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: Engineered with cutting-edge technology, this product is equipped with a state-of-the-art Micrologic release, supporting advanced real-time monitoring capabilities (current, voltage, fault recording) and provides seamless remote control, fully integrated with the forward-thinking EcoStruxure platform.
High reliability: It boasts a sturdy modular construction, offering optional electronic/thermal magnetic protection, with a remarkable lifespan rated for tens of thousands of operations.
Comprehensive protection: Delivers reliable overload, short circuit, and ground fault protection, with support for selective coordination, guaranteeing a secure operation.
Flexible Expansion:Designed for versatility, it can be enhanced with communication modules such asModbus, Ethernet) and auxiliary contacts to suit diverse applications.
This makes it ideal for data centers, manufacturing facilities, and large-scale buildings, where it stands out for its high security, digital management, and efficient energy conservation, in full compliance with IEC/GB standards.
Working principle:
The air circuit breaker continuously monitors the electrical current through a high-precision current transformer, transmitting this vital data to the intelligent controller.
Upon detecting any abnormal current, the intelligent controller swiftly disconnects the internal contacts of the circuit breaker to safely cut off the circuit, ensuring optimal protection and peace of mind.

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: Embrace cutting-edge innovations and superior features with our Premium Quality ACB Air Circuit Breaker. This exceptional product is distinguished by its unparalleled performance and reliability.
Δ High-Temperature Resistant & Flame-Retardant Casing: Expertly engineered to endure extreme conditions, this casing ensures unmatched safety and durability, offering peace of mind in all operational environments.
Δ Copper-Plated Silver Alloy Contacts (Dynamic/Static): Revel in the exceptional conductivity and reliability provided by our meticulously designed contacts. Crafted with precision, they offer optimal electrical performance and peace of mind.
Δ Silver Alloy Contacts (High Conductivity & Superior Arc Resistance): Unlock excellent conductivity and enhanced arc resistance with these contacts, ensuring seamless and efficient electrical connections that stand the test of time.
Δ Thick Copper-Plated Silver Busbars (Standard In/Out Terminals): Engineered for longevity, our robust busbars guarantee stable and secure current flow, consistently meeting and exceeding high industry standards.
Δ PCB Reliability (48-Hour Aging Test Verified): Place your trust in our meticulously tested PCBs, rigorously validated through extensive 48-hour aging tests to ensure enduring performance and unmatched reliability.
Installation Instructions
· Discover the pinnacle of engineering excellence with our MTN and MTH models. These cutting-edge marvels range from an impressive 800A up to a staggering 6300A, excluding 4000A, and are created with meticulous precision, featuring the same robust connection terminals that epitomize strength and durability.;
Effortless installation is our promise! Revel in the convenience of not needing any additional space for the front connection. Thanks to our expertly crafted terminals, the circuit breaker's depth remains unchanged;
· Experience unparalleled ease when connecting to either horizontal or vertical busbars. Our innovative design ensures flawless integration, allowing you to simply adjust the connection terminal by 90 degrees for perfect alignment, optimizing performance and ease of use.
Mechanical Operation Test: Ensuring Smooth Functionality for Unmatched Performance
Meticulously inspect the mechanical operation of the Smart Intelligent Air Circuit Breaker to guarantee it is exceptionally flexible and unfailingly reliable.
Conduct comprehensive tests on all operational functions, meticulously including: seamless closing, precise opening, and efficient energy storage.
Electrical Performance Testing: Our Unwavering Commitment to Safety
Insulation Resistance Test: Utilize a state-of-the-art megohmmeter to precisely measure the insulation resistance of both main and auxiliary circuits, ensuring they meet and exceed industry standards (typically ≥ 1M Ω).
Power Frequency Withstand Voltage Test: Apply the rated power frequency voltage (e.g., 2500V for 1 minute) to both main and auxiliary circuits to rigorously assess their superior insulation prowess.
Contact Resistance Test: Precisely measure the contact resistance of the primary contact to affirm it remains well below the specified threshold (generally at the micro-ohm level).
Protection Function Test: Ensuring the Unyielding Safety of Your Equipment
Thoroughly evaluate the action values and timing of protection functions, with a keen focus on overload, short circuit, and ground fault.
Meticulously verify the settings andoutstanding functionality of the intelligent release device, ensuring it operates at peak performance.
Outer Packaging:
We ensure your products are protected by using robust wooden boxes that are meticulously crafted to provide exceptional mechanical strength.
These durable wooden crates are ideally suited for transporting large circuit breakers, especially for secure international logistics.
Inner Packaging:
To safeguard the circuit breaker, we envelop it with premium buffer materials such as foam pads, bubble film or pearl cotton to effectively mitigate against vibrations and collisions.
For larger circuit breakers, our packaging features a sophisticated layered design, with essential accessories such as manuals, tools, and spare partsconveniently positioned on the upper layer for easy access.
Domestic Transportation:
If you have a designated freight forwarder in China, rest assured that we will seamlessly transport your products via road transportation or domestic express service, ensuring swift delivery upon production completion.
International Transport:
For smaller shipments requiring expedited delivery to designated international locations, we rely on the prestigious services of the top three global express companies:
DHL, FEDEX, and UPS.
Sea Freight/Air Freight:
For bulk shipments where time is more flexible, we opt for sea freight. We expertly coordinate with a reliable freight company, who will arrange for truck pickup and transport to the designated port for warehousing.Finally, the cargo will be securely shipped by sea to the customer's specified port, ready for pickup with a bill of lading.
Mingtuo Electric Zhejiang Mingtuo Electric Technology Co., Ltd. has firmly positioned itself as a dominant force within the domestic market, with grand aspirations to expand its influence globally. Our products are embraced across construction, industrial, and energy sectors, becoming the top choice for numerous high-profile engineering projects. This distinguished preference underscores the trust and esteem we have earned from our valued clients.
The company adheres to the steadfast principles of customer first, quality first, service first, and reputation first, We remain unwavering in our pursuit of continuous innovation and development. Our company has established a strong foundation supported by exceptional technical expertise, state-of-the-art production technologies, and a wealth of experience in research and development. We distinguish ourselves through our professionalism and technological leadership, offering an extensive array of the most sophisticated production, testing, and inspection equipment available in China.
FAQ
Q: What is the product voltage/current range? What's the breaking ability?
A: For detailed specifications regarding voltage, current range, and breaking ability, we invite you to contact our customer service team for personalized assistance.
Q: What is the MOQ? Do you support sample ordering?
A: Our minimum order quantity is highly accommodating at just 1 set. We are delighted to support sample ordering to seamlessly cater to your specific requirements.
Q: How long is the warranty period? How to apply for warranty?
A: We provide a comprehensive product warranty that spans from one to two years. To apply for warranty services, kindly reach out to our dedicated customer service team for prompt assistance.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Absolutely, we proudly possess CE and RoHS certifications, and we are more than willing to provide these certificates upon request.
Q: Does the price include tax/shipping?
A: Please be advised that our pricing does not include shipping and tax fees, allowing for transparency in your transactions.
Q: What famous clients or project cases have you worked with?
A: We have had the privilege to partner with prestigious clients such as the State Grid of China, Chint Group, and Xiaomi Group, reflecting our unwavering commitment to excellence and dependability.