低压电器的应用技巧.doc

低压电器的应用 摘 要 随着我国工业、农业、交通运输、国防、文教卫生、金融、商业、旅游服务等各行业的全面发展，对电能的需求越来越广泛， 据统计发电厂生产的电能约有80%以上是通过转换为低压来使用的。电能的大规模使用给低压电器的发展创造了广阔的空间，电网电机及其它用电设备的转换、控制、保护和调节都要依靠低压电器来完成，低压电器在一定条件下可对电路、电器进行多次保护却不用更换，是电路综合保护、控制的理想电器元件。另外低压电器选用的正确性，直接影响到电器、电缆等配套设备选择的合理性及用电的安全性。 本文通过对低压断路器重要参数和指标的介绍来了解中国国家标准对低压断路器的要求；围绕低压断路器的配电型选用过程来说明低压断路器的选用原则。 关键词：低压断路器 额定电流 额定电压 额定短路分断能力 Selection of low-voltage circuit breaker Abstract With the all-round development of Chinas industry, agriculture, transportation, defense, education, health, finance, commerce, tourism and other service industries, the demand for electricity more widely. according to statistics produced by the power plant, about 80% are by converting to a low voltage use. The massive use of energy to the development of low-voltage electrical appliances to create a vast space, power motors and other electrical equipment conversion, control, protection and regulation must rely on low-voltage electrical appliances to complete. under certain conditions, low voltage electrical circuits protect electrical multiple without replaced. It is ideal electrical components for electrical control. Another selection of low-voltage electrical correctness, directly affect the electrical cables and other equipment selection reasonableness and electrical safety. In this paper, low-voltage circuit breakers for the introduction of key parameters and indicators to understand the Chinese national standard low-voltage circuit breakers requirements; around the low-voltage circuit breaker of the distribution-based selection process to demonstrate the principle of selection of low-voltage circuit breakers. Key words: low-voltage circuit breaker rated voltage Rated current Rated short-circuit breaking capacity 目 录 绪论…………………………………………………………………………1 第1章 低压断路器重要参数和指标…………………………………………3 1.1低压断路器的概念及通常分类………………………………………………3 1.2低压断路器的重要参数指标…………………………………………………4 1.2.1额定电流………………………………………………………………… 4 1.2.2额定电压………………………………………………………………… 4 1.2.3短路特性…………………………………………………