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Contact Assembly for MCB Miniature Circuit Breaker
HAIPART: A Superior Solution for Smart Grid Contact Assembly
HAIPART is a leading Chinese manufacturer of Contact Assembly. The performance of its core circuit breaker components directly impacts equipment lifespan and system reliability. HAIPART meets the demands of smart grids for rapid response and extremely high durability through innovative technologies. HAIPART Contact Assembly have achieved breakthroughs in materials science, employing AgNi10 silver-nickel alloy contacts with a conductivity ≥75% IACS and 40% less arc erosion compared to pure silver contacts. Simultaneously, they utilize nano-ceramic surface treatment with an Al₂O₃ content ≥15%, achieving IEC 62271-100 certification and improving contact resistance stability by 3 times. HAIPART Contact Assembly have rated currents up to 125A, a mechanical life of 100,000+ operations, contact resistance ≤15μΩ, and an operating temperature range of -40°C to +85°C. With superior materials science, excellent environmental adaptability, and stringent technical standards, HAIPART provides reliable and durable contact component solutions for smart grids.
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Contact Assembly FAQ

Q1:What is the core function of contact assembly?

A1:It enables the connection and disconnection of circuits and undertakes the task of current transmission.

Q2:What is the relationship between contact assembly and operating mechanism?

A2:The operating mechanism drives the contact action but has no current carrying capacity. The contact action must be synchronized with the operating mechanism to avoid arcing due to asynchrony.

Q3:How to choose contact materials?

A3:Silver-based alloys are suitable for low-current, high-frequency applications; copper-based alloys are suitable for high-current, high-load applications.

Q4:How to match the rated current of the contacts?

A4:The contacts must support the maximum continuous current of the circuit, and contacts with high mechanical life must be selected for the motor circuit.

Q5:What are the requirements for the installation location of the contacts?

A5:The main contacts should be close to the main circuit of the circuit breaker to reduce wiring length; the auxiliary contacts should be installed in a location that is easy to maintain.

Q6:How to verify the reliability of contact action?

A6:Manual operation: Perform 10 consecutive opening and closing cycles to check for mechanism jamming or abnormal noise.

Electric operation: Simulate remote signals to verify the action time.

Q7:What are the common causes of contact welding?

A7:The contact spring pressure is too low, there are metal particles or foreign objects on the surface, or the breaking current is too high.

Q8:What are the prices of your products?

A8:Product prices vary depending on the model, specifications, and quantity. Please consult the sales team or check the official website for details.

Q9:What after-sales services do you provide?

A9:We provide comprehensive after-sales services, including product consultation, technical guidance, installation and commissioning, repair and replacement, and warranty.

Q10:How can I contact your technical support?

A10:Technical support can be contacted through the official website, customer service hotline, or email.

We believe that through our manufacturing strengths and service commitment, we are able to provide our customers with superior products and an unparalleled service experience.​​​​​​​
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