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Yongan introduces the connection method of copper-clad steel stranded wire
Copper clad steel wire how to connect
Firstly, according to the design drawings, a copper-clad steel grounding pole should be installed. The distance between the copper-clad steel grounding poles should be strictly in accordance with the requirements. The grounded copper-clad steel poles that are driven into the ground should be generally high, and they must not differ too much, and then they must be The copper clad steel grounding pole is laid with a copper-clad steel strand. After all preparations are completed, the copper clad steel grounding electrode and the copper-clad steel stranded wire are connected. The next step is to make the next preparation for the connection. First of all, prepare the heat-welding welding mold, welding powder, ignition device, cleaning brush, etc., and then start cleaning the copper clad steel wire and the copper clad steel grounding pole. Contaminants. The connection uses high-temperature exothermic fusion welding. The welding powder adopts high-purity exothermic welding powder produced by Botou City Jinxi Mine Equipment Co., Ltd. The high-purity exothermic welding powder has no residue and no corrosive phenomenon occurs. Thicker surface copper layer (average thickness greater than 0.3mm), strong corrosion resistance, long service life (more than 30 years), maintenance-free.
Redetection
In order to prevent the overvoltage generated by the lightning strike of the copper clad steel strand, the power supply continues to push a large current into the short circuit point to form high heat.
Caught fire. This type of accident can usually be avoided by a thermal fusion point in series with the varistor. The thermal fusion point should have a good thermal coupling with the resistor body. When the maximum inrush current flows, it will not be disconnected, but it will be disconnected when the temperature exceeds the upper limit operating temperature of the resistor body. The research results show that if varistors have manufacturing defects and are prone to early failures, the multiple effects of small electric shocks will accelerate the aging process and cause premature failure.
Like copper-clad steel strands and selenium cells, avalanche diodes have a limited ability to handle surges. The insulation level of various equipment should be able to meet the voltage insulation requirements of the equipment, and should be strictly controlled during the ordering and delivery testing of the equipment. When the surge is large, the insulation voltage withstand level of the equipment is ensured according to the requirements of the regulations, and the building itself is protected against The lightning performance directly affects the lightning protection of the internal electrical equipment. Therefore, the lightning protection of the building body must first be emphasized. To prevent lightning damage. The lightning protection device of the building itself is the first barrier to the lightning protection of electrical equipment and systems in the building, and only varistors really play a role.