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Circuit breaker coils
HAIPART Coils | Precision Power Cores for Circuit Protection
As a leading coil manufacturer in China, HAIPART's miniature circuit breaker (MCB) coils, crafted with 0.1mm-0.5mm fine enameled wire, achieve a tripping response of ≤20ms at 1.2 times the rated voltage and maintain 99.6% consistency in operation from -25℃ to 70℃, providing lightweight overload protection for residential/commercial building power distribution systems. For industrial applications, HAIPART's molded case circuit breaker (MCCB) coils utilize a multi-strand winding anti-vibration structure, capable of withstanding 10 times the instantaneous current surge while maintaining a 12% reduction in power consumption, providing stable power assurance for factory equipment and automated production lines within a current range of 315A-630A. HAIPART coils, with their fully automated winding process and million-cycle mechanical life verification, offer customized electromagnetic parameter matching for new energy systems, specialized equipment, and other scenarios, truly achieving a "millisecond-level response, consistent performance for ten years" precision power core solution for circuit protection.
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Coils FAQ

Q1:What are the reasons for severe coil overheating?

A1:Core loss, excessive winding resistance, and load current exceeding the rated value.

Q2:What are the possible causes of abnormal noises from a coil?

A2:Magnetostriction effect, loose winding, or core concentricity error.

Q3:What are the typical symptoms of coil damage?

A3:Inductance value deviates from nominal value, heat generation increases under light load, electromagnetic interference, and appearance damage.

Q4:Can a burnt-out coil still be used?

A4:Use is strictly prohibited. Burning will damage the insulation layer, easily causing a short circuit; the performance of the magnetic core will degrade irreversibly.

Q5:What are the common causes of excessive coil temperature rise?

A5:Inter-turn short circuit, excessively high ambient temperature, power supply voltage fluctuation (exceeding ±15% of the rated value).

Q6:How to reduce electromagnetic interference from coils?

A6:The magnetic core structure is optimized and a shielded winding process is adopted to avoid close proximity to sensitive circuits.

Q7:What factors affect coil lifespan?

A7:Operating frequency, duty cycle, and ambient temperature. Frequent start-stop cycles or high-temperature environments will significantly shorten the lifespan.

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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