天津DACO接触器DOC-40,DOC-48,DOC-50,DOC-65,DOC-75,韩国Sinwoo S-CON变送器。中山立讯电气有限公司,中山朗立电气有限公司

LCT-2A1-W LCT-2A1-X LCT-2A1-Y LCT-2A1-Z
LCT-2A2-W LCT-2A2-X LCT-2A2-Y LCT-2A2-Z
LCT-2A3-W LCT-2A3-X LCT-2A3-Y LCT-2A3-Z
LCT-2A4-W LCT-2A4-X LCT-2A4-Y LCT-2A4-Z
LCT-2A5-W LCT-2A5-X LCT-2A5-Y LCT-2A5-Z
LCT-2A6-W LCT-2A6-X LCT-2A6-Y LCT-2A6-Z
LCT-2A7-W LCT-2A7-X LCT-2A7-Y LCT-2A7-Z
LCT-2A8-W LCT-2A8-X LCT-2A8-Y LCT-2A8-Z
LCT-2AR-W LCT-2AR-X LCT-2AR-Y LCT-2AR-Z
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LCT-2B1-W LCT-2B1-X LCT-2B1-Y LCT-2B1-Z
LCT-2B2-W LCT-2B2-X LCT-2B2-Y LCT-2B2-Z
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LCT-2B7-W LCT-2B7-X LCT-2B7-Y LCT-2B7-Z

启动方式运用串接于电源与被控电机之间的软起动器，控制其内部晶闸管的导通角，使电机输入电压从零以预设函数关系逐渐上升，直至起动结束，赋予电机全电压，即为软起动，在软起动过程中，电机起动转矩逐渐增加，转速也逐渐增加。软起动一般有下面几种起动方式。斜坡升压软起动：这种起动方式简单，不具备电流闭环控制，仅调整晶闸管导通角，使之与时间成一定函数关系增加。其缺点是，由于不限流，在电机起动过程中，有时要产生较大的冲击电流使晶闸管损坏，对电网影响较大，实际很少应用。斜坡恒流软起动：这种起动方式是在电动机起动的初始阶段起动电流逐渐增加，当电流达到预先所设定的值后保持恒定（t1至t2阶段），直至起动完毕。起动过程中。
天津DACO接触器DOC-40,DOC-48,DOC-50,DOC-65,DOC-75,

LCT-2B8-W LCT-2B8-X LCT-2B8-Y LCT-2B8-Z
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LCT-2C2-W LCT-2C2-X LCT-2C2-Y LCT-2C2-Z
LCT-2C3-W LCT-2C3-X LCT-2C3-Y LCT-2C3-Z
LCT-2C4-W LCT-2C4-X LCT-2C4-Y LCT-2C4-Z
LCT-2C5-W LCT-2C5-X LCT-2C5-Y LCT-2C5-Z
LCT-2C6-W LCT-2C6-X LCT-2C6-Y LCT-2C6-Z
LCT-2C7-W LCT-2C7-X LCT-2C7-Y LCT-2C7-Z
LCT-2C8-W LCT-2C8-X LCT-2C8-Y LCT-2C8-Z
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LCT-2E2-W LCT-2E2-X LCT-2E2-Y LCT-2E2-Z
LCT-2E3-W LCT-2E3-X LCT-2E3-Y LCT-2E3-Z
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LCT-2RR-W LCT-2RR-X LCT-2RR-Y LCT-2RR-Z
LCT-2RN-W LCT-2RN-X LCT-2RN-Y LCT-2RN-Z
LCT-4A1-W LCT-4A1-X LCT-4A1-Y LCT-4A1-Z
LCT-4A2-W LCT-4A2-X LCT-4A2-Y LCT-4A2-Z
LCT-4A3-W LCT-4A3-X LCT-4A3-Y LCT-4A3-Z
LCT-4A4-W LCT-4A4-X LCT-4A4-Y LCT-4A4-Z
LCT-4A5-W LCT-4A5-X LCT-4A5-Y LCT-4A5-Z
LCT-4A6-W LCT-4A6-X LCT-4A6-Y LCT-4A6-Z
LCT-4A7-W LCT-4A7-X LCT-4A7-Y LCT-4A7-Z
LCT-4A8-W LCT-4A8-X LCT-4A8-Y LCT-4A8-Z
LCT-4AR-W LCT-4AR-X LCT-4AR-Y LCT-4AR-Z

将万用表调到电阻X10档，红表棒接到P，黑表棒分别依到R、S、T，正常时有几十欧的阻值，且基本平衡。相反将黑表棒接到P端，红表棒依变频器维修图片变频器维修图片(4张)次接到R、S、T，有一个接近于无穷大的阻值。将红表棒接到N端，重复以上步骤，都应得到相同结果。如果有以阻值三相不平衡，说明整流桥有故障.B.红表棒接P端时，电阻无穷大，可以断定整流桥故障或启动电阻出现故障。测试逆变电路将红表棒接到P端，黑表棒分别接U、V、W上，应该有几十欧的阻值，且各相阻值基本相同。将黑表棒N端，反相应该为无穷大，重复以上步骤应得到相同结果，否则可确定逆变模块有故障。动态测试在静态测试结果正常以后，才可进行动态测试。
天津DACO接触器DOC-40,DOC-48,DOC-50,DOC-65,DOC-75,

LCT-4AN-W LCT-4AN-X LCT-4AN-Y LCT-4AN-Z
LCT-4B1-W LCT-4B1-X LCT-4B1-Y LCT-4B1-Z
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LCT-4B4-W LCT-4B4-X LCT-4B4-Y LCT-4B4-Z
LCT-4B5-W LCT-4B5-X LCT-4B5-Y LCT-4B5-Z
LCT-4B6-W LCT-4B6-X LCT-4B6-Y LCT-4B6-Z
LCT-4B7-W LCT-4B7-X LCT-4B7-Y LCT-4B7-Z
LCT-4B8-W LCT-4B8-X LCT-4B8-Y LCT-4B8-Z
LCT-4BR-W LCT-4BR-X LCT-4BR-Y LCT-4BR-Z
LCT-4BN-W LCT-4BN-X LCT-4BN-Y LCT-4BN-Z
LCT-4C1-W LCT-4C1-X LCT-4C1-Y LCT-4C1-Z
LCT-4C2-W LCT-4C2-X LCT-4C2-Y LCT-4C2-Z
LCT-4C3-W LCT-4C3-X LCT-4C3-Y LCT-4C3-Z
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LCT-4R6-W LCT-4R6-X LCT-4R6-Y LCT-4R6-Z
LCT-4R7-W LCT-4R7-X LCT-4R7-Y LCT-4R7-Z
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LCT-7A1-W LCT-7A1-X LCT-7A1-Y LCT-7A1-Z
LCT-7A2-W LCT-7A2-X LCT-7A2-Y LCT-7A2-Z
LCT-7A3-W LCT-7A3-X LCT-7A3-Y LCT-7A3-Z
LCT-7A4-W LCT-7A4-X LCT-7A4-Y LCT-7A4-Z
LCT-7A5-W LCT-7A5-X LCT-7A5-Y LCT-7A5-Z

反向阻断峰值电压VPR当可控硅加反向电压，处于反向关断状态时，可以重复加在可控硅两端的反向峰值电压。使用时，不能超过手册给出的这个参数值。触发电压VGT在规定的环境温度下，阳极---阴极间加有一定电压时，可控硅从关断状态转为导通状态所需要的控制极电流和电压。维持电流IH在规定温度下，控制极断路，维持可控硅导通所必需的阳极正向电流。许多新型可控硅元件相继问世，如适于高频应用的快速可控硅，可以用正或负的触发信号控制两个方向导通的双向可控硅，可以用正触发信号使其导通，用负触发信号使其关断的可控硅等等。分类编辑可控硅有多种分类方法。（一）按关断、导通及控制方式分类：可控硅按其关断、导通及控制方式可分为普通可控硅、双向可控硅、逆导可控硅、门极关断可控硅（GTO）、BTG可控硅、温控可控硅和光控可控硅等多种。
天津DACO接触器DOC-40,DOC-48,DOC-50,DOC-65,DOC-75,

LCT-7A6-W LCT-7A6-X LCT-7A6-Y LCT-7A6-Z
LCT-7A7-W LCT-7A7-X LCT-7A7-Y LCT-7A7-Z
LCT-7A8-W LCT-7A8-X LCT-7A8-Y LCT-7A8-Z
LCT-7AR-W LCT-7AR-X LCT-7AR-Y LCT-7AR-Z
LCT-7AN-W LCT-7AN-X LCT-7AN-Y LCT-7AN-Z
LCT-7B1-W LCT-7B1-X LCT-7B1-Y LCT-7B1-Z
LCT-7B2-W LCT-7B2-X LCT-7B2-Y LCT-7B2-Z
LCT-7B3-W LCT-7B3-X LCT-7B3-Y LCT-7B3-Z
LCT-7B4-W LCT-7B4-X LCT-7B4-Y LCT-7B4-Z
LCT-7B5-W LCT-7B5-X LCT-7B5-Y LCT-7B5-Z
LCT-7B6-W LCT-7B6-X LCT-7B6-Y LCT-7B6-Z
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LCT-7D1-W LCT-7D1-X LCT-7D1-Y LCT-7D1-Z
LCT-7D2-W LCT-7D2-X LCT-7D2-Y LCT-7D2-Z
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LCT-7D8-W LCT-7D8-X LCT-7D8-Y LCT-7D8-Z
LCT-7DR-W LCT-7DR-X LCT-7DR-Y LCT-7DR-Z
LCT-7DN-W LCT-7DN-X LCT-7DN-Y LCT-7DN-Z
LCT-7E1-W LCT-7E1-X LCT-7E1-Y LCT-7E1-Z
LCT-7E2-W LCT-7E2-X LCT-7E2-Y LCT-7E2-Z
LCT-7E3-W LCT-7E3-X LCT-7E3-Y LCT-7E3-Z
LCT-7E4-W LCT-7E4-X LCT-7E4-Y LCT-7E4-Z
LCT-7E5-W LCT-7E5-X LCT-7E5-Y LCT-7E5-Z
LCT-7E6-W LCT-7E6-X LCT-7E6-Y LCT-7E6-Z
LCT-7E7-W LCT-7E7-X LCT-7E7-Y LCT-7E7-Z
LCT-7E8-W LCT-7E8-X LCT-7E8-Y LCT-7E8-Z
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LCT-7EN-W LCT-7EN-X LCT-7EN-Y LCT-7EN-Z
LCT-7R1-W LCT-7R1-X LCT-7R1-Y LCT-7R1-Z
LCT-7R2-W LCT-7R2-X LCT-7R2-Y LCT-7R2-Z
LCT-7R3-W LCT-7R3-X LCT-7R3-Y LCT-7R3-Z
LCT-7R4-W LCT-7R4-X LCT-7R4-Y LCT-7R4-Z
LCT-7R5-W LCT-7R5-X LCT-7R5-Y LCT-7R5-Z
LCT-7R6-W LCT-7R6-X LCT-7R6-Y LCT-7R6-Z

后这些交流波形经过整流滤波后就得到直流输出电压。控制器的主要目的是保持输出电压稳定，其工作过程与线性形式的控制器很类似。也就是说控制器的功能块、电压参考和误差放大器，可以设计成与线性调节器相同。他们的不同之处在于，误差放大器的输出（误差电压）在驱动功率管之前要经过一个电压/脉冲宽度转换单元。开关电源有两种主要的工作方式：正激式变换和升压式变换。尽管它们各部分的布置差别很小，但是工作过程相差很大，在特定的应用场合下各有优点。[1]工作条件编辑开关：电力电子器件工作在开关状态而不是线性状态高频：电力电子器件工作在高频而不是接近工频的低频直流：开关电源输出的是直流而不是交流[1]主要特点编辑体积小、重量轻：由于没有工频变压器。
天津DACO接触器DOC-40,DOC-48,DOC-50,DOC-65,DOC-75,

LCT-7R7-W LCT-7R7-X LCT-7R7-Y LCT-7R7-Z
LCT-7R8-W LCT-7R8-X LCT-7R8-Y LCT-7R8-Z
LCT-7RR-W LCT-7RR-X LCT-7RR-Y LCT-7RR-Z
LCT-7RN-W LCT-7RN-X LCT-7RN-Y LCT-7RN-Z
LCT-9A1-W LCT-9A1-X LCT-9A1-Y LCT-9A1-Z
LCT-9A2-W LCT-9A2-X LCT-9A2-Y LCT-9A2-Z
LCT-9A3-W LCT-9A3-X LCT-9A3-Y LCT-9A3-Z
LCT-9A4-W LCT-9A4-X LCT-9A4-Y LCT-9A4-Z
LCT-9A5-W LCT-9A5-X LCT-9A5-Y LCT-9A5-Z
LCT-9A6-W LCT-9A6-X LCT-9A6-Y LCT-9A6-Z
LCT-9A7-W LCT-9A7-X LCT-9A7-Y LCT-9A7-Z
LCT-9A8-W LCT-9A8-X LCT-9A8-Y LCT-9A8-Z
LCT-9AR-W LCT-9AR-X LCT-9AR-Y LCT-9AR-Z
LCT-9AN-W LCT-9AN-X LCT-9AN-Y LCT-9AN-Z
LCT-9B1-W LCT-9B1-X LCT-9B1-Y LCT-9B1-Z
LCT-9B2-W LCT-9B2-X LCT-9B2-Y LCT-9B2-Z
LCT-9B3-W LCT-9B3-X LCT-9B3-Y LCT-9B3-Z
LCT-9B4-W LCT-9B4-X LCT-9B4-Y LCT-9B4-Z
LCT-9B5-W LCT-9B5-X LCT-9B5-Y LCT-9B5-Z
LCT-9B6-W LCT-9B6-X LCT-9B6-Y LCT-9B6-Z
LCT-9B7-W LCT-9B7-X LCT-9B7-Y LCT-9B7-Z
LCT-9B8-W LCT-9B8-X LCT-9B8-Y LCT-9B8-Z
LCT-9BR-W LCT-9BR-X LCT-9BR-Y LCT-9BR-Z
LCT-9BN-W LCT-9BN-X LCT-9BN-Y LCT-9BN-Z
LCT-9C1-W LCT-9C1-X LCT-9C1-Y LCT-9C1-Z
LCT-9C2-W LCT-9C2-X LCT-9C2-Y LCT-9C2-Z
LCT-9C3-W LCT-9C3-X LCT-9C3-Y LCT-9C3-Z
LCT-9C4-W LCT-9C4-X LCT-9C4-Y LCT-9C4-Z
LCT-9C5-W LCT-9C5-X LCT-9C5-Y LCT-9C5-Z
LCT-9C6-W LCT-9C6-X LCT-9C6-Y LCT-9C6-Z
LCT-9C7-W LCT-9C7-X LCT-9C7-Y LCT-9C7-Z
LCT-9C8-W LCT-9C8-X LCT-9C8-Y LCT-9C8-Z
LCT-9CR-W LCT-9CR-X LCT-9CR-Y LCT-9CR-Z
LCT-9CN-W LCT-9CN-X LCT-9CN-Y LCT-9CN-Z
LCT-9D1-W LCT-9D1-X LCT-9D1-Y LCT-9D1-Z

动触点就移动，使原来断开的成闭合，原来闭合的成断开状态，达到转换的目的。这样的触点组称为转换触点。用“转”字的拼音字头“z”表示。选用编辑1.先了解必要的条件①控制电路的电源电压，能提供的电流；②被控制电路中的电压和电流；③被控电路需要几组、什么形式的触点。选用继电器时，一般控制电路的电源电压可作为选用的依据。控制电路应能给继电器提供足够的工作电流，否则继电器吸合是不稳定的。2.查阅有关资料确定使用条件后，可查找相关资料，找出需要的继电器的型号和规格号。若手头已有继电器，可依据资料核对是否可以利用。后考虑尺寸是否合适。3.注意器具的容积。若是用于一般用电器，除考虑机箱容积外，小型继电器主要考虑电路板安装布局。
天津DACO接触器DOC-40,DOC-48,DOC-50,DOC-65,DOC-75,

LCT-9D2-W LCT-9D2-X LCT-9D2-Y LCT-9D2-Z
LCT-9D3-W LCT-9D3-X LCT-9D3-Y LCT-9D3-Z
LCT-9D4-W LCT-9D4-X LCT-9D4-Y LCT-9D4-Z
LCT-9D5-W LCT-9D5-X LCT-9D5-Y LCT-9D5-Z
LCT-9D6-W LCT-9D6-X LCT-9D6-Y LCT-9D6-Z
LCT-9D7-W LCT-9D7-X LCT-9D7-Y LCT-9D7-Z
LCT-9D8-W LCT-9D8-X LCT-9D8-Y LCT-9D8-Z
LCT-9DR-W LCT-9DR-X LCT-9DR-Y LCT-9DR-Z
LCT-9DN-W LCT-9DN-X LCT-9DN-Y LCT-9DN-Z
LCT-9E1-W LCT-9E1-X LCT-9E1-Y LCT-9E1-Z
LCT-9E2-W LCT-9E2-X LCT-9E2-Y LCT-9E2-Z
LCT-9E3-W LCT-9E3-X LCT-9E3-Y LCT-9E3-Z
LCT-9E4-W LCT-9E4-X LCT-9E4-Y LCT-9E4-Z
LCT-9E5-W LCT-9E5-X LCT-9E5-Y LCT-9E5-Z
LCT-9E6-W LCT-9E6-X LCT-9E6-Y LCT-9E6-Z
LCT-9E7-W LCT-9E7-X LCT-9E7-Y LCT-9E7-Z
LCT-9E8-W LCT-9E8-X LCT-9E8-Y LCT-9E8-Z
LCT-9ER-W LCT-9ER-X LCT-9ER-Y LCT-9ER-Z
LCT-9EN-W LCT-9EN-X LCT-9EN-Y LCT-9EN-Z
LCT-9R1-W LCT-9R1-X LCT-9R1-Y LCT-9R1-Z
LCT-9R2-W LCT-9R2-X LCT-9R2-Y LCT-9R2-Z
LCT-9R3-W LCT-9R3-X LCT-9R3-Y LCT-9R3-Z
LCT-9R4-W LCT-9R4-X LCT-9R4-Y LCT-9R4-Z
LCT-9R5-W LCT-9R5-X LCT-9R5-Y LCT-9R5-Z
LCT-9R6-W LCT-9R6-X LCT-9R6-Y LCT-9R6-Z
LCT-9R7-W LCT-9R7-X LCT-9R7-Y LCT-9R7-Z
LCT-9R8-W LCT-9R8-X LCT-9R8-Y LCT-9R8-Z
LCT-9RR-W LCT-9RR-X LCT-9RR-Y LCT-9RR-Z
LCT-9RN-W LCT-9RN-X LCT-9RN-Y LCT-9RN-Z

频繁启动的场所可取电动机额定电流的2．25～2．5倍。欠电流继电器的整定电流一般取额定电流的0．1～o．2倍。[1]安装和使用编辑(1)安装前应检查继电器的额定电流和整定电流值是否符合实际使用要求，继电器的动作部分是否灵活、可靠，外罩及壳体是否有损坏或缺件等情况。(2)安装后应在触点不通电的情况下，使吸引线圈通电操作几次。看继电器动作是否可靠。(3)定期检查继电器各零部件是否有松动及损坏现象，并保持触点的清洁。[1]欠电流继电器断相保护电路编辑电路如图7-9所示，电路采用三只欠电流继电器作断相保护。工作原理：按下起动按钮SBl，接触器KM线圈得电动作，主触点闭合，电动机起动。欠电流继电器KAl、KAKA3动作。
天津DACO接触器DOC-40,DOC-48,DOC-50,DOC-65,DOC-75,