High-Quality Shielding Cylinder for VI and High-Voltage Power Equipment | China Suppliers & Factory
Product description
As the "arc barrier" at the heart of vacuum interrupters, our shield cylinders are engineered with a sophisticated composite structure, combining high-purity oxygen-free copper and special-grade stainless steel. This material combination is no accident: high-purity oxygen-free copper brings exceptional electrical conductivity and heat absorption capabilities, while special stainless steel contributes superior resistance to arc erosion and mechanical durability, ensuring the shield cylinder can withstand the extreme conditions of high-voltage operations.
Precision Manufacturing
We employ precision drawing to shape the metal into a cylindrical form with uniform wall thickness. Subsequent CNC milling refines the inner surface to a mirror-like finish with a roughness of Ra0.4 or lower.
Arc Energy Absorption
The ultra-smooth inner wall efficiently absorbs arc energy, preventing excessive heat buildup and uniformizing the electric field distribution to reduce insulation breakdown risks.
Insulation Preservation
Our high-quality surface minimizes the adhesion of metal vapors generated during arc interruption, preserving long-term insulation performance and extending service life.
Frequently Asked Questions
Q: What materials are used in the composite structure of the shield cylinders?
A: The shield cylinders combine high-purity oxygen-free copper for exceptional electrical conductivity and heat absorption with special-grade stainless steel for arc erosion resistance and mechanical durability.
Q: What is the surface roughness of the inner wall and how is it achieved?
A: The inner surface is refined to a mirror-like finish with a roughness of Ra0.4 or lower using advanced CNC milling following the precision drawing process.
Q: How does the inner wall surface treatment prevent insulation breakdown?
A: The ultra-smooth surface uniformizes the distribution of the electric field within the vacuum interrupter, which reduces the risk of localized field intensification that could lead to insulation breakdown.
Q: What voltage levels can these shield cylinders accommodate?
A: We can customize integrated structures from the cylinder body to the flange to support equipment requirements ranging from 12kV to 550kV.
Q: What is the vacuum tightness and cycle life of the shield cylinders?
A: They maintain a stable vacuum tightness with a leakage rate of ≤1×10⁻⁹Pa・m³/s throughout 100,000 switching cycles.
Q: What is the assembly tolerance for the core components?
A: The assembly tolerance between the shield cylinder, contacts, and insulating pull rods is strictly controlled within ±0.02mm.