Copper Stop End
Products Description
Copper stop ends are cap-type hardware components installed at the ends of copper busbars or conductors to achieve the following functions:
Sealing the conductor end, isolating it from air, moisture, and dust;
Preventing oxidation and corrosion of the copper busbar, maintaining long-term good conductivity;
Improving the mechanical strength of the end and avoiding risks caused by edge burrs;
Auxiliary insulation structure, reducing the risk of arcing, breakdown, or accidental contact;
Improving assembly aesthetics and structural standardization, enhancing overall project quality.
This product is suitable for: Electrical complete sets of equipment, energy storage systems, power distribution, industrial automation equipment, new energy vehicle charging and distribution systems, high and low voltage busbar devices, cable connection systems, etc.
Material Advantages: High-purity copper + functional treatments, solidifying the foundation of protection
The base material is 99.99% high-purity copper (electrolytic oxygen-free copper). Compared to ordinary brass or recycled copper, copper has stronger electrochemical compatibility with copper busbars/copper pipe caps, avoiding galvanic corrosion caused by contact with dissimilar metals and ensuring the chemical stability of the terminal connection. Copper itself has excellent ductility and fatigue resistance, adapting to slight deformation during installation, fitting seamlessly to the conductor surface, eliminating protective gaps.
Surface protection offers diverse customised solutions: passivation treatment (forming a dense oxide film), tin plating (thickness ≥1.5μm), and silver plating (thickness ≥0.3μm) are available. Passivation treatment can improve the surface oxidation resistance by more than 3 times, while tin/silver plating further enhances corrosion resistance and conductivity compatibility, adapting to various harsh environments such as humidity, coastal high salt spray, and chemical corrosion. All processing processes comply with RoHS and REACH international environmental standards, with no heavy metal residue.
Technical Features: Precision Engineering Behind a Tiny Body
Ultra-Precision Tolerance Control
We use high-precision CNC lathes to control the tolerances of inner diameter, outer diameter, concentricity, and end face perpendicularity to the micron level. This precision is an absolute prerequisite for achieving perfect sealing and reliable assembly.
Optimised Surface Finish
The surface finish of the stop end's inner wall is crucial. Through a special finishing process, we achieve a mirror finish, minimising the coefficient of friction with the busbar surface, facilitating installation, and eliminating microscopic pits that could trap contaminants or affect the seal.
Stress Relief Structure Design
At the edges or corners of the stop end, we designed precise R-angle chamfers. This is not only for installation safety and to prevent scratches to operators, but more importantly, it effectively disperses localized stress generated during installation, preventing micro-cracks in the copper end caps material due to stress concentration and ensuring long-term structural strength.
Integrated Molding Concept
For stop ends requiring additional functions, such as models with grounding lugs, we use a single piece of end cap copper material to form a single CNC machine, rather than welding. This eliminates weld seams as potential weak points, ensuring structural integrity and minimal resistance in the current path.
Application Advantages: Playing a Key Role at Critical Nodes
Gas Insulated Switchgear (GIS)
As the terminal end caps of busbar ducts, their sealing performance directly affects the pressure and purity of SF6 insulating gas, and is a core guarantee for the safe operation of the equipment.
01
Bus Truss Trunking
At the connection and branch ends of bus trunking, our copper pipe end caps perfectly protect the copper busbar cuts, preventing finger contact and improving phase-to-phase insulation levels.
02
High Voltage Cable Termination
Copper pipe end stop provides reliable terminal protection for outdoor or underground cables, effectively preventing moisture penetration along the cable core, and is crucial for ensuring the long-term reliable operation of cable networks.
03
Transformers and Reactors
Used to seal winding outlets or cooling pipe ports to prevent coolant leakage and the intrusion of external contaminants.
04
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