to the fact that diesel fuel is readily available, easily stored and not easily ignited. The internal combustion engines used in generators are very similar to the engines used in your car or truck, with just a couple of modifications. Those modifications allow the generator engine to start-up very quickly and to run at a fixed speed for many hours, or days, without undue wear and tear on the engine. Like most internal combustion engines, generator engines are normally started by using a lead-acid storage battery. Almost all generator engines are designed to use what is known as “block heaters”, which must be connected, and kept operational all the time, especially when the generator is in a stand-by mode (not running). Block heaters are powered by normal line power. If the block heater doesn’t run all the time, there is a good possibility, particularly in colder climates, that the engine lifespan would be shortened considerably, as it must come up to full RPM’s as soon as it is started. Your typical automobile engine wouldn’t last long if, when started cold, it was revved up to a high RPM right away, and this procedure was repeated every few days. To prolong the engine life in a generator, the block heater is used to keep the engine coolant warm, but, even more important, this keeps the engine lubricating oil at a free-flowing temperature, allowing it to circulate properly as soon as the engine is started, thereby facilitating quicker starting of the engine and maximizing engine life.
