To build an ADSS optical cable with an expected life of about 15 to 25 years, in addition to using high-quality optical cables, it is very important to carefully and carefully arrange the preparatory work for the project. First of all, we must comprehensively consider the overall planning of the whole netcom communication system and the long-term development plan of the optical fiber communication backbone network. from the construction feasibility demonstration, the study of comprehensive cost and benefit, to the formulation of detailed design scheme and specific construction scheme, the bidding of ADSS optical cable and supporting fittings, and the qualification of the construction team, we must make careful preparations one by one. At present, with the deepening of the transformation of the two networks, the consumption of ADSS optical cables in the power system is gradually increasing. In the past two years, imported optical fibers and aramid fibers have been in short supply. In order to pursue profits, some manufacturers have reduced the grade and quality of main and auxiliary materials such as core, aramid, sheath and ointment, while users lack the necessary detection means to find out in time, thus causing hidden dangers in safe operation in the future. Therefore, in the choice of ADSS cable, the first priority should be given to manufacturers with a large market share. They often guarantee the quality of their products in order to maintain their reputation. In recent years, the quality of domestic ADSS optical cable has improved rapidly, and the after-sales service and tracking management are also relatively perfect. Our province has adopted all domestic ADSS optical cables in the construction of the first phase of optical fiber network. Secondly, the project management should be jointly undertaken by the construction party, the manufacturer and the designer from the reasonable selection of routes, cores (quantity and type), line data collection (including tower data, conductor distribution data, line corridor and construction geographical environment data, etc.), hanging point design, optical cable distribution, hardware selection and quantification, and construction plan deployment stage, with detailed division of labor and clear responsibilities. The following is a brief description of the test method based on the fault point resistance: 1. When the fault point resistance is equal to infinity, it is easy to find the open circuit fault by low-voltage pulse method. Generally speaking, pure open circuit fault is not common. Usually, open circuit fault is relative to ground or interphase high resistance fault, and relative to ground or interphase low resistance fault coexists. 2. When the fault point resistance is equal to zero, it is easy to find the short-circuit fault measured by the low-voltage pulse method, but this kind of fault is rarely encountered in actual work. 3. When the resistance of the fault point is greater than zero and less than 100 kilohms, it is easy to find the low resistance fault by measuring with the low voltage pulse method. 4. Flashover fault can be measured by direct flash method. This kind of fault generally exists inside the joint. The resistance of the fault point is greater than 100 kilohms, but the value changes greatly, and each measurement is uncertain. 5. High resistance fault can be measured by flash method. The resistance of fault point is greater than 100 kilohms and the value is determined. Generally, when the test current is greater than 15 mA, the test waveforms are repetitive and can overlap, and one waveform has one emission, three reflections and the pulse amplitude gradually weakens, the measured distance is the distance from the fault point to the cable test end; Otherwise, it is the distance from the fault point to the opposite end of the cable test.

The company introduces the latest imported equipment from Germany, Italy and Taiwan and adopts the most advanced cold extrusion process. The cold drawn steel products are of high precision, good surface condition and stable quality, which are deeply trusted by customers and widely used. The products are used in mechanical equipment, electrical products, metal furniture, tools, hardware parts, metal crafts, auto parts, etc.

The company introduces the latest imported equipment from Germany, Italy and Taiwan and adopts the most advanced cold extrusion process. The cold drawn steel products are of high precision, good surface condition and stable quality, which are deeply trusted by customers and widely used. The products are used in mechanical equipment, electrical products, metal furniture, tools, hardware parts, metal crafts, auto parts, etc.