AIR CIRCUIT BREAKER
MT/MVS
ACB (Air Circuit Breaker) is a high-performance, low-voltage circuit breaker, with flagship models like the MT/NT and MVS series, encompassing rated currents from 630A to 6300A, delivering an impressive breaking capacity up to 150kA. It's perfectly suited for industrial, commercial, and energy distribution systems.
Core features:
Intelligence: Equipped with a cutting-edge Micrologic release system, offering real-time monitoring ofcurrent, voltage, and fault recording, alongside remote control capabilities, seamlessly integrating with the EcoStruxure platform.
High reliability: Boasting a modular design with optional electronic or thermal magnetic protection, this breaker is built to last through tens of thousands of operations.
Comprehensive protection: Offers overload, short circuit, and ground fault protection, ensuring selective coordination for ultimate safety.
Flexible Expansion:Easily expandable with communication modules likeModbus and Ethernetand can accommodate auxiliary contacts.
Ideal for applications in data centers, factories, and large buildings, this breaker is renowned for its high security, advanced digital management, and low energy consumption, complying with IEC/GB standards.
Working principle:
The air circuit breaker continuously monitors the circuit's current through a precise current transformer, transmitting signals to the intelligent controller.
Upon detecting any abnormal current, the intelligent controller will promptly disconnect the internal contacts of the circuit breaker to securely cut off the circuit

Current |
630A-6300A |
Number of pole |
3P 4P |
Breaking Capacity |
N1,N2,H1,H1B,H2,H3,L1 |
Type |
Fixed Drawer |
Model |
MT/NW/MVS |
Product Features:
Δ Expertly engineered with a high-temperature resistant and flame-retardant casing, ensuring unmatched durability and safety across demanding environments.
Δ Discover the superior performance of our copper-plated silver alloy contacts, meticulously designed for both dynamic and static applications, offering unparalleled reliability.
Δ Featuring silver alloy contacts, our product guarantees exceptional electrical conductivity combined with superior arc resistance, making it an industry leader.
Δ Our robust design includes thick copper-plated silver busbars, standardized for in and out terminals, providing steadfast reliability and efficient operation.
Δ Our product boasts unmatched PCB reliability, verified through a rigorous 48-hour aging test, ensuring you receive the highest quality and performance.
Installation Instructions
· MTN and MTH models ranging from 800A to a robust 6300A (excluding 4000A) are designed with same connection terminals;
No additional space is needed for front connections as the depth of the circuit breaker remains unaffected.
· For seamless integration with your electrical system, adjust the connection terminal by simply rotating it 90 degrees for horizontal or vertical busbar compatibility.
Rigorous Mechanical Operation Test:
Meticulously examine the circuit breaker's mechanical operation to ensure it is exceptionally flexible and unfailingly reliable.
Thoroughly test all operational functionalities such as smooth closing, precise opening, and efficient energy storage.
Detailed Electrical Performance Testing:
Conduct the insulation resistance test using a megohmmeter to meticulously measure the insulation resistance across the main and auxiliary circuits, ensuring strict compliance with the standard (usually ≥ 1M Ω).
Execute the power frequency withstand voltage test by applying the rated power frequency voltage (such as 2500V/1min) to both the main circuit and auxiliary circuit, rigorously verifying their insulation performance.
Perform an accurate contact resistance test to measure the contact resistance at the main contact, guaranteeing it remains below the specified threshold (usually at the micro ohm level).
Robust Protection Function Test:
Precisely test the action values and timing of critical protection functions including overload, short circuit, and ground fault.
Thoroughly verify the configuration settings andoperational functionality of the advanced intelligent release device.
Outer packaging:
Ensure ultimate protection with our choice of strong wooden boxes that are meticulously designed to provide exceptional mechanical strength, keeping your products safe.
Our wooden crates are the perfect choice for large circuit breakers or international transportation, offering unmatched durability.
Inner packaging:
To enhance the safety of the circuit breaker, it is wrapped in superior quality buffer materials such as foam pads, bubble films or pearl cotton ensuring maximum protection against vibration and collision.
For more cumbersome circuit breakers, our packaging box features a sophisticated layered design with additional accessories like manuals, tools, and spare partsstrategically placed on the upper layer for easy access.
Domestic transportation
In cases where a specific freight forwarder in China is appointed, we adeptly transport the products to the designated location using efficient road transportation or domestic express delivery, ensuring timely arrival post-production.
International transport
When shipping needs to be expedited for smaller consignments, we rely on the industry's leading international express delivery companies to ensure swift transit to your designated location abroad. Our trusted partners include the renowned trio of
DHL, FEDEX, UPS
Sea freight/air freight
For larger consignments where delivery time allows, sea freight is our preferred method. We partner with a renowned freight companyto arrange trucks that securely pick up and transport your goods to the designated port for warehousing. Eventually, they are carefully transported by sea to the customer's specified port, where the customer will retrieve the goods using a bill of lading.
Mingtuo Electric Mingtuo Electric not only holds a pivotal position in the domestic market but is also making significant strides globally. Our products are integral in diverse fields such as construction, industry, and energy, earning unwavering trust and preference in various prestigious engineering projects around the world.
The company is unwavering in its commitment to the principle ofcustomer first, quality first, service first, reputation firstand consistently pursues a philosophy centered on innovation and growth. The company is imbued with robust technical prowess, cutting-edge production technologies, and seasoned expertise in research and development, establishing itself as a beacon of professionalism and technological superiority. It possesses an unparalleled suite of the most advanced production, testing, and inspection apparatus in China.
FAQ
Q: What is the product voltage/current range? What's the breaking ability?
A: For detailed information, please reach out to our customer service team.
Q: What is the MOQ? Do you support sample ordering?
A: The minimum order quantity is 1 set, and we are pleased to offer support for sample orders.
Q: How long is the warranty period? How to apply for warranty?
A: We offer a product warranty ranging from one to two years. Warranty applications can be directly handled through our customer service.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Yes, we possess CE and RoHS certifications and are happy to provide the necessary certificates upon request.
Q: Does the price include tax/shipping?
A: The quoted price excludes shipping and tax.
Q: What famous clients or project cases have you worked with?
A: We have collaborated with esteemed clients such as State Grid of China, Chint Group, and Xiaomi Group.