江苏春晨电缆有限公司：https://www.foodjx.com/st161256/

JBF电机引接线江苏春晨电缆有限公司专业生产JBF电机引接线，电机绕组引接线，电机绕组引接软线 软电缆适用于*地与电机绕组连接并引出机壳或绕组与电机上的接线柱连接用电缆。其*工作温度zui高为70℃，敷设时zui大弯曲半径大于电缆外径的4倍，

The so-called sound detection method is based on the sound of the breakdown of the cable to find the sound, the method for the high voltage cable core line on the insulation layer flashover discharge is more effective. The equipment used in this method is DC voltage withstand test machine. Circuit wiring as shown in Figure 1, where the SYB for the high voltage test transformer, C for the high voltage capacitor, ZL for the high voltage silicon rectifier stack, R limit flow resistance, Q for the discharge ball gap, L for the cable core line. When the capacitor is charged to a C voltage, discharge ball gap of cable fault in the fault at the core line, cable line and the insulation layer discharge "Zi Zi," the spark discharge acoustic, again in the clutter noise when the sound is the least, by hearing aid or medical stethoscope and other audio amplifier equipment search. Look at the pickup close to the ground to move slowly along the cable, when the "Zi Zi," acoustic maximum, is the point of failure. Use this method must pay attention to safety, in the test equipment and cable ends should be set up to monitor.

2、电桥法。电桥法就是双臂电桥测出电缆芯线的直流电阻值，再准确测量电缆实际长度，按照电缆长度与电阻的正比例关系，计算的故障点。该方法对于电缆芯线间直接短路或短路点接触电阻小于1Ω的故障，判断误差一般不大于3m，对于故障点接触电阻大于1Ω的故障，可采用加高电压烧穿的方法使电阻降至1Ω以下，再按此方法测量。采用电桥法时应保证测量精度，电桥连接线要尽量短，经径要足够大，与电缆芯线连接要采用压接或焊搂，计算过程中小数位要全部保留。

2, bridge method. Bridge method is to measure the DC resistance of the cable core wire, and then accuray measure the actual length of the cable, in accordance with the length of the cable and the positive ratio of resistance, the calculation of the fault point. The method for fault cable between direct short circuit or short circuit point contact resistance is less than 1, the general judgment error is not greater than 3m, the fault point contact resistance is greater than 1, the method of burning through the heightening of voltage resistance is reduced to 1 the following, according to the measurement. When the bridge method is used to ensure the accuracy of the measurement, the bridge connecting line should be as short as possible, the diameter should be large enough, and the cable core wire connection to the use of compression or welding arm, the calculation process of small and medium-sized to all retain.

3、电容电流测定法。电缆在运行中，芯线之间、芯线对地都存在电容，该电容是均匀分布的，电容量与电缆长度呈线性比例关系，电容电流测定法就是根据这一原理进行测定的，对于电缆芯线断线故障的测定非常准确。测量电路如图4所示，使用设备为1～2kVA单相调压器一台，0～30V、0.5级交流电压表一只，0～100mA、0.5级交流毫安表一只。

3, capacitive current measurement method. The cable is in operation, the core line between and core are capacitance on, the capacitor is evenly distributed, and the capacitance of the cable length is linear proportional relationship, is based on the principle of determination of capacitance current measurement, for the determination of cable core wire disconnection fault is very accurate. The measuring circuit as shown in Figure 4, the use of equipment for 1 ~ 2kVA single phase voltage regulator, 0 ~ 30V, 0.5 AC voltage meter, a 0 ~ 100mA, 0.5 AC Ma Table 1.

测量步骤：

Measurement steps: