Copper Tungsten Electrical Contact
1. What's Copper Tungsten Electrical Contact?
Copper tungsten electrical contact, also known as tungsten copper contact, is electrical contact component manufactured through powder metallurgy and infiltration processes using tungsten as skeleton and copper as conductive and thermally conductive phase. CTIA's copper tungsten electrical contacts utilize independent material properties of tungsten and copper, combining high melting point and arc-erosion resistance of tungsten with electrical and thermal conductivity of copper. Primarily used in current-carrying, making, and breaking parts of switching appliances, they help enhance breaking reliability, anti-welding capability, and service life of contacts.
2. Characteristics of CTIA's Copper Tungsten Electrical Contact
(1) Arc-Erosion Resistance & Reduced Contact Loss: High melting point and high-temperature resistance of tungsten effectively resist arc erosion, mitigating material loss caused by repeated interruption.
(2) Anti-Welding Resistance & Enhanced Breaking Reliability: Tungsten phase restricts flow of localized molten metal, lowering risk of contact welding under heavy currents.
(3) Transpiration Cooling to Reduce Localized Overheating: Under intense arc exposure, the copper phase melts and vaporizes, absorbing and carrying away part of the heat to reduce the thermal load on the contact surface.
(4) Stable Contact Resistance for Guaranteed Current Conduction: Copper phase provides conductive channels, maintaining stable current transmission capability.
(5) Good Thermal Conductivity for Controlled Temperature Rise: The copper phase rapidly transfers heat away from the contact area, while tungsten's high-temperature stability helps reduce localized overheating.
(6) High Hardness and Good Wear Resistance: The tungsten phase improves hardness and wear resistance, enabling contacts to withstand mechanical stress during repeated contact and switching operations.
3. Types of CTIA's Copper Tungsten Electrical Contact
(1) High-Voltage Circuit Breaker Contacts: Used as specialized arcing contacts in high- and extra-high-voltage circuit breakers.
(2) Gas-Insulated Switchgear Contacts: Used as specialized arcing contacts in Gas-Insulated Switchgear (GIS).
(3) Vacuum Switching Contacts: Used in vacuum circuit breakers, vacuum contactors, and vacuum load switches.
(4) Load Switch Contacts: Used in current-carrying and interrupting sections of medium- and high-voltage load switches.
(5) Transformer On-Load Tap Changer Contacts: Used in switching components during transformer on-load voltage regulation.
(6) Recloser Contacts: Used as specialized current-interrupting components in medium-voltage automatic reclosers.
(7) Circuit Breaker Contacts: Used in specific contact parts of Air Circuit Breakers (ACB) and Molded Case Circuit Breakers (MCCB).
4. Applications of CTIA's Copper Tungsten Electrical Contact
(1) Ultra-High-Voltage & High-Voltage Switchgear: Used in ultra-high-voltage/high-voltage circuit breakers, SF₆ circuit breakers, and gas-insulated switchgear, featuring strong arc-erosion resistance to withstand high-temperature arc impacts during interruption.
(2) Medium-Voltage Power Distribution Equipment: Used in medium-voltage circuit breakers and load switches, adapting to current making/breaking and frequent operating conditions.
(3) Vacuum Switchgear: Used in vacuum circuit breakers, vacuum contactors, and vacuum load switches, offering outstanding anti-welding and arc-erosion resistance.
(4) Transformer Voltage Regulation Equipment: Used in on-load tap-changers, accommodating current switching and arcing effects during on-load voltage regulation.
5. Specifications of CTIA's Copper Tungsten Electrical Contact
(1) Common Materials: CuW30, CuW25, CuW20, CuW15, etc.
(2) Product Shapes: Discs, cylinders, rings, plates, and custom-shaped components.
(3) Structural Designs: Integral, insert-type, and welded designs, etc.
(4) Dimensions and Tolerances: Customizable.
CTIA GROUP has nearly 30 years of experience manufacturing copper tungsten alloys, with extensive expertise in powder metallurgy and precision machining. CTIA provides customized electrical contact solutions for different switching equipment, taking into account voltage ratings, operating currents, interruption conditions, and contact structures, with services covering material selection, structural design, dimensional customization, and precision machining.
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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