沧州市DACO接触器DCP-21HI,DCP31PS,DCP32PS,DCP33PS,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DSC-2A1-W DSC-2A1-X DSC-2A1-Y DSC-2A1-Z
DSC-2A2-W DSC-2A2-X DSC-2A2-Y DSC-2A2-Z
DSC-2A3-W DSC-2A3-X DSC-2A3-Y DSC-2A3-Z
DSC-2A4-W DSC-2A4-X DSC-2A4-Y DSC-2A4-Z
DSC-2A5-W DSC-2A5-X DSC-2A5-Y DSC-2A5-Z
DSC-2A6-W DSC-2A6-X DSC-2A6-Y DSC-2A6-Z
DSC-2A7-W DSC-2A7-X DSC-2A7-Y DSC-2A7-Z
DSC-2A8-W DSC-2A8-X DSC-2A8-Y DSC-2A8-Z
DSC-2AR-W DSC-2AR-X DSC-2AR-Y DSC-2AR-Z
DSC-2AN-W DSC-2AN-X DSC-2AN-Y DSC-2AN-Z
DSC-2B1-W DSC-2B1-X DSC-2B1-Y DSC-2B1-Z
DSC-2B2-W DSC-2B2-X DSC-2B2-Y DSC-2B2-Z
DSC-2B3-W DSC-2B3-X DSC-2B3-Y DSC-2B3-Z
DSC-2B4-W DSC-2B4-X DSC-2B4-Y DSC-2B4-Z
DSC-2B5-W DSC-2B5-X DSC-2B5-Y DSC-2B5-Z
DSC-2B6-W DSC-2B6-X DSC-2B6-Y DSC-2B6-Z
DSC-2B7-W DSC-2B7-X DSC-2B7-Y DSC-2B7-Z
DSC-2B8-W DSC-2B8-X DSC-2B8-Y DSC-2B8-Z
DSC-2BR-W DSC-2BR-X DSC-2BR-Y DSC-2BR-Z
DSC-2BN-W DSC-2BN-X DSC-2BN-Y DSC-2BN-Z
DSC-2C1-W DSC-2C1-X DSC-2C1-Y DSC-2C1-Z
DSC-2C2-W DSC-2C2-X DSC-2C2-Y DSC-2C2-Z
DSC-2C3-W DSC-2C3-X DSC-2C3-Y DSC-2C3-Z
DSC-2C4-W DSC-2C4-X DSC-2C4-Y DSC-2C4-Z
DSC-2C5-W DSC-2C5-X DSC-2C5-Y DSC-2C5-Z
DSC-2C6-W DSC-2C6-X DSC-2C6-Y DSC-2C6-Z
DSC-2C7-W DSC-2C7-X DSC-2C7-Y DSC-2C7-Z
DSC-2C8-W DSC-2C8-X DSC-2C8-Y DSC-2C8-Z
DSC-2CR-W DSC-2CR-X DSC-2CR-Y DSC-2CR-Z
DSC-2CN-W DSC-2CN-X DSC-2CN-Y DSC-2CN-Z
DSC-2D1-W DSC-2D1-X DSC-2D1-Y DSC-2D1-Z
DSC-2D2-W DSC-2D2-X DSC-2D2-Y DSC-2D2-Z
DSC-2D3-W DSC-2D3-X DSC-2D3-Y DSC-2D3-Z
DSC-2D4-W DSC-2D4-X DSC-2D4-Y DSC-2D4-Z
DSC-2D5-W DSC-2D5-X DSC-2D5-Y DSC-2D5-Z
DSC-2D6-W DSC-2D6-X DSC-2D6-Y DSC-2D6-Z
DSC-2D7-W DSC-2D7-X DSC-2D7-Y DSC-2D7-Z
DSC-2D8-W DSC-2D8-X DSC-2D8-Y DSC-2D8-Z
DSC-2DR-W DSC-2DR-X DSC-2DR-Y DSC-2DR-Z
DSC-2DN-W DSC-2DN-X DSC-2DN-Y DSC-2DN-Z
DSC-2E1-W DSC-2E1-X DSC-2E1-Y DSC-2E1-Z
DSC-2E2-W DSC-2E2-X DSC-2E2-Y DSC-2E2-Z
DSC-2E3-W DSC-2E3-X DSC-2E3-Y DSC-2E3-Z
DSC-2E4-W DSC-2E4-X DSC-2E4-Y DSC-2E4-Z
DSC-2E5-W DSC-2E5-X DSC-2E5-Y DSC-2E5-Z
DSC-2E6-W DSC-2E6-X DSC-2E6-Y DSC-2E6-Z
DSC-2E7-W DSC-2E7-X DSC-2E7-Y DSC-2E7-Z
DSC-2E8-W DSC-2E8-X DSC-2E8-Y DSC-2E8-Z
DSC-2ER-W DSC-2ER-X DSC-2ER-Y DSC-2ER-Z
DSC-2EN-W DSC-2EN-X DSC-2EN-Y DSC-2EN-Z
DSC-2F1-W DSC-2F1-X DSC-2F1-Y DSC-2F1-Z
DSC-2F2-W DSC-2F2-X DSC-2F2-Y DSC-2F2-Z
DSC-2F3-W DSC-2F3-X DSC-2F3-Y DSC-2F3-Z
DSC-2F4-W DSC-2F4-X DSC-2F4-Y DSC-2F4-Z
DSC-2F5-W DSC-2F5-X DSC-2F5-Y DSC-2F5-Z
DSC-2F6-W DSC-2F6-X DSC-2F6-Y DSC-2F6-Z
DSC-2F7-W DSC-2F7-X DSC-2F7-Y DSC-2F7-Z
DSC-2F8-W DSC-2F8-X DSC-2F8-Y DSC-2F8-Z
DSC-2FR-W DSC-2FR-X DSC-2FR-Y DSC-2FR-Z
DSC-2FN-W DSC-2FN-X DSC-2FN-Y DSC-2FN-Z
DSC-2G1-W DSC-2G1-X DSC-2G1-Y DSC-2G1-Z
DSC-2G2-W DSC-2G2-X DSC-2G2-Y DSC-2G2-Z
DSC-2G3-W DSC-2G3-X DSC-2G3-Y DSC-2G3-Z
DSC-2G4-W DSC-2G4-X DSC-2G4-Y DSC-2G4-Z
DSC-2G5-W DSC-2G5-X DSC-2G5-Y DSC-2G5-Z

电流与电阻的大小确定了产生热量的速度，丝的构造与其安装的状况确定了热量耗散的速度，若产生热量的速度小于热量耗散的速度时，丝是不会熔断的。若产生热量的速度等于热量耗散的速度时，在相当长的时间内它也不会熔断。若产生热量的速度大于热量耗散的速度时，那么产生的热量就会越来越多。又因为它有一定比热及质量，其热量的增加就表现在温度的升高上，当温度升高到丝的熔点以上时丝就发生了熔断。这就是丝的工作原理。我们从这个原理中应该知道，您在设计制造丝时必须认真地研究您所选材料的物理特性，并确保它们有一致几何尺寸。因为这些因素对丝能否正常工作起了至关重要的作用。同样，您在使用它的时候，一定要正确地安装它。构成编辑基本组成一般丝由三个部分组成：一是熔体部分。
沧州市DACO接触器DCP-21HI,DCP31PS,DCP32PS,DCP33PS,

DSC-2G6-W DSC-2G6-X DSC-2G6-Y DSC-2G6-Z
DSC-2G7-W DSC-2G7-X DSC-2G7-Y DSC-2G7-Z
DSC-2G8-W DSC-2G8-X DSC-2G8-Y DSC-2G8-Z
DSC-2GR-W DSC-2GR-X DSC-2GR-Y DSC-2GR-Z
DSC-2GN-W DSC-2GN-X DSC-2GN-Y DSC-2GN-Z
DSC-2H1-W DSC-2H1-X DSC-2H1-Y DSC-2H1-Z
DSC-2H2-W DSC-2H2-X DSC-2H2-Y DSC-2H2-Z
DSC-2H3-W DSC-2H3-X DSC-2H3-Y DSC-2H3-Z
DSC-2H4-W DSC-2H4-X DSC-2H4-Y DSC-2H4-Z
DSC-2H5-W DSC-2H5-X DSC-2H5-Y DSC-2H5-Z
DSC-2H6-W DSC-2H6-X DSC-2H6-Y DSC-2H6-Z
DSC-2H7-W DSC-2H7-X DSC-2H7-Y DSC-2H7-Z
DSC-2H8-W DSC-2H8-X DSC-2H8-Y DSC-2H8-Z
DSC-2HR-W DSC-2HR-X DSC-2HR-Y DSC-2HR-Z
DSC-2HN-W DSC-2HN-X DSC-2HN-Y DSC-2HN-Z

DSC-4A1-W DSC-4A1-X DSC-4A1-Y DSC-4A1-Z
DSC-4A2-W DSC-4A2-X DSC-4A2-Y DSC-4A2-Z
DSC-4A3-W DSC-4A3-X DSC-4A3-Y DSC-4A3-Z
DSC-4A4-W DSC-4A4-X DSC-4A4-Y DSC-4A4-Z
DSC-4A5-W DSC-4A5-X DSC-4A5-Y DSC-4A5-Z
DSC-4A6-W DSC-4A6-X DSC-4A6-Y DSC-4A6-Z
DSC-4A7-W DSC-4A7-X DSC-4A7-Y DSC-4A7-Z
DSC-4A8-W DSC-4A8-X DSC-4A8-Y DSC-4A8-Z
DSC-4AR-W DSC-4AR-X DSC-4AR-Y DSC-4AR-Z
DSC-4AN-W DSC-4AN-X DSC-4AN-Y DSC-4AN-Z
DSC-4B1-W DSC-4B1-X DSC-4B1-Y DSC-4B1-Z
DSC-4B2-W DSC-4B2-X DSC-4B2-Y DSC-4B2-Z
DSC-4B3-W DSC-4B3-X DSC-4B3-Y DSC-4B3-Z
DSC-4B4-W DSC-4B4-X DSC-4B4-Y DSC-4B4-Z
DSC-4B5-W DSC-4B5-X DSC-4B5-Y DSC-4B5-Z
DSC-4B6-W DSC-4B6-X DSC-4B6-Y DSC-4B6-Z
DSC-4B7-W DSC-4B7-X DSC-4B7-Y DSC-4B7-Z
DSC-4B8-W DSC-4B8-X DSC-4B8-Y DSC-4B8-Z
DSC-4BR-W DSC-4BR-X DSC-4BR-Y DSC-4BR-Z
DSC-4BN-W DSC-4BN-X DSC-4BN-Y DSC-4BN-Z
DSC-4C1-W DSC-4C1-X DSC-4C1-Y DSC-4C1-Z
DSC-4C2-W DSC-4C2-X DSC-4C2-Y DSC-4C2-Z
DSC-4C3-W DSC-4C3-X DSC-4C3-Y DSC-4C3-Z
DSC-4C4-W DSC-4C4-X DSC-4C4-Y DSC-4C4-Z
DSC-4C5-W DSC-4C5-X DSC-4C5-Y DSC-4C5-Z
DSC-4C6-W DSC-4C6-X DSC-4C6-Y DSC-4C6-Z
DSC-4C7-W DSC-4C7-X DSC-4C7-Y DSC-4C7-Z
DSC-4C8-W DSC-4C8-X DSC-4C8-Y DSC-4C8-Z
DSC-4CR-W DSC-4CR-X DSC-4CR-Y DSC-4CR-Z
DSC-4CN-W DSC-4CN-X DSC-4CN-Y DSC-4CN-Z
DSC-4D1-W DSC-4D1-X DSC-4D1-Y DSC-4D1-Z
DSC-4D2-W DSC-4D2-X DSC-4D2-Y DSC-4D2-Z
DSC-4D3-W DSC-4D3-X DSC-4D3-Y DSC-4D3-Z
DSC-4D4-W DSC-4D4-X DSC-4D4-Y DSC-4D4-Z
DSC-4D5-W DSC-4D5-X DSC-4D5-Y DSC-4D5-Z
DSC-4D6-W DSC-4D6-X DSC-4D6-Y DSC-4D6-Z
DSC-4D7-W DSC-4D7-X DSC-4D7-Y DSC-4D7-Z
DSC-4D8-W DSC-4D8-X DSC-4D8-Y DSC-4D8-Z
DSC-4DR-W DSC-4DR-X DSC-4DR-Y DSC-4DR-Z
DSC-4DN-W DSC-4DN-X DSC-4DN-Y DSC-4DN-Z
DSC-4E1-W DSC-4E1-X DSC-4E1-Y DSC-4E1-Z
DSC-4E2-W DSC-4E2-X DSC-4E2-Y DSC-4E2-Z

实际并不放电；对于小功率的变频器很有放电电阻损坏欠电压保护产生欠电压的原因及处理方法：①电源电压太低②电源缺相；③整流桥故障：如果六个整流二极管中有部分因损坏而短路，整流后的电压将下降，对于整流器件和晶闸管的损坏，应注意检查，及时更换。逆变器件的介绍：1.SCR和GTO晶闸管⑴普通晶闸管SCR曾称可控硅，它有三个极：阳极，阴极和门极。SCR的工作特点是，当在门极与阴极间加一个不大的正向电压（G为+，K为—）时，SCR即导通，负载Rl中就有电流流过。导通后，即使取消门极电压，SCR仍保持导通状态。只有当阳极电路的电压为0或负值时，SCR才关断。所以，只需要用一个脉冲信号，就可以控制其导通了，故它常用于可控整流。
沧州市DACO接触器DCP-21HI,DCP31PS,DCP32PS,DCP33PS,

DSC-4E3-W DSC-4E3-X DSC-4E3-Y DSC-4E3-Z
DSC-4E4-W DSC-4E4-X DSC-4E4-Y DSC-4E4-Z
DSC-4E5-W DSC-4E5-X DSC-4E5-Y DSC-4E5-Z
DSC-4E6-W DSC-4E6-X DSC-4E6-Y DSC-4E6-Z
DSC-4E7-W DSC-4E7-X DSC-4E7-Y DSC-4E7-Z
DSC-4E8-W DSC-4E8-X DSC-4E8-Y DSC-4E8-Z
DSC-4ER-W DSC-4ER-X DSC-4ER-Y DSC-4ER-Z
DSC-4EN-W DSC-4EN-X DSC-4EN-Y DSC-4EN-Z
DSC-4F1-W DSC-4F1-X DSC-4F1-Y DSC-4F1-Z
DSC-4F2-W DSC-4F2-X DSC-4F2-Y DSC-4F2-Z
DSC-4F3-W DSC-4F3-X DSC-4F3-Y DSC-4F3-Z
DSC-4F4-W DSC-4F4-X DSC-4F4-Y DSC-4F4-Z
DSC-4F5-W DSC-4F5-X DSC-4F5-Y DSC-4F5-Z
DSC-4F6-W DSC-4F6-X DSC-4F6-Y DSC-4F6-Z
DSC-4F7-W DSC-4F7-X DSC-4F7-Y DSC-4F7-Z
DSC-4F8-W DSC-4F8-X DSC-4F8-Y DSC-4F8-Z
DSC-4FR-W DSC-4FR-X DSC-4FR-Y DSC-4FR-Z
DSC-4FN-W DSC-4FN-X DSC-4FN-Y DSC-4FN-Z
DSC-4G1-W DSC-4G1-X DSC-4G1-Y DSC-4G1-Z
DSC-4G2-W DSC-4G2-X DSC-4G2-Y DSC-4G2-Z
DSC-4G3-W DSC-4G3-X DSC-4G3-Y DSC-4G3-Z
DSC-4G4-W DSC-4G4-X DSC-4G4-Y DSC-4G4-Z
DSC-4G5-W DSC-4G5-X DSC-4G5-Y DSC-4G5-Z
DSC-4G6-W DSC-4G6-X DSC-4G6-Y DSC-4G6-Z
DSC-4G7-W DSC-4G7-X DSC-4G7-Y DSC-4G7-Z
DSC-4G8-W DSC-4G8-X DSC-4G8-Y DSC-4G8-Z
DSC-4GR-W DSC-4GR-X DSC-4GR-Y DSC-4GR-Z
DSC-4GN-W DSC-4GN-X DSC-4GN-Y DSC-4GN-Z
DSC-4H1-W DSC-4H1-X DSC-4H1-Y DSC-4H1-Z
DSC-4H2-W DSC-4H2-X DSC-4H2-Y DSC-4H2-Z
DSC-4H3-W DSC-4H3-X DSC-4H3-Y DSC-4H3-Z
DSC-4H4-W DSC-4H4-X DSC-4H4-Y DSC-4H4-Z
DSC-4H5-W DSC-4H5-X DSC-4H5-Y DSC-4H5-Z
DSC-4H6-W DSC-4H6-X DSC-4H6-Y DSC-4H6-Z
DSC-4H7-W DSC-4H7-X DSC-4H7-Y DSC-4H7-Z
DSC-4H8-W DSC-4H8-X DSC-4H8-Y DSC-4H8-Z
DSC-4HR-W DSC-4HR-X DSC-4HR-Y DSC-4HR-Z
DSC-4HN-W DSC-4HN-X DSC-4HN-Y DSC-4HN-Z

DSC-7A1-W DSC-7A1-X DSC-7A1-Y DSC-7A1-Z
DSC-7A2-W DSC-7A2-X DSC-7A2-Y DSC-7A2-Z
DSC-7A3-W DSC-7A3-X DSC-7A3-Y DSC-7A3-Z
DSC-7A4-W DSC-7A4-X DSC-7A4-Y DSC-7A4-Z
DSC-7A5-W DSC-7A5-X DSC-7A5-Y DSC-7A5-Z
DSC-7A6-W DSC-7A6-X DSC-7A6-Y DSC-7A6-Z
DSC-7A7-W DSC-7A7-X DSC-7A7-Y DSC-7A7-Z
DSC-7A8-W DSC-7A8-X DSC-7A8-Y DSC-7A8-Z
DSC-7AR-W DSC-7AR-X DSC-7AR-Y DSC-7AR-Z
DSC-7AN-W DSC-7AN-X DSC-7AN-Y DSC-7AN-Z
DSC-7B1-W DSC-7B1-X DSC-7B1-Y DSC-7B1-Z
DSC-7B2-W DSC-7B2-X DSC-7B2-Y DSC-7B2-Z
DSC-7B3-W DSC-7B3-X DSC-7B3-Y DSC-7B3-Z
DSC-7B4-W DSC-7B4-X DSC-7B4-Y DSC-7B4-Z
DSC-7B5-W DSC-7B5-X DSC-7B5-Y DSC-7B5-Z
DSC-7B6-W DSC-7B6-X DSC-7B6-Y DSC-7B6-Z
DSC-7B7-W DSC-7B7-X DSC-7B7-Y DSC-7B7-Z
DSC-7B8-W DSC-7B8-X DSC-7B8-Y DSC-7B8-Z
DSC-7BR-W DSC-7BR-X DSC-7BR-Y DSC-7BR-Z
DSC-7BN-W DSC-7BN-X DSC-7BN-Y DSC-7BN-Z
DSC-7C1-W DSC-7C1-X DSC-7C1-Y DSC-7C1-Z
DSC-7C2-W DSC-7C2-X DSC-7C2-Y DSC-7C2-Z
DSC-7C3-W DSC-7C3-X DSC-7C3-Y DSC-7C3-Z
DSC-7C4-W DSC-7C4-X DSC-7C4-Y DSC-7C4-Z
DSC-7C5-W DSC-7C5-X DSC-7C5-Y DSC-7C5-Z
DSC-7C6-W DSC-7C6-X DSC-7C6-Y DSC-7C6-Z
DSC-7C7-W DSC-7C7-X DSC-7C7-Y DSC-7C7-Z
DSC-7C8-W DSC-7C8-X DSC-7C8-Y DSC-7C8-Z
DSC-7CR-W DSC-7CR-X DSC-7CR-Y DSC-7CR-Z
DSC-7CN-W DSC-7CN-X DSC-7CN-Y DSC-7CN-Z
DSC-7D1-W DSC-7D1-X DSC-7D1-Y DSC-7D1-Z
DSC-7D2-W DSC-7D2-X DSC-7D2-Y DSC-7D2-Z
DSC-7D3-W DSC-7D3-X DSC-7D3-Y DSC-7D3-Z
DSC-7D4-W DSC-7D4-X DSC-7D4-Y DSC-7D4-Z
DSC-7D5-W DSC-7D5-X DSC-7D5-Y DSC-7D5-Z
DSC-7D6-W DSC-7D6-X DSC-7D6-Y DSC-7D6-Z
DSC-7D7-W DSC-7D7-X DSC-7D7-Y DSC-7D7-Z
DSC-7D8-W DSC-7D8-X DSC-7D8-Y DSC-7D8-Z
DSC-7DR-W DSC-7DR-X DSC-7DR-Y DSC-7DR-Z
DSC-7DN-W DSC-7DN-X DSC-7DN-Y DSC-7DN-Z
DSC-7E1-W DSC-7E1-X DSC-7E1-Y DSC-7E1-Z
DSC-7E2-W DSC-7E2-X DSC-7E2-Y DSC-7E2-Z
DSC-7E3-W DSC-7E3-X DSC-7E3-Y DSC-7E3-Z
DSC-7E4-W DSC-7E4-X DSC-7E4-Y DSC-7E4-Z
DSC-7E5-W DSC-7E5-X DSC-7E5-Y DSC-7E5-Z
DSC-7E6-W DSC-7E6-X DSC-7E6-Y DSC-7E6-Z
DSC-7E7-W DSC-7E7-X DSC-7E7-Y DSC-7E7-Z
DSC-7E8-W DSC-7E8-X DSC-7E8-Y DSC-7E8-Z
DSC-7ER-W DSC-7ER-X DSC-7ER-Y DSC-7ER-Z
DSC-7EN-W DSC-7EN-X DSC-7EN-Y DSC-7EN-Z
DSC-7F1-W DSC-7F1-X DSC-7F1-Y DSC-7F1-Z
DSC-7F2-W DSC-7F2-X DSC-7F2-Y DSC-7F2-Z
DSC-7F3-W DSC-7F3-X DSC-7F3-Y DSC-7F3-Z
DSC-7F4-W DSC-7F4-X DSC-7F4-Y DSC-7F4-Z
DSC-7F5-W DSC-7F5-X DSC-7F5-Y DSC-7F5-Z
DSC-7F6-W DSC-7F6-X DSC-7F6-Y DSC-7F6-Z
DSC-7F7-W DSC-7F7-X DSC-7F7-Y DSC-7F7-Z
DSC-7F8-W DSC-7F8-X DSC-7F8-Y DSC-7F8-Z
DSC-7FR-W DSC-7FR-X DSC-7FR-Y DSC-7FR-Z
DSC-7FN-W DSC-7FN-X DSC-7FN-Y DSC-7FN-Z
DSC-7G1-W DSC-7G1-X DSC-7G1-Y DSC-7G1-Z
DSC-7G2-W DSC-7G2-X DSC-7G2-Y DSC-7G2-Z
DSC-7G3-W DSC-7G3-X DSC-7G3-Y DSC-7G3-Z
DSC-7G4-W DSC-7G4-X DSC-7G4-Y DSC-7G4-Z
DSC-7G5-W DSC-7G5-X DSC-7G5-Y DSC-7G5-Z
DSC-7G6-W DSC-7G6-X DSC-7G6-Y DSC-7G6-Z
DSC-7G7-W DSC-7G7-X DSC-7G7-Y DSC-7G7-Z
DSC-7G8-W DSC-7G8-X DSC-7G8-Y DSC-7G8-Z
DSC-7GR-W DSC-7GR-X DSC-7GR-Y DSC-7GR-Z
DSC-7GN-W DSC-7GN-X DSC-7GN-Y DSC-7GN-Z
DSC-7H1-W DSC-7H1-X DSC-7H1-Y DSC-7H1-Z
DSC-7H2-W DSC-7H2-X DSC-7H2-Y DSC-7H2-Z
DSC-7H3-W DSC-7H3-X DSC-7H3-Y DSC-7H3-Z
DSC-7H4-W DSC-7H4-X DSC-7H4-Y DSC-7H4-Z

各部分字母，符号表示内容：个字母：J——电压互感器；第二个字母：D——单相；S——三相第三个字母：J——油浸；Z——浇注；第四个字母：数字——电压等级（KV）。例如：JDJ-10表示单相油浸电压互感器，额定电压10KV。额定一次电压，作为互感器性能基准的一次电压值。额定二次电压，作为互感器性能基准的二次电压值。额定变比，额定一次电压与额定二次电压之比。准确级，由互感器系统定的等级，其误差在规定使用条件下应在规定的限值之内负荷，二次回路的阻抗，通常以视在功率（VA）表示。额定负荷，确定互感器准确级可依据的负荷值。接线方式编辑电压互感器的常用接线方式有以下几种[6]：（1）单项式接线，可以用于测量35kV及以下中性点不直接接地系统的线电压或110kV以上中性点直接接地系统的相对地电压。
沧州市DACO接触器DCP-21HI,DCP31PS,DCP32PS,DCP33PS,

DSC-7H5-W DSC-7H5-X DSC-7H5-Y DSC-7H5-Z
DSC-7H6-W DSC-7H6-X DSC-7H6-Y DSC-7H6-Z
DSC-7H7-W DSC-7H7-X DSC-7H7-Y DSC-7H7-Z
DSC-7H8-W DSC-7H8-X DSC-7H8-Y DSC-7H8-Z
DSC-7HR-W DSC-7HR-X DSC-7HR-Y DSC-7HR-Z
DSC-7HN-W DSC-7HN-X DSC-7HN-Y DSC-7HN-Z

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

但应略大于电动机的功率。3）当电动机属频繁起动、制动工作或处于重载起动且较频繁工作时，可选取大一级的变频器，以利用变频器长期、地运行。4）经测试，电动机实际功率确实有富余，可以考虑选用功率小于电动机功率的变频器，但要注意瞬时峰值电流是否会造成过电流保护动作。5）当变频器与电动机功率不相同时，则必须相应调整节能程序的设置，以利达到较高的节能效果。变频器箱体结构的选用变频器的箱体结构要与环境条件相适应，即必须考虑温度、湿度、粉尘、酸碱度、腐蚀性气体等因素。常见有下列几种结构类型可供用户选用：1）敞开型IPOO型本身无机箱，适用装在电控箱内或电气室内的屏、盘、架上，尤其是多台变频器集中使用时，选用这种型式较好。
沧州市DACO接触器DCP-21HI,DCP31PS,DCP32PS,DCP33PS,

DSC-9D2-W DSC-9D2-X DSC-9D2-Y DSC-9D2-Z
DSC-9D3-W DSC-9D3-X DSC-9D3-Y DSC-9D3-Z
DSC-9D4-W DSC-9D4-X DSC-9D4-Y DSC-9D4-Z
DSC-9D5-W DSC-9D5-X DSC-9D5-Y DSC-9D5-Z
DSC-9D6-W DSC-9D6-X DSC-9D6-Y DSC-9D6-Z
DSC-9D7-W DSC-9D7-X DSC-9D7-Y DSC-9D7-Z
DSC-9D8-W DSC-9D8-X DSC-9D8-Y DSC-9D8-Z
DSC-9DR-W DSC-9DR-X DSC-9DR-Y DSC-9DR-Z
DSC-9DN-W DSC-9DN-X DSC-9DN-Y DSC-9DN-Z
DSC-9E1-W DSC-9E1-X DSC-9E1-Y DSC-9E1-Z
DSC-9E2-W DSC-9E2-X DSC-9E2-Y DSC-9E2-Z
DSC-9E3-W DSC-9E3-X DSC-9E3-Y DSC-9E3-Z
DSC-9E4-W DSC-9E4-X DSC-9E4-Y DSC-9E4-Z
DSC-9E5-W DSC-9E5-X DSC-9E5-Y DSC-9E5-Z
DSC-9E6-W DSC-9E6-X DSC-9E6-Y DSC-9E6-Z
DSC-9E7-W DSC-9E7-X DSC-9E7-Y DSC-9E7-Z
DSC-9E8-W DSC-9E8-X DSC-9E8-Y DSC-9E8-Z
DSC-9ER-W DSC-9ER-X DSC-9ER-Y DSC-9ER-Z
DSC-9EN-W DSC-9EN-X DSC-9EN-Y DSC-9EN-Z
DSC-9F1-W DSC-9F1-X DSC-9F1-Y DSC-9F1-Z
DSC-9F2-W DSC-9F2-X DSC-9F2-Y DSC-9F2-Z
DSC-9F3-W DSC-9F3-X DSC-9F3-Y DSC-9F3-Z
DSC-9F4-W DSC-9F4-X DSC-9F4-Y DSC-9F4-Z
DSC-9F5-W DSC-9F5-X DSC-9F5-Y DSC-9F5-Z
DSC-9F6-W DSC-9F6-X DSC-9F6-Y DSC-9F6-Z
DSC-9F7-W DSC-9F7-X DSC-9F7-Y DSC-9F7-Z
DSC-9F8-W DSC-9F8-X DSC-9F8-Y DSC-9F8-Z
DSC-9FR-W DSC-9FR-X DSC-9FR-Y DSC-9FR-Z
DSC-9FN-W DSC-9FN-X DSC-9FN-Y DSC-9FN-Z
DSC-9G1-W DSC-9G1-X DSC-9G1-Y DSC-9G1-Z
DSC-9G2-W DSC-9G2-X DSC-9G2-Y DSC-9G2-Z
DSC-9G3-W DSC-9G3-X DSC-9G3-Y DSC-9G3-Z
DSC-9G4-W DSC-9G4-X DSC-9G4-Y DSC-9G4-Z
DSC-9G5-W DSC-9G5-X DSC-9G5-Y DSC-9G5-Z
DSC-9G6-W DSC-9G6-X DSC-9G6-Y DSC-9G6-Z

可将计数器分为同步计数器和异步计数器两种。如果按照计数过程中数字增减分类，又可将计数器分为加法计数器、减法计数器和可逆计数器，随时钟信号不断增加的为加法计数器，不断减少的为减法计数器，可增可减的叫做可逆计数器。另外还有很多种分类不一一列举，但是常用的是种分类，因为这种分类可以使人一目了然，知道这个计数器到底是什么触发方式，以便于设计者进行电路的设计。此外，也经常按照计数器的计数进制把计数器分为二进制计数器、十进制计数器等等。应用编辑软件简介计数器应用包括通话、短信、数据等类别的记录，数显计数器数显计数器并支持用户自主选择清零日期，以及按照类别添加提醒数值，如用户可以选择每月任一一天，或者天、后一天作为记录循环清零日。
沧州市DACO接触器DCP-21HI,DCP31PS,DCP32PS,DCP33PS,

DSC-9G7-W DSC-9G7-X DSC-9G7-Y DSC-9G7-Z
DSC-9G8-W DSC-9G8-X DSC-9G8-Y DSC-9G8-Z
DSC-9GR-W DSC-9GR-X DSC-9GR-Y DSC-9GR-Z
DSC-9GN-W DSC-9GN-X DSC-9GN-Y DSC-9GN-Z
DSC-9H1-W DSC-9H1-X DSC-9H1-Y DSC-9H1-Z
DSC-9H2-W DSC-9H2-X DSC-9H2-Y DSC-9H2-Z
DSC-9H3-W DSC-9H3-X DSC-9H3-Y DSC-9H3-Z
DSC-9H4-W DSC-9H4-X DSC-9H4-Y DSC-9H4-Z
DSC-9H5-W DSC-9H5-X DSC-9H5-Y DSC-9H5-Z
DSC-9H6-W DSC-9H6-X DSC-9H6-Y DSC-9H6-Z
DSC-9H7-W DSC-9H7-X DSC-9H7-Y DSC-9H7-Z
DSC-9H8-W DSC-9H8-X DSC-9H8-Y DSC-9H8-Z
DSC-9HR-W DSC-9HR-X DSC-9HR-Y DSC-9HR-Z
DSC-9HN-W DSC-9HN-X DSC-9HN-Y DSC-9HN-Z

FDC-2A1-W FDC-2A1-X FDC-2A1-Y FDC-2A1-Z
FDC-2A2-W FDC-2A2-X FDC-2A2-Y FDC-2A2-Z
FDC-2A3-W FDC-2A3-X FDC-2A3-Y FDC-2A3-Z
FDC-2A4-W FDC-2A4-X FDC-2A4-Y FDC-2A4-Z
FDC-2A5-W FDC-2A5-X FDC-2A5-Y FDC-2A5-Z
FDC-2A6-W FDC-2A6-X FDC-2A6-Y FDC-2A6-Z
FDC-2A7-W FDC-2A7-X FDC-2A7-Y FDC-2A7-Z
FDC-2A8-W FDC-2A8-X FDC-2A8-Y FDC-2A8-Z
FDC-2AR-W FDC-2AR-X FDC-2AR-Y FDC-2AR-Z
FDC-2AN-W FDC-2AN-X FDC-2AN-Y FDC-2AN-Z
FDC-2B1-W FDC-2B1-X FDC-2B1-Y FDC-2B1-Z
FDC-2B2-W FDC-2B2-X FDC-2B2-Y FDC-2B2-Z
FDC-2B3-W FDC-2B3-X FDC-2B3-Y FDC-2B3-Z
FDC-2B4-W FDC-2B4-X FDC-2B4-Y FDC-2B4-Z
FDC-2B5-W FDC-2B5-X FDC-2B5-Y FDC-2B5-Z
FDC-2B6-W FDC-2B6-X FDC-2B6-Y FDC-2B6-Z
FDC-2B7-W FDC-2B7-X FDC-2B7-Y FDC-2B7-Z
FDC-2B8-W FDC-2B8-X FDC-2B8-Y FDC-2B8-Z
FDC-2BR-W FDC-2BR-X FDC-2BR-Y FDC-2BR-Z
FDC-2BN-W FDC-2BN-X FDC-2BN-Y FDC-2BN-Z
FDC-2C1-W FDC-2C1-X FDC-2C1-Y FDC-2C1-Z

是可以工作的，多数变频器的母线电压下限为400V，即是当直流母线电压降至400V以下时，变频器才报告直流母线低电压故障。当两相输入时，直流母线电压为380*1.2=452V400V。当变频器不运行时，由于平波电容的作用，直流电压也可达到正常值，新型的变频器都是采用PWM控制技术，调压调频的工作在逆变桥完成，所以在低频段输入缺相仍可以正常工作，但因为输入电压低输出电压低，造成异步电机转矩低，频率上不去。3)变频器显示过流出现这种故障显示时，首先检查加速时间参数是否太短，力矩提升参数是否太大，然后检查负载是否太重。如果无这些现象，可以断开输出侧的电流互感器和直流侧的霍尔电流检测点，复位后运行，看是否出现过流现象。
沧州市DACO接触器DCP-21HI,DCP31PS,DCP32PS,DCP33PS,

FDC-2C2-W FDC-2C2-X FDC-2C2-Y FDC-2C2-Z
FDC-2C3-W FDC-2C3-X FDC-2C3-Y FDC-2C3-Z
FDC-2C4-W FDC-2C4-X FDC-2C4-Y FDC-2C4-Z
FDC-2C5-W FDC-2C5-X FDC-2C5-Y FDC-2C5-Z
FDC-2C6-W FDC-2C6-X FDC-2C6-Y FDC-2C6-Z
FDC-2C7-W FDC-2C7-X FDC-2C7-Y FDC-2C7-Z
FDC-2C8-W FDC-2C8-X FDC-2C8-Y FDC-2C8-Z
FDC-2CR-W FDC-2CR-X FDC-2CR-Y FDC-2CR-Z
FDC-2CN-W FDC-2CN-X FDC-2CN-Y FDC-2CN-Z
FDC-2D1-W FDC-2D1-X FDC-2D1-Y FDC-2D1-Z
FDC-2D2-W FDC-2D2-X FDC-2D2-Y FDC-2D2-Z
FDC-2D3-W FDC-2D3-X FDC-2D3-Y FDC-2D3-Z
FDC-2D4-W FDC-2D4-X FDC-2D4-Y FDC-2D4-Z
FDC-2D5-W FDC-2D5-X FDC-2D5-Y FDC-2D5-Z
FDC-2D6-W FDC-2D6-X FDC-2D6-Y FDC-2D6-Z
FDC-2D7-W FDC-2D7-X FDC-2D7-Y FDC-2D7-Z
FDC-2D8-W FDC-2D8-X FDC-2D8-Y FDC-2D8-Z
FDC-2DR-W FDC-2DR-X FDC-2DR-Y FDC-2DR-Z
FDC-2DN-W FDC-2DN-X FDC-2DN-Y FDC-2DN-Z
FDC-2E1-W FDC-2E1-X FDC-2E1-Y FDC-2E1-Z
FDC-2E2-W FDC-2E2-X FDC-2E2-Y FDC-2E2-Z
FDC-2E3-W FDC-2E3-X FDC-2E3-Y FDC-2E3-Z
FDC-2E4-W FDC-2E4-X FDC-2E4-Y FDC-2E4-Z
FDC-2E5-W FDC-2E5-X FDC-2E5-Y FDC-2E5-Z
FDC-2E6-W FDC-2E6-X FDC-2E6-Y FDC-2E6-Z
FDC-2E7-W FDC-2E7-X FDC-2E7-Y FDC-2E7-Z
FDC-2E8-W FDC-2E8-X FDC-2E8-Y FDC-2E8-Z
FDC-2ER-W FDC-2ER-X FDC-2ER-Y FDC-2ER-Z
FDC-2EN-W FDC-2EN-X FDC-2EN-Y FDC-2EN-Z

这些机械设备的电机的额定功率通常都较大，如消防泵的额定功率通常都在55kW-150kW之间。这些设备在起动过程中，将产生较大的起动电流，造成较大的电压降。因此恰当地选择起动方式具有减少供电容量和保证建筑物供电可靠性等重要意义。正因为如此，软启动器在民用建筑领域的应用中将具有广阔前景。民用建筑中水泵等动力设备的启动方式的比较众所周知，鼠笼式异步电机采用全压起动时起动电流大，起动时间长的。软启动器（图18）软启动器（图18）当电机的功率较大时，起动电流很大（起动电流为额定电流的5—8倍）。很大的起动电流将引起配电系统的电压降，影响接在同一台变压器或同一条供电线路上的其它电气设备的正常工作，甚至使柴油发电机组熄火停机。
沧州市DACO接触器DCP-21HI,DCP31PS,DCP32PS,DCP33PS,