The generation of GB cable fault test is caused by the laying and application of cable, and the accurate positioning of cable fault test is different with the laying method of cable, and the difficulty coefficient of accurate positioning is gradually increasing. Among them, the accurate positioning and search of cable bridge, tunnel construction and ditch open matching method are relatively simple, while the accuracy and search coefficient of direct buried method is relatively difficult. When the common fault characteristics are simple, the special cable fault test accurate positioning machine equipment can be accurately positioned within tens of minutes, and when the common fault is unique, it usually takes 4-5 days or even longer to carry out the accurate positioning of common faults.

In the use of radar echo method to carry out accurate positioning of cable fault test, sometimes according to the migration of common fault phase, wiring method, usually complex common faults will be changed into simple common faults, quickly clear the common fault location, and obtain time for the maintenance of the spot route, which is of great practical significance for the application unit of the power supply system.

Low-voltage wire and cable are generally multi-core cable lines, and after common faults occur in continuous application after laying, they generally show two-core and multi-core two-color or relative short-circuit faults. Sometimes, when the common fault wave pattern collected by a certain core is not idealized, it can be considered to transform the wiring to other common fault cores to carry out common fault wave pattern inspection, which usually has unexpected practical effects, and the wave pattern collected and tested will become more and more typical and standard, so that the specific address of the cable fault test point can be quickly defined.

National standard cable small cross section copper core buried wire and cable (35mm2 and the following) and aluminum core cable common faults, it is likely that at the same time with the short circuit fault and disconnect common faults, on-site inspection, according to the common fault characteristics of the common fault of each common fault core is not the same, the short circuit fault common faults are converted to disconnect common faults accurate measurement, usually less effort.

For the medium voltage directly buried wire and cable with extruded armored cable lining, most of the common faults are caused by external mechanical equipment damage, and the lining layer is likely to have been damaged at the same time when the insulated cable core produces common faults. When the common faults of the cable insulation layer are more unique, it is difficult to collect the wave pattern using a professional cable fault tester. Consideration can be given to the use of acoustic measurement to immediately increase the high voltage pulse in the middle of the strip and copper shielding layer of the cable line, usually quickly specified.

In the field accurate measurement of the whole process can be found, in the use of acoustic measurement method to carry out the common fault designation of cable lines, the high voltage wire and ground wire in the bad phase and metal material shielding or armor cable in the middle, because the grounding resistance of the two shows a low resistance gold property connection, the sound is not large, can not use cameras to monitor the designation, the actual effect is not ideal. Therefore, the spacing between the charge and discharge ball gap is moderately increased, and at the same time, the high voltage and wire connector are changed to the middle of the two phases that produce common faults, usually the charge and discharge sound will increase, and the common fault point is quickly defined.

As everyone knows, sometimes it is not to find common faults or reasons can be successfully repaired, such as the cable water problem previously said, more serious words are likely to cause complete damage to the cable line, so we must do a good job in the maintenance of the cable line, remove the cable must find the cause of the safety accident symptomatic treatment, The use of cable must also select the appropriate cable according to the situation, such as laying the natural environment is very complex, can apply the national standard cable YJV high-density polyethylene insulation wire and cable, according to layer by layer selection, the application of high-quality oxygen-free copper as raw material, at the same time according to the introduction of good production process and machinery and equipment, The produced high-density polyethylene cable has the characteristics of good resistance to natural environment ground stress, high-quality electrical equipment characteristics, solvent corrosion resistance and light weight, in addition, it can also be modified armored cables to improve impact toughness, prevent cable damage as far as possible, and greatly improve the service life of the cable.

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Hotline: 16678668098