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1、概述目前,电力、内燃机车使用了一部分一般用途的低压电器。这些电器在环境条件、技术要求以及试验方法等方面都与机车电器的要求有所不同,因而在机车实际使用中,存在不少问题。现在机车上使用的中间继电器就属于这一类型。由于它存在接触压力小、受振动的影响较大、线圈温升高等缺点,因而造成触头接触性能差,甚至会造成电路不通。随着机车性能不断提高,电气线路也日趋复杂、增多,相应要求继电器的触头对数多,使用可靠性高。为了满足电力内燃机
1, Overview At present, electric power, diesel locomotives use some of the general purpose low-voltage electrical appliances. These electrical appliances are different from the requirements of locomotive electrical appliances in terms of environmental conditions, technical requirements and test methods, and thus there are many problems in the practical use of locomotives. Now the middle of the locomotive used in this type of relay. Because of its existence of small contact pressure, the greater the impact of vibration, the coil temperature rise and other shortcomings, resulting in poor contact performance contacts, or even cause the circuit barrier. With the continuous improvement of locomotive performance, the electrical circuit is also increasingly complex, increased, the corresponding requirements of the relay contacts a few more, the use of high reliability. In order to meet the electric internal combustion engine