山东中心供氧哪家好

一般山东电缆桥架发生故障是由电缆敷设时而产生的，电缆敷设的方式不同，从而检阅电缆的故障的难度也大幅提高。地埋方式的敷设的电缆检阅难度是最大的，一般要花费3-5天的时间，甚至更长的时间。桥架、隧道的明敷设方式是最容易查找出故障的区域，一般只要采用专用的电缆故障设备，几十分钟就可以查找到。

Shandong cable tray failure is commonly produced by cable laying from time to time, cable laying in a different way, so as to inspect the difficulty of the cable fault is increasing sharply. Ground of laying cable inspection is one of the biggest difficulty, generally takes 3 to 5 days, or even longer. Ming laying way to bridge, tunnel is the easiest way to find out the fault area, generally as long as the cable fault using special equipment, dozens of minutes to find.

Shandong cable tray

(1)二次脉冲法: 工作原理为将不大于 20—160V 的低压脉冲作用于电 缆， 对故障电缆先释放一个足以使线芯绝缘故障点发生闪络的高压脉 冲，同时触发释放第 2 个低压脉冲，在故障点的电弧未熄灭时，故障 点相对于低压脉冲而言是完全短路。

Working principle of the method: (1) the second pulse to no more than 20-160 v low voltage pulse ACTS on the electric cable, the cable fault to release a enough to make the first line core insulation flashover failure point of high voltage pulse, triggering the release of the second low voltage pulse at the same time, in the point of failure of arc not dies, fault point relative to the low voltage pulse is all short circuit.

(2)闪络法:利用故障点瞬问放电产生多次反射波完成故障排查，使 得高电压作用进行故障点的放电。具体有冲击高压闪络测量法(冲闪 法)、直流高压闪络测量法(直闪法)，两种方法相比，直闪法的波形 更为简单、易丁理解，准确度比较高:闪络法适用范围要更广一些， 但其缺点是波形相对比较复杂，辨别难度比较大，准确度不高。

(2) the flashover method: using fault point instantaneous ask complete troubleshooting discharge generates multiple reflection wave, make the function of high voltage discharge point of failure. Specific have impact on high voltage flashover method (impact flash method), dc high voltage flashover method (direct method), compared two kinds of methods, direct method of waveform is more simple, Yi Ding understanding, the accuracy is higher, flashover method applicable to a wider range, but the downside is waveform is relatively complex, identify the difficulty is bigger, the accuracy is not high.

(3)烧穿故障点法:烧穿故障点法的操作方法是先将直流负高压输入 设备，然后对高阻故障点进行处理，使故障点产生电弧放电。在此基础上:实现绝缘介质碳化。由丁碳化连接点为低电阻，直接促使高阻 故障转化为低阻故障。然后再应用低压脉冲法就可以测出故障点。烧穿故障点法主要适用于高阻战障，尤其是油纸绝缘电缆。

(3) burning through the fault point method: burn through the fault point method of operation is to dc negative high voltage input devices, and then to deal with high impedance fault point, creates an arc discharge point of failure. On this basis: dielectric carbonization. Directly prompted by carbide connection point for low resistance, high resistance fault into low resistance fault. Then the low voltage pulse method can detect point of failure. Burn through the fault point method is mainly suitable for high resistance barrier, especially the paper insulated cable.

(4) the standing wave method: according to the principle of micro method of transmission, by monitoring the transmission lines of standing wave resonance phenomenon, to distance the failure of the cable. This law is mainly suitable for measuring low resistance as well as the open circuit is disabled.

(5)高流电压脉冲法:工作原理为利用传输线的特性阻抗发生变化时 产生回波现象，通过在电缆芯线中加上一定量的高流电压，在保证其 不被烧穿的前提下发生放电。本法适用于各种故障，尤其适用于高阻 击穿。但是本法危险性较大，技术含量高，操作人员的安全容易受到 威胁，而且电流波形较难辨别。

(5) the flow of high voltage pulse method: the principle for use of the characteristic impedance of a transmission line changes produce echo phenomenon, by adding a certain amount of flow of high voltage cable core, on the premise of guarantee its not burn through discharge. This law shall be applicable to all kinds of faults, especially suitable for high resistance breakdown. But this risk is bigger, high technical content, vulnerable to a threat to the safety of the operators, and the current waveform are difficult to identify.

(6) 经典电桥法:经典电桥法通过将被测电缆故障与 1F 故障相短接，电 桥两臂分别与故障点和非故障点相连接， 并调节电桥两臂上的可调电 阻器，使电桥实现平衡，在此基础上，利 用比例关系和已知的电缆长度，就能得出故障距离。本法测量结果较 为精准，使用范围广泛，缺点是需要完好的芯线做网路，注意电源电 压不能加得太高

(6) classic bridge method: classic bridge method by using measured cable fault and fault phase 1 f sub, electric bridge two arms respectively connected with the fault point and the point of failure, and adjust the bridge on two arms of adjustable resistance, make the bridge to achieve balance, on this basis, the use ratio relations and known cable length and fault distance can be obtained. This measurement results for accuracy, using a wide range, defect is need good conductor to do network, pay attention to the power supply electric pressure cannot be too high

(7)低压脉冲反射法:主要是在电缆芯线上施加脉冲讯号，适用于低阻击穿、 电缆短路、 开路故障问题的解决， 低压脉冲法的优点是简单、 直观，可以通过反射脉冲的极性来分辨电缆故障的类型，而且不需要 电缆原始详细资料，但其缺点是无法用于测量高阻和闪络故障。

(7) : low voltage pulse reflection method is mainly applied in the cable core pulse signal, suitable for low block wear, cable short circuit, open circuit fault on the solution of the problem, the advantage of low voltage pulse method is simple and intuitive, and can be reflected pulse polarity to distinguish the type of cable fault, and there's no need to cable the original details, but its drawback is that cannot be used for measuring high resistance and flashover failure.

低压电力电缆一般为多芯电缆，敷设后连续使用中出现故障后，一般都呈现两芯及多芯相间或相对地短路故障。有时在检测到某一芯采集到的故障波形不理想时，可考虑将接线转换到其他故障线芯上进行故障波形检测，往往会出现意想不到的效果，采集和检测到的波形，会变得比较典型和规则，于是就能很快确定电缆故障点的具体位置。

General for low-voltage power cable core cable, after laying after failure of continuous use, generally present or more than two core and core alternate with relatively short circuit fault. Sometimes collected in the test to a core fault waveform is not ideal, can consider to transfer connection to other fault waveform detection fault line core, often can appear unexpected effect, collected and detected waveform, will become more typical and rules, and can quickly determine the cable fault point location.

在利用回波法进行电缆故障定位时， 有时通过转移故障相，接线方式，往往会将复杂的故障转变为简单的故障，快速确定故障位置，为现场线路的抢修赢得时间，这对于供电使用部门意义重大。

In the use of echo method for cable fault location, sometimes by transferring the fault phase, connection mode, tend to complex fault into a simple, fast determine fault location, to win time for repairing the field lines, it is of great significance for power supply using department.

对于内衬层采用挤包铠装的中压直埋电力电缆，故障原因大多为外部机械损伤所致，在绝缘线芯发生故障的同时，内衬层可能已经破损。在遇到电缆绝缘故障比较特殊，利用专业电缆故障仪采集波形困难时。可考虑利用声测法，将高压脉冲直接施加在电缆的钢带和铜屏蔽层之间，往往会很快定点。

For lining layer adopts extruded armoured medium voltage directly buried power cable and the cause of the problem for external caused by mechanical damage, mostly in the insulation wire core at the same time, of the failure of lining layer may have been broken off. In case of cable insulation fault is special, the use of professional cable fault tester acquisition waveform is difficult. Acoustic detection method, can consider to use the high voltage pulse directly applied in the steel belt of the cable and copper shield, tend to be fixed soon.

长期的山东电缆桥架

客户现场测量过程中发现，小截面铜芯直埋电力电缆及铝芯电缆发生故障后，可能同时伴随短路及断线故障，现场检测时，根据各故障芯故障性质的不同将短路故障转换为断线故障测量，往往会事事半功倍。

Long-term shandong cable tray customer found in the process of field measurement, small cross section of copper core directly buried power cable and the aluminum core cable after failure, may at the same time with short circuit and single-line breakdown, on-site testing, in the light of the different nature of the fault core converts fault break line fault measurement, often can get twice the result with half the effort.