AIR CIRCUIT BREAKER
MT/MVS
ACB (Air Circuit Breaker) is a high-performance low-voltage circuit breaker, with prominent models such as MT/NT and MVS series, offering rated currents ranging from 630A~6300A, boasting a remarkable breaking capacity reaching up to 150kA, making it perfectly suited for industrial, commercial, and energy distribution systems.
Core features:
Intelligence: Incorporates a cutting-edge Micrologic release, facilitating advanced real-time monitoring (current, voltage, fault recording) and enables seamless remote control, fully integrated with the pioneering EcoStruxure platform.
High reliability: Showcases a robust, modular design, available with optional electronic/thermal magnetic protection, and boasts a remarkable lifespan rated for tens of thousands of operations.
Comprehensive protection: Delivers reliable overload, short circuit, and ground fault protection, with a capability for selective coordination.
Flexible Expansion:Augmentable with communication modules (Modbus, Ethernet) and auxiliary contacts to cater to versatile applications.
Perfect for data centers, manufacturing plants, and large-scale buildings, lauded for its high security, digital management, and superior energy efficiency, all conforming to IEC/GB standards.
Working principle:
The air circuit breaker continuously monitors the electrical current through a high-precision current transformer, relaying the data to the intelligent controller.
Upon detection by the intelligent controller of any abnormal current, it swiftly disconnects the internal contacts of the circuit breaker to safely interrupt 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 elevate our Premium Quality ACB Air Circuit Breaker to new heights of performance and reliability. Explore an array of pioneering advancements painstakingly designed to exceed industry standards and meet your most demanding electrical needs.
Δ High-Temperature Resistant & Flame-Retardant Casing: Meticulously engineered to endure the harshest conditions, our casing promises unwavering safety and unparalleled durability across all operational environments, securing your peace of mind.
Δ Copper-Plated Silver Alloy Contacts (Dynamic/Static): Immerse yourself in a realm of unmatched conductivity and dependability with our expertly crafted contacts. Designed for optimal electrical performance, these contacts ensure seamless operations.
Δ Silver Alloy Contacts (High Conductivity & Superior Arc Resistance): Take advantage of remarkable conductivity paired with enhanced arc resistance. Our silver alloy contacts provide seamless, efficient electrical connections, setting a new benchmark for performance.
Δ Thick Copper-Plated Silver Busbars (Standard In/Out Terminals): Our durable busbars are engineered to ensure stable, secure current flow. Crafted to meet high industry standards, they promise longevity and reliability in every electrical installation.
Δ PCB Reliability (48-Hour Aging Test Verified): Place your trust in our PCBs, which have been subjected to exhaustive 48-hour aging tests. This rigorous validation process guarantees that our PCBs deliver enduring performance and unwavering reliability.
Installation Instructions
· Explore the excellence of our MTN and MTH models, offering an impressive range from 800A up to a remarkable 6300A (excluding 4000A). These models are meticulously engineered with unparalleled precision, featuring the same durable and robust connection terminals.;
Effortless installation is our promise! There's no need to reserve extra space for the front connection, as our expertly designed terminals maintain the circuit breaker's original depth, ensuring no increase;
· Enjoy seamless integration whether connecting to a horizontal or vertical busbar. Our design facilitates flawless setup with ease. Simply adjust the connection terminal by 90 degrees for perfect alignment and optimal installation.
Mechanical Operation Test: Ensuring Unwavering Functionality and Precision
Thoroughly examine the mechanical operation of our circuit breaker to confirm it remains flexible, and remarkably reliable.
Conduct comprehensive assessments of all operational functions, focusing meticulously on: seamless closing, prompt opening, and efficient energy storage.
Electrical Performance Testing: A Testament to Our Commitment to Safety and Excellence
Insulation Resistance Test: Utilize a high-quality megohmmeter to accurately measure insulation resistance across both main and auxiliary circuits, ensuring they meet the highest industry benchmarks (typically ≥ 1M Ω).
Power Frequency Withstand Voltage Test: Administer the designated power frequency voltage (e.g., 2500V for a full minute) to main and auxiliary circuits to rigorously evaluate their insulation capability.
Contact Resistance Test: Precisely gauge the contact resistance of the primary contact to assure it stays comfortably within the defined limits (generally at the micro-ohm level).
Protection Function Test: Dedicated to Protecting Your Investments
Thoroughly evaluate the precision and timing of our protection functions, concentrating on factors such as overload, short circuit, and ground fault detection.
Ensure the meticulous verification of the settings, as well as therobust functionality of our intelligent release device to guarantee unmatched performance.
Outer Packaging:
We take pride in safeguarding your valued products with the utmost care, using highly resilient wooden boxes that are meticulously engineered to deliver outstanding mechanical strength and durability.
These robust wooden crates are the perfect choice for transporting large circuit breakers, particularly ensuring safe international shipment.
Inner Packaging:
To protect the circuit breaker from potential harm, we wrap it in superior quality cushioning materials such as foam pads, bubble film or pearl cotton to effectively counteract vibrations and impacts.
For larger circuit breaker units, our packaging features an advanced layered design. Essential components like manuals, tools, and spare partsare strategically placed on the top layer for quick and easy access.
Domestic Transportation:
If you have a preferred freight forwarder in China, trust us to transport your products efficiently using road transportation or domestic express services, assuring prompt delivery right after production.
International Transport:
For smaller shipments that demand fast delivery to specific international locations, we partner with the elite trio of global express services:
DHL, FEDEX, and UPS.
Sea Freight/Air Freight:
For larger shipments with more flexible timelines, we expertly coordinate with sea freight. Our collaboration with a reliable freight companyensures seamless pickup and transportation to the designated port for warehousing.Finally, the cargo is securely shipped by sea to the customer's specified port, ready for collection with a bill of lading.
Mingtuo Electric Zhejiang Mingtuo Electric Technology Co., Ltd. has established itself as a powerhouse in the domestic market, and is ambitiously spreading its wings into international waters. Our products, cherished across construction, industry, and energy sectors, are the preferred choice in numerous prestigious engineering projects, garnering trust and admiration from our clients.
The company adheres to the principle of customer first, quality first, service first, reputation first, and we are steadfast in our pursuit of innovation and development. Our company has laid a robust foundation with strong technical strength, cutting-edge production technology, and a wealth of experience in research and development. We stand out for our 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 information regarding the voltage, current range, and breaking ability of our products, our customer service team is at your disposal to provide comprehensive and precise information tailored to your specific requirements.
Q: What is the MOQ? Do you support sample ordering?
A: Our minimum order quantity is remarkably flexible, starting at just 1 set. To accommodate your needs, we are also pleased to extend support for sample ordering, ensuring you can experience the quality of our products firsthand.
Q: How long is the warranty period? How to apply for warranty?
A: We proudly offer a generous product warranty that ranges from one to two years. For a seamless warranty application process, please reach out to our dedicated customer service team who are ready to assist you at every step.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Yes, we are proud holders of CE and RoHS certifications and can gladly provide these certificates upon request, underscoring our commitment to quality and compliance with international standards.
Q: Does the price include tax/shipping?
A: Please be advised that our pricing is exclusive of shipping and tax fees. For a comprehensive quote including these details, please contact our sales team.
Q: What famous clients or project cases have you worked with?
A: We have had the distinct honor of partnering with prestigious clients such as the State Grid of China, Chint Group, and Xiaomi Group, reflecting our unwavering commitment to excellence and innovation.