[项目二——手动降压启动3.ppt

Y-?降压启动控制线路之 技能训练 读一读　电气控制原理图 列一列　元器件清单 请根据学校实际，列出安装三相笼型异步电动机Y-Δ降压起动控制线路所需的元器件及导线的型号、规格和数量，并检测元器件的质量 做一做 线路安装 固定元器件。 安装主电路。 安装控制电路 做一做 线路安装 测一测　线路检测 主电路接线检查。按电路图或接线图从电源端开始，逐段核对接线有无漏接、错接之处，检查导线接点是否符合要求，压接是否牢固，以免带负载运行时产生闪弧现象。 控制电路接线检查。用万用表电阻挡检查控制电路接线情况 试一试　通电试车 为保证人身安全，在通电试车时，要认真执行安全操作规程的有关规定，经老师检查并现场监护。 接通三相电源L1、L2、L3，合上电源开关QS，用电笔检查熔断器出线端，氖管亮说明电源接通。按下SB，观察接触器情况是否正常，是否符合线路功能要求，观察电器元件动作是否灵活，有无卡阻及噪声过大现象，观察电动机运行是否正常。若有异常，立即停车检查。 * * Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.