AIR CIRCUIT BREAKER
MT/MVS
ACB (Air Circuit Breaker) is a high-performance low-voltage circuit breaker, with distinguished models like MT/NT and MVS series, masterfully handling rated currents of 630A~6300A, showcasing a robust breaking capacity of up to 150kA, positioning it as an ideal choice for industrial, commercial, and energy distribution systems.
Core features:
Intelligence: Incorporating a cutting-edge Micrologic release, it enables advanced real-time surveillance (current, voltage, fault recording) while offering sophisticated remote control, seamlessly integrating with the pioneering EcoStruxure platform.
High reliability: Designed with a durable modular architecture, it offers optional electronic/thermal magnetic protection, boasting an exceptional lifespan rated for tens of thousands of operations.
Comprehensive protection: Delivers dependable overload, short circuit, and ground fault protection, with capabilities for selective coordination.
Flexible Expansion:Accommodates enhancements with communication modules (Modbus, Ethernet) and auxiliary contacts for versatile usage.
Perfect for data centers, manufacturing plants, and expansive structures, noted for its superior safety, digital management, and energy-efficient performance, conforming to IEC/GB standards.
Working principle:
The air circuit breaker meticulously monitors electrical currents via a high-precision current transformer, channeling the data to the intelligent controller.
Upon detecting any irregular current, the intelligent controller swiftly disconnects the internal contacts of the circuit breaker to safely interrupt the circuit, guaranteeing 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: Unlock the extraordinary potential of our Premium Quality ACB Air Circuit Breaker, a hallmark of technological advancement. Boasting unmatched performance and unwavering reliability, this state-of-the-art protection device stands as a testament to our commitment to innovation.
Δ High-Temperature Resistant & Flame-Retardant Casing: Masterfully engineered to brave the harshest extremes, this casing ensures an exceptional degree of safety and longevity across all operational settings, no matter the challenge.
Δ Copper-Plated Silver Alloy Contacts (Dynamic/Static): Witness the epitome of conductivity and dependability with our meticulously crafted contacts. These are engineered to deliver superior electrical performance, setting the benchmark in reliability.
Δ Silver Alloy Contacts (High Conductivity & Superior Arc Resistance): Reap the rewards of outstanding conductivity combined with remarkable arc resistance. Our design ensures seamless electrical connections that operate with unparalleled efficiency and stability.
Δ Thick Copper-Plated Silver Busbars (Standard In/Out Terminals): Designed for durability, our formidable busbars provide unmatched stability and secure current flow, consistently meeting and exceeding the most rigorous industry standards.
Δ PCB Reliability (48-Hour Aging Test Verified): Place your trust in our PCBs, which have been subjected to rigorous 48-hour aging tests. This thorough process ensures enduring performance and steadfast reliability, affirming our commitment to quality.
Installation Instructions
· Our premium MTN and MTH models, with capacities ranging from a substantial 800A to a staggering 6300A (excluding 4000A), are meticulously engineered with the same durable and robust connection terminals;
Effortless installation is our priority! You won't need to reserve any extra real estate for the front connection, thanks to our expertly crafted terminals that maintain the circuit breaker's original depth;
· Whether your connection needs are with a horizontal or vertical busbar, our design promises flawless integration. With a simple 90-degree adjustment of the connection terminal, you achieve perfect alignment and enhanced operational efficiency.
Mechanical Operation Test: Guaranteeing Flawless Functionality
Diligently inspect the mechanical operation of the circuit breaker to ensure it consistently provides flexibility and unwavering reliability.
Conduct an exhaustive examination of all operational functions, including: secure closing, precise opening, and efficient energy storage.
Electrical Performance Testing: Our Pledge to Safety
Insulation Resistance Test: Utilize a high-precision megohmmeter to meticulously measure the insulation resistance of both primary and auxiliary circuits, ensuring they adhere strictly to industry benchmarks (typically ≥ 1M Ω).
Power Frequency Withstand Voltage Test: Subject both main and auxiliary circuits to the rated power frequency voltage (e.g., 2500V for 1 minute) to rigorously evaluate their insulation capabilities.
Contact Resistance Test: Precisely assess the contact resistance of the primary contact to ensure it remains well below the defined threshold (generally at the micro-ohm level).
Protection Function Test: Unyielding Protection for Your Equipment
Thoroughly assess the action values and timing of protection functions, with a critical focus on overload, short circuit, and ground fault.
Meticulously verify the calibrations andoperational efficiency of the intelligent release device, ensuring it operates at peak performance at all times.
Outer Packaging:
We commit to safeguarding your valuable products with utmost precision by utilizing robust wooden boxes that are expertly crafted, promising exceptional mechanical strength and durability.
These resilient wooden crates are meticulously designed to facilitate the secure transport of large circuit breakers, especially across international borders.
Inner Packaging:
To provide unparalleled protection for the circuit breaker, we employ premium buffer materials such as foam pads, bubble film or pearl cotton to effectively cushion against any vibrations and impacts during transit.
For larger circuit breakers, our packaging showcases an innovative layered design, incorporating essential accessories like manuals, tools, and spare partsstrategically placed on the upper layer, ensuring effortless access for the customer.
Domestic Transportation:
In the event you have a specified freight forwarder within China, we assure seamless product transit through reliable road transportation or efficient domestic express services, guaranteeing prompt delivery as soon as production concludes.
International Transport:
For smaller consignments necessitating swift delivery to designated international destinations, we entrust the prestigious services of the world's leading express companies:
DHL, FEDEX, and UPS.
Sea Freight/Air Freight:
For larger shipments where timing is more accommodating, we choose sea freight. Our coordination with a reputable freight company, enables seamless truck pickup and transport to the specified port for warehousing.Ultimately, the cargo is securely transported by sea to the customer's preferred port, ready for collection with a bill of lading that ensures transparent and traceable delivery.
Mingtuo Electric Zhejiang Mingtuo Electric Technology Co., Ltd. has firmly established itself as a leading force within the domestic market, while ambitiously extending its influence into the international arena. Our esteemed products, widely cherished across the construction, industrial, and energy sectors, have become the preferred choice for numerous prestigious engineering projects, earning unwavering trust and admiration from our esteemed clients.
The company adheres to the principle of prioritizing customer satisfaction, unparalleled quality, exceptional service, and outstanding reputation, and we remain relentless in our pursuit of innovative development. Our company has built a formidable foundation with exceptional technical expertise, state-of-the-art production technology, and a wealth of experience in research and development. We distinguish ourselves through our professionalism and technological leadership, offering a comprehensive suite 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 abilities, please kindly consult our responsive customer service team.
Q: What is the MOQ? Do you support sample ordering?
A: Our minimum order quantity is incredibly flexible at just 1 set, and we are delighted to offer support for sample ordering to perfectly accommodate your needs.
Q: How long is the warranty period? How to apply for warranty?
A: We provide a robust product warranty spanning from one to two years. To apply for warranty service, please connect with our dedicated customer service team.
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 are more than pleased to provide these certificates upon request.
Q: Does the price include tax/shipping?
A: Please note that our pricing is exclusive of shipping and tax fees.
Q: What famous clients or project cases have you worked with?
A: We have proudly partnered with renowned clients such as the State Grid of China, Chint Group, and Xiaomi Group, underscoring our steadfast commitment to excellence and reliability.