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: Immerse yourself in the realm of advanced technology with our Premium Quality ACB Air Circuit Breaker. With groundbreaking innovations and superior features, it stands out in performance, infusing your industrial applications with unmatched reliability.
Δ High-Temperature Resistant & Flame-Retardant Casing: Be assured of safety and durability in any scenario with our casing that is meticulously engineered to endure extreme conditions effortlessly.
Δ Copper-Plated Silver Alloy Contacts (Dynamic/Static): Revel in optimum electrical performance with our contacts that promise exceptional conductivity and reliability, crafted with precision for your peace of mind.
Δ Silver Alloy Contacts (High Conductivity & Superior Arc Resistance): Enjoy effortless and efficient electrical connections with our contacts, designed to provide excellent conductivity alongside enhanced arc resistance.
Δ Thick Copper-Plated Silver Busbars (Standard In/Out Terminals): Experience the assurance of stable and secure current flow with our robust busbars, designed to meet and exceed high industry standards in durability and reliability.
Δ PCB Reliability (48-Hour Aging Test Verified): Rely on our PCBs that have undergone rigorous testing, including a 48-hour aging test, ensuring sustained performance and steadfast reliability in every application.
Installation Instructions
· Discover the unparalleled performance of our MTN and MTH models! These exceptional air circuit breakers offer a versatile range from 800A to an astounding 6300A (excluding 4000A). Meticulously engineered with precision, they boast the same exceptionally sturdy connection terminals;
Effortless installation is paramount! Our ingeniously crafted terminals eliminate the need for extra space dedicated to front connections, ensuring that your circuit breaker's depth remains unchanged;
· Whether connecting to a horizontal or vertical busbar, our design guarantees flawless integration. Simply adjust the connection terminal by 90 degrees to achieve perfect alignment and efficiency.
Mechanical Operation Test: Guaranteeing Flawless and Smooth Functionality
Conduct a meticulous examination of the mechanical operations of the circuit breaker to ensure it is optimally flexible and unwaveringly reliable in performance.
Thoroughly assess operational functions, meticulously testing: seamless closing, precise opening, and effective energy storage capacity.
Electrical Performance Testing: Upholding Unrivaled Safety Standards
Insulation Resistance Test: Utilize a megohmmeter to accurately measure the insulation resistance of both main and auxiliary circuits, ensuring they meet or exceed rigorous industry standards (typically ≥ 1M Ω).
Power Frequency Withstand Voltage Test: Subject both main and auxiliary circuits to the rated power frequency voltage (e.g., 2500V applied for 1 minute) to rigorously evaluate their insulation capabilities.
Contact Resistance Test: Precisely measure the contact resistance of the primary contact, ensuring it stays well below the specified threshold (commonly at the micro-ohm level).
Protection Function Test: Robust Safeguarding for Your Equipment
Assess the responsiveness and accuracy of the protection functions, concentrating on potential risks such as overload, short circuit occurrences, and ground fault issues.
Meticulously verify the calibrations and ensure theoptimal functionality of the intelligent release device, guaranteeing peak operational 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. proudly stands as a dominant force within the domestic arena, now ambitiously expanding its influence on the global stage. Our products are highly coveted across the construction, industrial, and energy sectors, making them the top choice for a variety of esteemed engineering projects. This has earned us the unwavering trust and admiration of our discerning clientele.
The company adheres to the principle of customer first, quality first, service first, reputation first, and we are unwaveringly committed to innovation and growth. Our enterprise has built a solid foundation characterized by exceptional technical prowess, state-of-the-art production techniques, and extensive experience in research and development. We distinguish ourselves through unmatched professionalism and technological leadership, equipped with a full suite of the most sophisticated production, testing, and inspection apparatus 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, we invite you to contact our dedicated customer service team.
Q: What is the MOQ? Do you support sample ordering?
A: Our minimum order quantity is impressively flexible at just 1 set, and we are delighted to facilitate sample ordering to accommodate your requirements.
Q: How long is the warranty period? How to apply for warranty?
A: We provide a warranty period ranging from one to two years. For warranty claims, please directly connect with our attentive customer service team.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Indeed, we proudly possess CE and RoHS certifications and can gladly furnish these documents upon your request.
Q: Does the price include tax/shipping?
A: Please be advised that our pricing structure excludes shipping and tax charges.
Q: What famous clients or project cases have you worked with?
A: We have had the privilege of collaborating with renowned clients such as the State Grid of China, Chint Group, and Xiaomi Group, underscoring our steadfast dedication to quality and dependability.