MKVV MKVV22 MKVV32 MKVVRP high-voltage cable to use features of the product is suitable for AC rated voltage 35KV and below for power transmission and distribution line of fixed granary set with the highest long-term operating temperature of cable conductor is 90 degrees short circuit (the longest no more than 5S), cable maximum conductor temperature does not exceed 250 degrees. UHV cable 1KV and below the low voltage cable; 1KV ~~ 10KV medium voltage cable; 10KV to 35KV high voltage cable; 35 to 220KV UHV lines; UHV lines and cable technology continues to evolve the emergence of a power cable, special high-voltage cables generally as a central link in the large-scale transmission systems, is a high technology content of a high-voltage cable, mainly used for long-distance power transmission. The high voltage cable fault cable of the reasons is the bridge between the power supply equipment and electrical equipment, transmission of electrical energy from the role. The causes of the wide range of applications, failure often occurs, the following is a brief analysis of high-voltage cables FAQs are classified according to the cause of the failure is broadly divided into the following categories: manufacturers manufacturing reasons, reasons of construction quality, design unit design reasons, external damage four categories. 1, the manufacturers Manufacturing reason manufacturers manufacturing reasons according to the occurrence site is divided into the cable body causes the reason three categories of the the cable connector reasons, cable grounding system. (1) Cable body manufacturing reasons generally prone to problems in the cable production process insulation eccentric, uneven thickness of the insulation shield, impurities in the insulation, internal and external shielding projections, the degree of crosslinking is uneven, damp cable, the cable metal sheath poor seal, in some cases more serious may Tests on Completion or put into operation shortly after the failure of most cable systems in the form of defects exist, the long-term safety of the cable run serious risks. (2) cable connector manufacturing reasons for high voltage cable connectors previously used around the package type, die casting, molding and other types, require on-site production of heavy workload, and because of the field conditions, the restrictions and the reasons of the production process, the layer of insulating tape Inevitably there will be an air gap and impurities, so easy a problem occurs. The type is now widely used by domestic assembly type and prefabricated. Cable connector into the cable terminal connector and Cable Joints, no matter what form of connector, cable connector failure generally appear in the insulation shield the fracture, because here is the site of the electrical stress concentration, stress cable joint failure due to manufacturing reasons The cone body manufacturing defects, insulation filler, seals oil spills and other reasons. (3) Cable grounding system cable grounding system, including the part of the ground the cable box, cable grounding protection box (with sheath protector), cable cross-connects in box, sheath protector. Generally prone to the problem mainly because of the sealed off poor water lead to multi-point grounding, causing metal sheath induction current is too large. In addition, the the sheath protector parameter selection unreasonable or quality the bad zinc oxide crystal instability can easily lead to damage to the sheath protector. 2, the construction quality of the reasons is because the quality of construction lead to a lot of examples of the high-voltage cable system failure, mainly due to the following aspects: First, the field conditions are relatively poor, cables and connectors are manufactured in the factory environment and process requirements are very high, and the construction site temperature, humidity, and dust are not well controlled. Cable construction process on an insulating surface will inevitably leave a small skid marks, semi-conductive particles and emery sand may also be embedded in the insulating joint construction process since the insulation exposed in air, the insulation will inhale water, which gave the long-term safe operation of the stay hidden. Is not installed in strict accordance with the construction process or process requirements did not take into account the problems that may arise. DC voltage test completion and acceptance of the joint caused by the formation of anti-electric field result in breakdown. Fifth, it is lead to seal handled properly. The middle connector metal copper shell plus PE or PVC insulation coating sealing structure must be used in the construction site to ensure the seal of dense, so that to ensure effective joint sealing waterproof performance. 3, for design reasons due to thermal expansion of cable cable pinching can result in breakdown. The XLPE cable load is high, the conductor temperature rise, thermal expansion of the cable, in the tunnel turn at the top of the cable to the bracket facade, long-term load operation cable peristaltic force, resulting in bracket facade crushed the cable sheath metal sheath, to squeeze into the cable insulation cable breakdown. [Our solemnly declare: 1, the signing of the product quality assurance and undertaking - substandard products factory never. 2, product quality tracking service within two years, and customer service records in the archives of 20 years. 3 is indeed due to product quality problems, I will plant warranty, refunding, replacement, to meet customer requirements. Specifications: customized according to customer requirements Quantity: the MOQ 100 m, 100 m -200 m floating Package Description: a few meters short of disc packaging meter long cable shaft packing Price Description: Phone deliberations, the price According to the decline in copper prices go up at any time to update Contact Sales (general manager) Wang Wenxu phone No. 15731627778 15731627778 office landline 0316-5726723