AIR CIRCUIT BREAKER: Experience the next level of electrical safety and precision with our Air Circuit Breaker.
Model: MT/MVS - Precision-engineered to elevate performance and ensure reliability.
ACB: The epitome of safety and efficiency in circuit protection. (Air Circuit Breaker) is a state-of-the-art high-performance low-voltage solution, circuit breaker, with renowned models such as MT/NT and MVS series, adeptly covering rated currents from 630A to an impressive 6300A,boasting a formidable breaking capacity reaching 150kA,tailored for industrial and commercial applications, as well as energy distribution systems with utmost efficiency.
Core features that set it apart:
Intelligence Redefined: Equipped with cutting-edge Micrologic release, enabling advanced real-time monitoring (including current, voltage, and fault recording)plus remote control, fully integrated with the EcoStruxure platform.
Unparalleled Reliability: Modularly designed with optional electronic or thermal magnetic protection, ensuring a long lifespan of tens of thousands of operations.
Robust Protection: Comprehensive defense against overloads, short circuits, and ground faults, all while supporting selective coordination.
Expansive Flexibility:Easily customizable with communication modules (such as Modbus and Ethernet) and auxiliary contacts.
Ideal for settings like data centers, factories, and large buildings, renowned for delivering high security, digital management, and energy efficiency, fully compliant with IEC/GB standards.
Working Principle Explained:
The air circuit breaker conducts real-time current monitoring via a current transformer, transmitting the signal to the intelligent controller.
When the intelligent controller detects an anomalous current,it promptly disconnects the contacts within the circuit breaker to securely cut off the circuit, ensuring immediate safety.

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 High-Temperature Resistant & Flame-Retardant Casing - Ensure the ultimate protection with our robust and durable casing that withstands extreme temperatures while preventing fire hazards, offering you peace of mind and safety.
Δ Copper-Plated Silver Alloy Contacts (Dynamic/Static) - Experience unparalleled conductivity and efficiency with our expertly crafted copper-plated silver alloy contacts, designed to maintain stable performance under dynamic and static conditions, maximizing the reliability of your electrical systems.
Δ Silver Alloy Contacts (High Conductivity & Superior Arc Resistance) - Elevate your electrical safety standards with our silver alloy contacts, renowned for their exceptional conductivity and resistance to arcing, ensuring a superior and long-lasting performance for all your heavy-duty electrical needs.
Δ Thick Copper-Plated Silver Busbars (Standard In/Out Terminals) - Trust in our thick copper-plated silver busbars to provide robust and efficient connections, with standard in/out terminals that cater to a variety of applications, delivering steadfast performance under demanding conditions.
Δ PCB Reliability (48-Hour Aging Test Verified) - Rest assured of the reliability and durability of our products with our PCBs that have undergone rigorous 48-hour aging tests, proving their resilience and stability for long-term use.
Installation Instructions
·Our premium models, including MTN and MTH800A to 6300A (excluding 4000A), are designed to offer effortless compatibility with identical connection terminals,;
No additional space is required for front connections, ensuring the circuit breaker's depth remains unchanged,
·For seamless integration on horizontal or vertical busbars, simply rotate the connection terminal a smooth 90 degrees.
1. Mechanical Operation Test:
Delight in the smooth operation of the circuit breaker by ensuring its mechanical capabilities are flexible and reliable.
Evaluate the seamless execution of operations such as closing, opening, and energy storage.
2. Electrical Performance Testing:
Insulation Resistance Test: Harness a megohmmeter to meticulously measure the insulation resistance of both the main and auxiliary circuits, striving for standards (typically ≥ 1M Ω).
Power Frequency Withstand Voltage Test: Enthrall with the application of rated power frequency voltage (such as 2500V/1min) to the main and auxiliary circuits, ensuring impeccable insulation performance.
Contact Resistance Test: Assiduously measure the main contact's resistance, confirming it's below the specified threshold (usually micro-ohm level).
3. Protection Function Test:
Scrutinize the precision of action values and timings for protection functions such as overload, short circuit, and ground fault.
Ensure the impeccable settings andfunctionality of the intelligent release device.
Sturdy Outer Packaging:
Robust wooden boxes ensure exceptional mechanical strength and protection.
Our wooden crates are perfectly suited for larger circuit breakers and international shipping.
Protective Inner Packaging:
Secure the circuit breaker with premium buffer materials like foam pads, bubble films or pearl cotton to safeguard against vibration and impact.
For substantial circuit breakers, our packaging may feature a multi-layered design, with essential accessories (such as instruction manuals, tools, and spare parts) conveniently placed on the top layer.
Efficient Domestic Transportation
With a designated freight forwarder within China, we ensure seamless delivery to your specified location through road transportation or domestic express services once production is finalized.
Swift International Transport Solutions
For smaller shipments requiring urgent delivery to a specified international location, we partner with leading global express delivery services including
DHL, FEDEX, and UPS
Cost-Effective Sea/Air Freight
For bulk orders where timing is flexible, sea freight is our preferred choice. We collaborate with a reputable freight company, which arranges trucks for pickup, transports to the designated port for secure warehousing. Finally, shipments are transported by sea to the customer's chosen port, where customers collect their goods using a bill of lading.
Mingtuo Electric Mingtuo Electric proudly holds a pivotal role not only in the domestic landscape but is also taking robust strides into the international arena. Our esteemed products find widespread application across construction, industry, and energy sectors, consistently earning the trust and favor of numerous prestigious engineering projects.
The company adheres steadfastly to the principle ofcustomer first, quality first, service first, reputation firstand ceaselessly pursues the dynamic concept of innovation and development. The company is endowed with an impressive technical prowess, cutting-edge production technology, and rich industry experience in research and development, establishing itself as a beacon of professionalism and technological leadership. Boasting 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 detailed specifications, please reach out to our dedicated customer support.
Q: What is the MOQ? Do you support sample ordering?
A: The minimum order quantity is a single set, with full support for sample orders, allowing you to experience our quality firsthand.
Q: How long is the warranty period? How to apply for warranty?
A: We offer a generous warranty extending from one to two years. Warranty claims can be seamlessly initiated through direct contact with our customer service team.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: We proudly possess CE and RoHS certifications, and we are fully equipped to provide these certificates upon request.
Q: Does the price include tax/shipping?
A: Please note that our pricing does not encompass shipping or tax.
Q: What famous clients or project cases have you worked with?
A: Our illustrious clientele includes the revered State Grid of China, the influential Chint Group, and the innovative Xiaomi Group.