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: Explore the revolutionary advancements and exceptional attributes that distinguish our Premium Quality ACB Air Circuit Breaker as a leader in performance and dependability. Experience the pinnacle of technological mastery.
Δ High-Temperature Resistant & Flame-Retardant Casing: Skillfully engineered to endure extreme conditions, our casing ensures unparalleled safety and durability across diverse operational environments, safeguarding your systems with reliability.
Δ Copper-Plated Silver Alloy Contacts (Dynamic/Static): Revel in extraordinary conductivity and trustworthiness with our meticulously crafted contacts, designed to deliver optimal electrical performance and consistency.
Δ Silver Alloy Contacts (High Conductivity & Superior Arc Resistance): Unlock the potential of excellent conductivity combined with outstanding arc resistance, offering you seamless and efficient electrical connections for superior system integration.
Δ Thick Copper-Plated Silver Busbars (Standard In/Out Terminals): Engineered for endurance, our durable busbars ensure unwavering and secure current flow, proudly aligning with and exceeding high industry standards for performance.
Δ PCB Reliability (48-Hour Aging Test Verified): Rely on our rigorously validated PCBs, proven through comprehensive aging tests to deliver enduring performance and unwavering reliability, ensuring your systems operate with excellence.
Installation Instructions
· Discover our elite range of MTN and MTH models, masterfully engineered to handle currents from 800A to a remarkable 6300A (excluding 4000A). Crafted with finesse, these models showcase the same robust connection terminals, ensuring durability and reliability in every application.;
Effortless installation is our promise! Say goodbye to the need for extra space for front connections. Our ingeniously designed terminals maintain their compact form, ensuring the circuit breaker's depth remains unchanged;
· Whether your setup involves a horizontal or vertical busbar, our innovative design guarantees seamless integration. With just a simple 90-degree adjustment, achieve optimal alignment of the connection terminal.
Mechanical Operation Test: A Testament to Smooth Functionality
Diligently verify the mechanical operation of the circuit breaker to ensure it is effortlessly flexible and undeniably reliable.
Conduct an exhaustive examination of all operational functions, including: closing, opening, and energy storage.
Electrical Performance Testing: Our Pledge to Unwavering Safety
Insulation Resistance Test: Utilize a high-precision megohmmeter to meticulously measure the insulation resistance across both main and auxiliary circuits, ensuring rigorous compliance with 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 for 1 minute) to rigorously evaluate their exceptional insulation capabilities.
Contact Resistance Test: Precisely measure the contact resistance at the primary contact to ensure it consistently stays below the specified threshold (customarily at the micro-ohm level).
Protection Function Test: Your Assurance of Equipment Safety
Examine the action values and precise timing of protection functions, centered on overload, short circuit, and ground fault.
Attentively confirm the settings andfunctionality of the intelligent release device, guaranteeing optimal performance and reliability.
Outer Packaging:
We take pride in ensuring that your products are expertly safeguarded by employing highly durable wooden boxes crafted with precision to offer superior mechanical strength and resilience.
These sturdy wooden crates are exceptional for the transportation of large circuit breakers, especially tailored for secure international shipping.
Inner Packaging:
To further protect the circuit breaker, we wrap it meticulously with top-tier cushioning materials such as foam pads, bubble film or pearl cotton ensuring optimal protection against vibrations and impacts.
For larger circuit breakers, our packaging is ingeniously designed with a layered approach, featuring essential accessories like manuals, tools, and spare partsstrategically placed on the top layer for easy and immediate access.
Domestic Transportation:
If you have a preferred freight forwarder within China, rest assured that we will efficiently manage the transportation of your products via road transportation or domestic express services, ensuring prompt delivery as soon as production is finalized.
International Transport:
For smaller consignments requiring rapid delivery to specified international destinations, we engage the renowned services of the leading global express giants:
DHL, FEDEX, and UPS.
Sea Freight/Air Freight:
For bulk consignments with flexible timelines, we choose sea freight. We skillfully collaborate with a trusted freight company, which will arrange truck pickup and transportation to the port designated for warehousing.Finally, the cargo will be securely dispatched 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 firmly cemented its place as a titan within the domestic marketplace, while ambitiously extending its reach into the international scene. Our products are not just utilized but celebrated across sectors such as construction, industry, and energy. They have become the optimal choice for numerous prestigious engineering projects, earning enduring trust and admiration from a wide array of clients.
The company adheres unwaveringly to the principle of customer first, quality first, service first, reputation first, and remains resolute in our quest for groundbreaking innovation and sustained development. Our company has built a formidable foundation with robust technical strength, state-of-the-art production technology, and an extensive wealth of experience in research and development. We distinguish ourselves through our professionalism and technological prowess, maintaining a comprehensive suite of the most cutting-edge production, testing, and inspection equipment available in China.
FAQ
Q: What is the product voltage/current range? What's the breaking ability?
A: For comprehensive details regarding the voltage, current range, and breaking ability of our products, we encourage you to connect with our customer service team, who are eager to assist you.
Q: What is the MOQ? Do you support sample ordering?
A: Our minimum order quantity is remarkably flexible, starting at just 1 set. Additionally, we are delighted to offer support for sample ordering to cater to your needs and preferences.
Q: How long is the warranty period? How to apply for warranty?
A: We proudly offer a product warranty spanning from one to two years. To apply for warranty service, please contact our dedicated customer service team, who are always ready to assist you.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Absolutely, we are proud holders of CE and RoHS certifications and can promptly provide these certificates upon request to assure you of our compliance and quality.
Q: Does the price include tax/shipping?
A: Please be aware that our pricing structure does not include shipping and tax fees, allowing for greater flexibility in your purchasing decisions.
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. These partnerships underscore our unwavering commitment to excellence and reliability in every project we undertake.