AIR CIRCUIT BREAKER
MT/MVS
ACB (Air Circuit Breaker) is a high-performance low-voltage circuit breaker, with representative models including MT/NT and MVS series, covering rated currents of 630A~6300A, with a formidable breaking capacity of up to 150kA, making it exceptionally suitable for industrial, commercial, and energy distribution systems.
Core features:
Intelligence: Equipped with a state-of-the-art Micrologic release, it supports advanced real-time monitoring (current, voltage, fault recording) and offers seamless remote control, fully compatible with the innovative EcoStruxure platform.
High reliability: Features a robust modular design, offering optional electronic/thermal magnetic protection, with an impressive lifespan rated for tens of thousands of operations.
Comprehensive protection: Ensures reliable overload, short circuit, and ground fault protection, with support for selective coordination.
Flexible Expansion:Can be enhanced with communication modules (Modbus, Ethernet) and auxiliary contacts for diverse applications.
Ideal for data centers, manufacturing facilities, and large-scale buildings, distinguished for its high security, digital management, and efficient energy conservation, all while adhering to IEC/GB standards.
Working principle:
The air circuit breaker consistently monitors the electrical current via a high-precision current transformer, transmitting the data to the intelligent controller.
When the intelligent controller detects any abnormal current, it promptly disconnects the internal contacts of the circuit breaker to safely cut off the circuit, ensuring optimal protection.

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: Explore the revolutionary advancements and superior features that distinguish our Premium Quality ACB Air Circuit Breaker, delivering exceptional performance and unwavering reliability.
Δ High-Temperature Resistant & Flame-Retardant Casing: Specifically engineered to endure extreme conditions effortlessly, ensuring unmatched safety and long-lasting durability across all operational environments.
Δ Copper-Plated Silver Alloy Contacts (Dynamic/Static): Experience exceptional conductivity and dependability with expertly crafted contacts, designed for optimal electrical performance and unwavering reliability.
Δ Silver Alloy Contacts (High Conductivity & Superior Arc Resistance): Enjoy excellent conductivity and remarkable arc resistance, ensuring seamless and efficient electrical connections every time.
Δ Thick Copper-Plated Silver Busbars (Standard In/Out Terminals): Designed to withstand the test of time, our robust busbars guarantee stable and secure current flow, consistently meeting the highest industry standards.
Δ PCB Reliability (48-Hour Aging Test Verified): Rest assured with our meticulously tested PCBs, rigorously validated via comprehensive aging tests to deliver lasting performance and unparalleled reliability.
Installation Instructions
· Our exceptional MTN and MTH models, with a stunning range from 800A to a formidable 6300A (excluding 4000A), are meticulously engineered with uncompromising precision, featuring the same robust and reliable connection terminals;
Effortless installation is our promise! There's no need to dedicate extra space for the front connection, thanks to our expertly designed terminals that maintain a sleek profile and do not increase the circuit breaker's depth;
· Whether you're connecting to a horizontal or vertical busbar, our innovative design ensures seamless and effortless integration. Simply adjust the connection terminal by 90 degrees to achieve optimal alignment and secure fit.
Mechanical Operation Test: Experience the assurance of seamless and uninterrupted performance.
Check the mechanical operation of the circuit breaker to ensure it is flawlessly engineered to be flexible and reliable,bringing peace of mind to your home environment.
Thoroughly test the operational functions, including: closing, opening, and energy storage, ensuring consistent performance with every use..
Electrical Performance Testing: Your safety is our priority, with rigorous testing to ensure unmatched reliability.
Insulation Resistance Test: Harness advanced technology by employing a megohmmeter to meticulously measure the insulation resistance of both main and auxiliary circuits, guaranteeing adherence to industry standards (typically ≥ 1M Ω).
Power Frequency Withstand Voltage Test: Demonstrating exceptional durability by applying the rated power frequency voltage (e.g., 2500V for 1 minute) to both main and auxiliary circuits, assessing their superior insulation capabilities.
Contact Resistance Test: Precisely measure the contact resistance of the primary contact, ensuring it remains well under the specified threshold (generally at the micro-ohm level), reflecting our commitment to excellence.
Protection Function Test: Designed to shield your equipment with a robust suite of protection features.
Evaluate the precision of action values and timing of protection functions, focusing on overload, short circuit, and ground fault,ensuring maximum safety and reliability.
Carefully verify the settings andfunctionality of the intelligent release device, ensuring it operates at peak performance to protect your home with unparalleled precision.
Outer Packaging:
We ensure your products are encased in protection by employing robust wooden boxes that are expertly crafted to deliver outstanding mechanical resilience.
These remarkably durable wooden crates are perfectly designed for transporting sizable circuit breakers, ensuring secure international logistics.
Inner Packaging:
To shield the circuit breaker, we wrap it in superior buffer materials such as foam pads, bubble film or pearl cotton to expertly reduce vibrations and prevent collisions.
For larger circuit breakers, our packaging incorporates an advanced layered design, with crucial accessories like manuals, tools, and spare partsneatly positioned on the top layer for effortless access.
Domestic Transportation:
If you have a preferred freight forwarder in China, you can be confident that we will smoothly transport your products via road transportation or domestic express service, ensuring prompt delivery as soon as production is completed.
International Transport:
For smaller shipments demanding rapid delivery to specified international destinations, we depend on the esteemed services of the leading three global express companies:
DHL, FEDEX, and UPS.
Sea Freight/Air Freight:
For large-scale shipments where time permits, we utilize sea freight. We seamlessly coordinate with a reliable freight company, arranging truck pickup and transport to the designated port for warehousing.Finally, the cargo will be safely shipped by sea to the customer's specified port, available for pickup with a bill of lading.
Mingtuo Electric Zhejiang Mingtuo Electric Technology Co., Ltd. has firmly cemented its reputation as a leading force within the domestic market and is ambitiously expanding its horizons into international territory. Our esteemed products, highly valued in construction, industry, and energy sectors, have become the top choice for numerous prestigious engineering projects, earning unwavering trust and admiration from our distinguished clientele.
The company adheres to the principle of customer first, quality first, service first, reputation first, and we are unwavering in our pursuit of innovation and development. Our company has built a solid foundation with strong technical prowess, state-of-the-art production techniques, and a wealth of experience in research and development. We distinguish ourselves through our professionalism and technological leadership, equipped with an impressive array of the most advanced production, testing, and inspection equipment available in China.
FAQ
Q: What is the product voltage/current range? What's the breaking ability?
A: For comprehensive details on voltage, current range, and breaking capacity, kindly reach out to our customer service team, who are eager to assist you.
Q: What is the MOQ? Do you support sample ordering?
A: We offer a highly flexible minimum order quantity starting at just 1 set, and we are delighted to provide support for sample orders to perfectly accommodate your needs.
Q: How long is the warranty period? How to apply for warranty?
A: We provide a warranty period ranging from one to two years. To initiate a warranty claim, please contact our dedicated customer service team, who are ready to assist you.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Yes, we proudly hold CE and RoHS certifications, and we are more than pleased to provide these certifications upon your request.
Q: Does the price include tax/shipping?
A: Kindly note that our pricing does not include shipping and tax fees.
Q: What famous clients or project cases have you worked with?
A: We have proudly collaborated with renowned clients including the State Grid of China, Chint Group, and Xiaomi Group, demonstrating our unwavering commitment to excellence and reliability.