GB/T 25122的本部分规定了机车车辆用电力变流器的术语和定义、使用条件、一般特性和检验方法。本部分适用于为轨道交通机车车辆的牵引电路和辅助电路(动力车辆、客车及拖车)供电的电力变流器。本部分也可应用于其他牵引车辆(例如无轨电车等)的电力变流器。本部分适用于完整的变流器机组及其配置,包括:--半导体器件组件;--集成冷却系统;--包括电感、电容、变压器、电阻、接触器、开关的集成组件;--半导体驱动单元(semiconductor drive units 简称SDU)及相关传感器;--保护电路。本部分包含了下列类型的供电电源:--交流接触网;--直流接触网;--车载电源(例如发电机、蓄电池以及其他电源)。本部分不适用于为半导体驱动单元(SDU)提供电气控制电源的变流器和为变流器工作相关的其他设备(如传感器)供电的变流器。
定价: 76元 / 折扣价: 65 元 加购物车
This standard specifies the terms and definitions, rules, methods for inspecting and testing of the main technical performance of the newly-built railway freight car after completion and before being put into service.
This standard is applicable to inspecting and testing of newly-built railway freight cars with maximum operating speed less than or equal to 120 km/h and axle load less than or equal to 30 t. For newly-built railway freight cars with a maximum operating speed more than 120 km/h and an axle load more than 30 t, or with special requirements for structure and operation (such as heavy-duty freight cars, liquefied gas tank cars, etc.), this standard can be taken as a reference.
定价: 588元 / 折扣价: 500 元 加购物车
This standard specifies the inspection requirements and test methods for the appearance, structure and main technical performance of rail heavy-duty maintenance machinery.
This standard is applicable to the inspection and test of rail heavy-duty maintenance machines and their major components on completion of construction and before entry into service.For rail heavy-duty maintenance machinery that requires overhaul, it can also be referred to.
定价: 516元 / 折扣价: 439 元 加购物车