Tungsten Copper High-Voltage Circuit Breaker Contact
1. What's Tungsten Copper High-Voltage Circuit Breaker Contact?
Tungsten copper high-voltage circuit breaker contact is arcing contact installed in arc-extinguishing chamber of high-voltage circuit breakers, where it withstands intense electrical arcs during current interruption. CTIA's tungsten copper high-voltage circuit breaker contacts are manufactured through powder metallurgy copper infiltration process, with tungsten forming heat-resistant framework and copper providing pathways for electrical conduction and heat dissipation. The combination balances arc erosion resistance with current conduction and heat transfer. When the main contacts separate during circuit opening, the arc transfers to the arcing contacts, reducing arc erosion of the main contacts and helping ensure reliable current interruption.
2. Characteristics of CTIA's Tungsten Copper High-Voltage Circuit Breaker Contact
(1) Arc Erosion Resistance and Minimized Loss: High melting point of tungsten steadily withstands intense electrical arcs generated during interruption moments, noticeably decreasing surface loss caused by frequent opening and closing operations, extending equipment service life, and lowering maintenance costs.
(2) Superior Welding Resistance and Reliable Interruption: The tungsten phase helps restrict the formation and flow of molten metal, significantly reducing the risk of contact adhesion or sticking during high-current arcing and helping ensure reliable circuit breaker operation.
(3) Sweating Effect for Heat Dissipation and Thermal Shock Relief: At high temperatures, the copper phase melts and vaporizes, absorbing and carrying away heat to help cool the contact surface and relieve sudden thermal loads.
(4) Excellent Electrical and Thermal Conductivity and Stable Temperature Rise: Copper provides efficient electrical and thermal conduction, ensuring smooth current transmission and rapid heat dissipation while reducing resistive losses and localized overheating.
(5) High-Temperature Strength and Wear Resistance: Tungsten provides high hardness and strength at elevated temperatures, helping contacts withstand both mechanical wear from repeated circuit breaker operations and arc impact.
(6) Adjustable Composition for Different Operating Conditions: Tungsten content can be customized to suit specific requirements. Higher tungsten content generally improves arc erosion resistance, allowing material compositions to be selected according to interruption current and operating conditions.
3. Applications of CTIA's Tungsten Copper High-Voltage Circuit Breaker Contact
Applications of CTIA's tungsten copper contacts in high-voltage circuit breakers primarily include:
(1) SF₆ High-Voltage Circuit Breakers: Used for moving and fixed arcing contacts in high- and extra-high-voltage SF₆ circuit breakers, helping reduce contact erosion under intense arc exposure and extend contact service life.
(2) GIS Circuit Breakers: Used for arcing contacts or arc-resistant inserts in Gas-Insulated Switchgear (GIS) circuit breakers, helping reduce contact material loss during high-current interruption and maintain reliable interruption performance.
(3) Generator Circuit Breakers: Used for arcing contacts and other arc-exposed components in gas-insulated or air-insulated generator circuit breakers, helping reduce arc erosion during high-current interruption and extend contact service life.
(4) Vacuum Circuit Breakers: Used in vacuum circuit breakers, helping improve resistance to arc erosion. Copper-chromium alloy is also commonly used for vacuum interrupter contacts.
4. Specifications of CTIA's Tungsten Copper High-Voltage Circuit Breaker Contact
(1) Common Material: CuW70, CuW75, CuW80, CuW85, CuW90, etc.
(2) Product Form: Moving arcing contacts, fixed arcing contacts, arcing contact inserts, and custom-shaped contact assemblies.
(3) Dimension and Tolerance: Customizable.
CTIA GROUP has nearly 30 years of experience in tungsten copper alloy manufacturing, with expertise in powder metallurgy and copper infiltration as well as precision machining. CTIA provides material selection, structural optimization, and finished-component machining based on interruption current, arc-extinguishing medium, and contact design.
For any inquiry, please contact tungsten copper manufacturer: CTIA GROUP
Email: sales@chinatungsten.com
Tel: 0086 592 5129696 / 0086 592 5129595
Website: tungsten-copper.com
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