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: Uncover the state-of-the-art innovations and extraordinary features that distinguish our Premium Quality ACB Air Circuit Breaker in terms of performance and dependability. Prepare to be impressed by its unrivaled capabilities and steadfast reliability that make it an industry leader.
Δ High-Temperature Resistant & Flame-Retardant Casing: Designed with precision to endure extreme conditions, this casing guarantees safety and enduring durability across all operational environments, offering peace of mind and robust protection.
Δ Copper-Plated Silver Alloy Contacts (Dynamic/Static): Enjoy unmatched conductivity and reliability with our meticulously engineered contacts, crafted for peak electrical performance and ensuring seamless electrical connectivity.
Δ Silver Alloy Contacts (High Conductivity & Superior Arc Resistance): Take advantage of remarkable conductivity and enhanced arc resistance, ensuring seamless and efficient electrical connections that empower your systems with precision and reliability.
Δ Thick Copper-Plated Silver Busbars (Standard In/Out Terminals): Constructed for durability, our strong busbars offer stable and secure current flow, adhering to the highest industry standards for performance and longevity.
Δ PCB Reliability (48-Hour Aging Test Verified): Rely on our thoroughly tested PCBs, validated through rigorous 48-hour aging tests to ensure enduring performance and unwavering reliability, promising excellence in every application.
Installation Instructions
· Our distinguished MTN and MTH models, covering an impressive range from 800A to a remarkable 6300A (excluding 4000A), are engineered with unparalleled precision, presenting the same robust connection terminals for consistent performance and reliability.;
Effortless installation is our promise! With our intelligently designed terminals, you won't need extra space for the front connection, ensuring the circuit breaker's depth remains unaffected.
· Whether your connection is to a horizontal or vertical busbar, our superior design guarantees seamless integration. Simply rotate the connection terminal by 90 degrees to achieve optimal alignment, ensuring a perfect fit every time.
Mechanical Operation Test: Ensuring Seamless Functionality
Meticulously examine the mechanical operation of the circuit breaker to certify that it is exceptionally flexible and unfailingly reliable.
Conduct a comprehensive assessment of all operational functionalities, including: secure closing, precise opening, and robust energy storage.
Electrical Performance Testing: A Promise of Safety and Dependability
Insulation Resistance Test: Utilize a megohmmeter to meticulously measure the insulation resistance of both main and auxiliary circuits, ensuring they meet stringent 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 expertly evaluate their insulation capabilities.
Contact Resistance Test: Precisely measure the contact resistance of the primary contact to ensure it remains well within the specified threshold (generally at the micro-ohm level), guaranteeing superior performance.
Protection Function Test: Safeguarding Your Equipment with Precision
Thoroughly evaluate the action values and timing of the protection functions, with keen attention to overload, short circuit, and ground fault scenarios.
Diligently verify the settings andoperational functionality of the intelligent release device, ensuring it operates at peak performance and efficiency.
Outer Packaging:
To ensure the utmost protection of your products, we employ robust packaging solutions that stand the test of time. Our wooden boxes are meticulously engineered, designed to offer unparalleled mechanical strength.
These fortified wooden crates are perfectly crafted for the transportation of large circuit breakers, ensuring their safe journey, especially across international borders.
Inner Packaging:
To provide an added layer of security for the circuit breaker, we enclose it with premium cushioning materials like foam pads, bubble film or pearl cotton which are expertly designed to absorb shocks and prevent any damage from vibrations or collisions.
For larger circuit breakers, our packaging boasts an advanced layered design, with essential accessories including manuals, tools, and spare partsstrategically placed on the upper layer for effortless accessibility and convenience.
Domestic Transportation:
For clients with a designated freight forwarder in China, rest easy knowing that we will coordinate the smooth transportation of your products through road transportation or domestic express services, ensuring timely delivery right after the completion of production.
International Transport:
When smaller shipments require swift international delivery to specified locations, we proudly partner with the world's leading express delivery giants:
DHL, FEDEX, and UPS, ensuring rapid and reliable service.
Sea Freight/Air Freight:
For larger consignments with flexible timing, sea freight is our preferred method. We seamlessly collaborate with a trusted freight company, ensuring efficient truck pickup and transport to the designated port for secure warehousing.Ultimately, the cargo will be shipped by sea with utmost care to the customer's selected port, ready and waiting for pickup with an official bill of lading, guaranteeing a smooth and transparent delivery process.
Mingtuo Electric Zhejiang Mingtuo Electric Technology Co., Ltd. has firmly entrenched itself as a revered leader in the domestic market, and is ambitiously expanding into international markets. Our exceptional products, revered across construction, industry, and energy sectors, are the go-to choice for numerous prestigious engineering projects, earning unwavering trust and admiration from our esteemed clients.
The company adheres to the unwavering principle of customer first, quality first, service first, reputation first, and we remain unwavering in our pursuit of innovation and progressive development. Our company has built a formidable foundation with robust technical strength, state-of-the-art production technology, and extensive experience in research and development. We distinguish ourselves through our professionalism and technological leadership, offering a comprehensive array of the most advanced production, testing, and inspection equipment available nationwide.
FAQ
Q: What is the product voltage/current range? What's the breaking ability?
A: For comprehensive details on voltage, current range, and breaking ability, please reach out to our dedicated customer service team.
Q: What is the MOQ? Do you support sample ordering?
A: Our minimum order quantity is dynamically flexible with a starting point of just 1 set. We are delighted to extend our support for sample ordering to cater to your specific requirements.
Q: How long is the warranty period? How to apply for warranty?
A: Our product warranty spans from one to two years. To apply for warranty service, please connect directly with our dedicated customer service team.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Indeed, we take pride in holding both CE and RoHS certifications and are more than happy to provide these certificates upon your request.
Q: Does the price include tax/shipping?
A: Kindly note that our pricing structure is exclusive of shipping and tax fees.
Q: What famous clients or project cases have you worked with?
A: We have had the privilege of partnering with esteemed clients such as the State Grid of China, Chint Group, and Xiaomi Group, showcasing our unwavering commitment to excellence and reliability.