Copper bonded/clad steel grounding wire coil(IEC62561,UL Listed)
Through a large number of copper bonded steel applications in projects, such as power plants, substations, petrochemicals,etc., we found that the copper bonded steel rods cannot meet the large grounding area and the long distance grounding requirement. The length of general copper bonded steel rod is less than 6 meters, when laying a large area horizontally, it needs to be connected every 6 meters, the huge number of welding joints will cost a lot of man-hour, which will increase the project time cost and material cost. According to the weakness, Sunlight Company have developed copper bonded steel round wire and copper bonded steel tape with a length of 100 meters in coil, which contains all the physical properties of the copper bonded steel ground rod and the length advantage of the copper bonded steel strand, to meet the needs of different places in the project.
Technical parameter of Sunlight copper bonded steel
1.Tensile strength :Rm 600Mpa Yield/tensile ratio:0.85-0.90
2.Copper thickness: H 0.254mm
3.Plasticity of copper layer: When the product is bent at 90° there's no crack in the inner and outer edge copper layer.
4.Copper layer bondability: When the product is placed between the clamp or the vise jaws, the spacing is smaller than the diameter of the sample steel core(W=d-0.1),hammer the end of the sample, cut off enough copper layer, fully expose the steel core, the exfoliated copper layer is allowed at the jaws of vise, however the remaining part of rod, exfoliated copper and steel is not allowed to be visible to the naked eye.
5.Electrical-corrosion performance:Simulated fault current releasing, after the electrical-corrosion cycle test, the final resistance value growth rate does not exceed 50% of the initial resistance value, Morever, the resistance growth rate of each test step does not exceed 15% during the testing process, And the surface of the copper bonded steel sample is completed, without cracks, pits,bubbling defects after the test.
Definition of copper bonded steel
1.According to IEEE837,copper bonded ground rod fault current test, comparison between Sunlight and Others:
Sunlight(Test result: dense smooth):The steel core is pre-plated with 3μm nickel layer, the copper layer is more dense with better bonding,the oxide layer is compact after the test.
Others(Test result: copper layer warped): Traditional pre-plating process, copper atomic crystals have directionality, with large crystal pores and weak copper layer bonding.
2.According to IEC62561-2,copper bonded rod bent 90°, comparison between Sunlight and Others:
Sunlight(Test result: good):Adopting high-quality carbon structural steel with high mechanical properties and good ductility. the tensile ratio is 0.8-0.95, the inside and outside copper layer without cracking when bending at 90°.
Others(Test result: easy to break ): Using ordinary steel , which has high carbon content and poor ductility, easy to break.
Advantages of copper bonded/clad steel earthing wire coil
1,Reduce the risk of later maintenance and maintain the reliability of the grounding grid.
2,Copper bonded steel coil with a single 100-meter roll( also provide 40-meter, 60-meter, 80-meter roll,etc.,100% suit for market requirements) can be widely used in power plants,substations, petrochemical projects, etc,
3,Meet the requirements of grounding resistance and potential difference in the grounding system when used in large-scale grounding grid.
4,Reduce direct material cost of the connection joint by 90% and labor cost (eg: The grounding material is laid in a grounding groove with a length of 100 meters, if a single 100-meter copper bonded coil is used, only one connection joint is required, while using a copper bonded steel earth rod with a length of 6 meters, 16 joints(not including both ends) should be required)
