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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.
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.
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)
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