35KV overhead insulated conductor

Description :

　　detailed introduction

　　JKLYJ-35KV Overhead Insulated Wire Specification Table (35-300 square meters) Overhead Cable: Also known as Overhead Line; Overhead power lines; Overhead insulated line; Overhead insulated conductor; Overhead insulated cables.

　　There are high and low voltage classifications for overhead cables: 1KV, 10KV, and 35KV

　　Main models of overhead cables: JKLYJ; JKLGYJ

　　JKLYJ aluminum core cross-linked polyethylene insulated overhead cable

　　JKLGYJ aluminum core cross-linked polyethylene insulated steel core reinforced overhead cable overhead fixed laying

　　Nominal cross-section of overhead cable conductor: 25 mm2、35mm2、50mm2、70mm2、95mm2、120mm2、150mm2、185mm2、240mm2、300mm2

　　JKLGYJ steel core overhead cable, nominal conductor cross-sections: 25/4, 35/6, 50/8, 70/10, 95/15, 120/20, 150/20, 185/25, 240/30, 300/40

　　JKLYJ-35KV overhead wire JKLYJ-35KV overhead insulated wire JKLYJ-35KV overhead insulated wire JKLYJ-35KV overhead cable JKLYJ-35KV overhead insulated cable JKLYJ-35KV insulated overhead wire JKLYJ-35KV insulated overhead cable

　　1. Execution standards:

　　Overhead cables with a rated voltage of 1KV and below shall comply with GB12527-1990 and use IEC502 and IEC227 as reference.

　　The rated voltage of 10kV and 35KV overhead cables GB14049-1993 is based on IEC502 (1983) and IEC840 (1989).

　　2. Product Usage:

　　Overhead cables are suitable for transmission and distribution systems of overhead power lines with rated voltages ranging from 1 to 35KV.

　　3. Usage characteristics

　　The rated voltages are 0.6/1KV, 10KV, and 35KV, respectively.

　　The temperature for cable laying should not be lower than -20 ℃.

　　The basic high temperature for cables during short circuits (with a maximum duration of 5 seconds) is 250 ℃ for cross-linked polyethylene insulation.

　　High density polyethylene insulation at 150 ℃. Polyvinyl chloride insulation at 160 ℃

　　The maximum long-term allowable working temperature for overhead cable conductors: PVC insulation shall not exceed 70 ℃. Polyethylene insulation should not exceed 70 ℃; Cross linked polyethylene insulation should not exceed 90 ℃.

　　The allowable bending radius of overhead cables: single core cables should not be less than 15 times the outer diameter of the cable, and multi-core cables should not be less than 10 times the outer diameter of the cable.

　　4. Technical indicators

　　Working temperature of overhead cables

　　The rated voltage of 1KV overhead insulated cable should not exceed 70 ℃ for PVC and polyethylene insulation, and 90 ℃ for cross-linked polyethylene insulation; Overhead insulated cables with rated voltage of 10KV and 35KV, with cross-linked polyethylene insulation not exceeding 90 ℃ and high-density polyethylene insulation not exceeding 75 ℃.

　　The conductor resistance and tensile strength of the cable are shown in the table below.

　　Insulation resistance of cables:

　　The insulation resistance of overhead insulated cables with a rated voltage of 1KV is shown in the table below. Finished cables without insulation shielding for 10KV and 35KV should be immersed in water for no less than 1 hour and subjected to a direct current voltage of 80-500V. The stabilization time should be no less than 1 minute and no more than 5 minutes. The insulation resistance of a 10KV rated voltage cable should not be less than 1500M Ω KM， The insulation resistance of lightweight thin insulation structure cables should not be less than 1000M Ω KM. The insulation resistance of cables with a rated voltage of 35KV should not be less than 4100M Ω KM。

　　AC voltage test of cables

　　Overhead insulated cables with two or more cores and a rated voltage of 1KV should undergo a voltage test of 3500V for 1 minute. The single core cable should not break through after being immersed in room temperature water (additional electrode) for 1 hour. The rated voltage 10kV overhead insulated cable is immersed in water for 1 hour at room temperature and then subjected to voltage. The ordinary insulation structure is 18kV, the lightweight thin insulation structure is 12kV, and the 35kV is 63kV. The experimental time is 1 minute, and the cable should not break down.

　　Partial discharge test

　　10kV cables with insulation shielding should undergo partial discharge tests on coiled cables immersed in water. An AC voltage of 9kV should be applied to the cable, and the discharge capacity of the cable should not exceed 20pc.

　　5. Requirements for the use of overhead cables

　　When laying cables, the ambient temperature should not be lower than -20 ℃. When laying below -20 ℃, the cables must be preheated.

　　When laying overhead cables, the bending radius of overhead insulated cables with a rated voltage of 1kV should not be less than 6 times the outer diameter of the cable, and for 101kV and 35KV overhead insulated cables, it should not be less than 15 times the outer diameter.

　　The installation method of cables, like bare overhead lines, still needs to be fixed on the insulators of the cross arm, but the distance can be appropriately reduced.

　　The cable should be used in conjunction with specially designed overhead insulated cable metal appliances.

　　During the installation and storage process, attention should be paid to the sealing of cable ends to prevent water ingress and reduce their performance.

　　The long-term operating temperature of overhead cables (i.e. the long-term allowable working temperature of cable conductors) should not exceed 90 ℃ for cross-linked polyethylene insulation and 75 ℃ for high-density polyethylene insulation; Polyethylene and polyvinyl chloride insulation should not exceed 70 ℃; Cross linked polyethylene insulation during short circuit shall not exceed 250 ℃; High density polyethylene and polyvinyl chloride insulation should not exceed 150 ℃ and the longest duration should not exceed 5 seconds.

　　Introduction to Dazheng Electric Wire Co., Ltd

　　Our company is located in Dazheng Industrial Park, Renqiu City, Hebei Province, China Located near the North China Pearl Baiyangdian Scenic Area and National Highway 106; The Beijing Kowloon Railway and Jinbao Road run through the city, 156 kilometers north of Beijing and 120 kilometers east of Tianjin, with a superior geographical location and convenient transportation. Zhang Dandan, the sales general manager of the company, looks forward to working with you

　　The company has strong strength, advanced production equipment and exquisite technical processes Complete testing equipment and sophisticated testing methods Modern scientific management methods and rigorous quality assurance systems The company's products are widely used in electricity Wind power Photovoltaic Mines Oil Various fields such as railway construction Has been rated as a province for several consecutive years Key contract credit enterprise in the city Unit quality trusted by consumers, serving as a national industry quality demonstration enterprise for integrity demonstration units: The product has been rated as a township enterprise product in Hebei Province and a trustworthy product for enterprise quality in Hebei Province.

　　The company covers an area of 76000 square meters, with a building area of 38000 square meters, fixed assets of 20 million yuan, and working capital of 40 million yuan. We have over 200 employees, including 50 engineering and technical personnel and 15 senior technical management personnel.

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