GB/T 2423.4-2008
ActiveEnvironmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat，cyclic ( 12h+12h cycle)
电工电子产品环境试验 第2部分：试验方法 试验Db 交变湿热（12h＋12h循环）
📋 Scope / 适用范围 ai_extracted
This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, transportation, and storage of automatic power on/off switches for trolley locomotives. This standard applies to automatic power on/off switches (hereinafter referred to as switches) used for power supply control of industrial and mining trolley locomotive overhead lines.
本标准规定了架线电机车用自动停送电开关的产品分类、要求、试验方法、检验规则、标志、包装、 运输和贮存。 本标准适用于工矿架线电机车电网供电控制用自动停送电开关（以下简称开关）。
📝 Foreword / 前言 ai_extracted
This standard was proposed by the China National Coal Association. This standard is under the jurisdiction of the Standardization Technical Committee for Coal Mine Special Equipment of the Coal Industry. This standard was drafted by the Shanghai Branch of China Coal Research Institute, with the participation of Shanxi Pingyao Tongmiao Locomotive Co., Ltd. and Junda Electric Co., Ltd. The main drafters of this standard are: Xia Wengang, Zhang Jian, Xu Chuanbo, Song Rungen, and Zheng Jian. Free download from Guobiao99 website: www.gb99.cn MT/T1148-2011
本标准由中国煤炭工业协会提出。 本标准由煤炭行业煤矿专用设备标准化技术委员会归口。 本标准由煤炭科学研究总院上海分院负责起草,山西平遥同妙机车有限公司、巨大电气有限公司参 加起草。 本标准主要起草人：夏文刚、张建、徐传波、宋润根、郑建。 国标久久网 www.gb99.cn 免费下载 MT/T1148-2011
📚 References & Relations / 引用与关联
🔗 Related Standards / 同类标准
Content extracted by AI. Not officially verified.