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: Discover the cutting-edge innovations and superior features that distinguish our Premium Quality ACB Air Circuit Breaker. Engineered for peak performance and unwavering reliability, it's the epitome of modern electrical solutions.
Δ High-Temperature Resistant & Flame-Retardant Casing: Meticulously engineered to endure the most extreme conditions, this casing promises unmatched safety and longevity across diverse operational environments.
Δ Copper-Plated Silver Alloy Contacts (Dynamic/Static): Enjoy exceptional conductivity and reliability with contacts that are masterfully designed to ensure optimal electrical performance, tailored to meet every demand.
Δ Silver Alloy Contacts (High Conductivity & Superior Arc Resistance): Revel in superior conductivity and outstanding arc resistance, ensuring flawless and efficient electrical connections every time.
Δ Thick Copper-Plated Silver Busbars (Standard In/Out Terminals): Constructed for endurance, these robust busbars guarantee stable and secure current flow, adhering to the highest industry standards for quality and performance.
Δ PCB Reliability (48-Hour Aging Test Verified): Place your trust in our meticulously tested PCBs, which have been rigorously validated through extensive aging tests to ensure consistent and reliable performance over time.
Installation Instructions
· Presenting our MTN and MTH models, with an exceptional range from 800A to a powerful 6300A (excluding the unique 4000A), all crafted with meticulous precision, boasting the same sturdy and reliable connection terminals that ensure stability and durability.;
Effortless installation is our promise! Our expertly engineered terminals are designed to eliminate the need for additional space in the front connection, ensuring that the circuit breaker's depth remains unaffected;
· Whether you're connecting to a horizontal or vertical busbar, our innovative design guarantees seamless integration. Simply adjust the connection terminal by an easy 90 degrees for optimal alignment, ensuring a perfect fit every time.
Mechanical Operation Test: Ensuring Smooth Functionality
Meticulously inspect the mechanical operation of the circuit breaker to guarantee it performs with flexibility and reliability.
Conduct comprehensive tests on all operational functions, including essential actions like: closing, opening, and energy storage.
Electrical Performance Testing: A Commitment to Safety and Excellence
Insulation Resistance Test: Utilize a megohmmeter to measure the insulation resistance of both main and auxiliary circuits, ensuring strict adherence to industry benchmarks (typically ≥ 1M Ω).
Power Frequency Withstand Voltage Test: Implore the circuits to endure the rated power frequency voltage (e.g., 2500V for 1 minute) to affirm their robust insulation capabilities.
Contact Resistance Test: Precisely assess the contact resistance of the primary contact to confirm it stays well within the specified limits (typically in the micro-ohm range).
Protection Function Test: Safeguarding Your Equipment with Precision
Scrutinize the action values and timing of protection functions, with a keen focus on overload, short circuit, and ground fault.
Diligently verify the settings andfunctionality of the intelligent release device, assuring 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, ensuring they arrive at their destination securely, making them perfect for 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, ensuring optimal protection during transit.
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, ensuring easy access and organization.
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 and efficient delivery immediately after 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 seamless pickup with a bill of lading.
Mingtuo Electric At the forefront of innovation, Zhejiang Mingtuo Electric Technology Co., Ltd. has solidified its reputation as a formidable force within the domestic arena, now setting its sights on a global expansion. Revered for our exceptional products, we have become an indispensable part of the construction, industry, and energy sectors. Our solutions are the top choice for numerous elite engineering projects, earning the unwavering trust and admiration of our esteemed clients.
Guided by the unwavering principle of putting the customer first and maintaining an unwavering commitment to quality, service, and reputation above all, we are relentless in our quest for innovation and growth. Our company is built on a strong foundation characterized by impressive technical prowess, state-of-the-art production techniques, and a rich reservoir of expertise in research and development. Distinguished by our professionalism and technological leadership, we offer an extensive range 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: To obtain detailed specifications regarding voltage, current range, and breaking ability, please feel free to connect with our friendly customer service team.
Q: What is the MOQ? Do you support sample ordering?
A: We offer flexible minimum order quantities starting from just 1 set, and we gladly support sample orders to cater to your specific requirements.
Q: How long is the warranty period? How to apply for warranty?
A: Our products come with a warranty period of one to two years. To apply for warranty service, simply reach out to our specialized customer service team.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Absolutely, we proudly hold CE and RoHS certifications and can promptly provide these certificates upon your request.
Q: Does the price include tax/shipping?
A: Please be advised that our prices are listed exclusive of shipping and tax fees.
Q: What famous clients or project cases have you worked with?
A: We have collaborated with prestigious clients such as the State Grid of China, Chint Group, and Xiaomi Group, reflecting our steadfast commitment to unmatched excellence and reliability.