AIR CIRCUIT BREAKER
MT/MVS
ACB (Air Circuit Breaker) is a high-performance, low-voltage circuit breaker designed to deliver unparalleled reliability and efficiency. Its versatile range includes MT/NT and MVS series, catering to rated currents from 630A to 6300A, and boasts a remarkable breaking capacity of up to 150kA.Ideal for a wide spectrum of applications, including industrial, commercial, and energy distribution systems.
Core features:
Intelligence: Equipped with an innovative Micrologic release, it provides real-time monitoring (current, voltage, fault recording) and remote control, seamlessly integrating with the EcoStruxure platform.
High reliability: The modular design includes optional electronic/thermal magnetic protection, ensuring a lifespan of tens of thousands of operations, guaranteeing peace of mind.
Comprehensive protection: Offers robust protection against overloads, short circuits, and ground faults while supporting selective coordination for enhanced system safety.
Flexible Expansion:With adaptable communication modules likeModbus and Ethernet), plus additional auxiliary contacts, it adapts to diverse operational needs.
Perfect for data centers, factories, and large facilities, it excels in safety, digital management, and energy efficiency, meeting IEC/GB standards effortlessly.
Working principle:
The air circuit breaker meticulously monitors circuit current in real-time via a current transformer, which relays signals to the intelligent controller.
Upon detection of abnormal current,the controller swiftly initiates disconnection of contacts, effectively cutting off the circuit,

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:
ΔHigh-Temperature Resistant & Flame-Retardant Casing: Built with exceptional materials, the casing of our ACb Switch Circuit Breaker is designed to withstand intense heat and resist flames, ensuring maximum safety and longevity.
ΔCopper-Plated Silver Alloy Contacts (Dynamic/Static): Experience superior performance with our dynamic and static contacts that are meticulously crafted from copper-plated silver alloy, offering unparalleled durability and efficient conductivity.
ΔSilver Alloy Contacts (High Conductivity & Superior Arc Resistance): Our ACb Switch Circuit Breaker features silver alloy contacts that provide outstanding electrical conductivity and exceptional resistance to arcs, ensuring reliable operation.
ΔThick Copper-Plated Silver Busbars (Standard In/Out Terminals): Discover dependable connectivity with our robust busbars, plated with copper and silver, designed to fit standard input and output terminals effortlessly.
ΔPCB Reliability (48-Hour Aging Test Verified): Rest assured with the reliability of our product, proven through a rigorous 48-hour aging test, confirming the PCB's exceptional performance over prolonged usage.
Installation Instructions
· The MTN and MTH800A to 6300A (excluding 4000A) range offer identical connection terminals,;
ensuring you don't need to allocate extra space for front connections since the terminals maintain the circuit breaker's compact depth;
· For seamless integration with either horizontal or vertical busbars, just rotate the connection terminal a swift 90 degrees for optimal alignment.
Mechanical operation test:
Ensure the seamless and smooth mechanical operation of the circuit breaker is flexible and reliable, ensuring consistent performance.
Conduct comprehensive operation tests on functionalities such as closing, opening, and energy storage, to guarantee impeccable operation.
Electrical performance testing:
Insulation resistance test: Deploy a megohmmeter to precisely measure the insulation resistance of both main and auxiliary circuits, ensuring they surpass the standard requirements (usually ≥ 1M Ω).
Power frequency withstand voltage test: Subject the main and auxiliary circuits to a rated power frequency voltage (such as 2500V/1min) to meticulously validate their insulation performance.
Contact resistance test: Accurately measure the contact resistance of the main contact, ensuring it remains comfortably below the specified value, typically at a micro ohm level, for optimum functionality.
Protection function test:
Evaluate the precise action values and timing of protection functions such as overload, short circuit, and ground fault, ensuring their reliability.
Verify the meticulous settings andfunctionality of the sophisticated intelligent release device for optimal safety and performance.
Outer Packaging:
Robust wooden crates are meticulously selected to ensure optimal mechanical strength.
Ideal for large circuit breakers or international shipments
Inner Packaging:
The circuit breaker is lovingly encased with protective layers like foam padding, bubble wrap or pearl cotton to safeguard against any jolts or impacts.
For larger breakers, a multi-tiered box design is employed, with additional items (such as instruction manuals, tools, spare components) elegantly arranged on the top layer
Domestic Transportation
Should you have a preferred freight forwarder in China, we ensure seamless delivery to their specified location via road haulage or local express services post-production completion
International Transport
For smaller quantities or time-sensitive deliveries to an overseas specified location, we partner with top-tier global couriers such as
DHL, FEDEX, UPS
Sea Freight/Air Freight
For bulk shipments without immediate time constraints, sea freight is preferred. We engage with a reputable shipping company, coordinating seamless goods pick-up and delivery to the designated port for warehousing. Subsequently, the goods embark on their sea journey to the client's specified port, where the customer will collect them with the necessary bill of lading.
Mingtuo Electric Mingtuo Electric is not only a cornerstone in the domestic market but is also making significant strides internationally. Our products are integral to construction, industry, and energy sectors, earning the trust and preference of countless engineering projects worldwide.
The company adheres to the principle ofputting customer satisfaction, quality production, exceptional service, and esteemed reputation as our highest priorities.We are committed to innovation and development, and the company boasts robust technical capabilities, cutting-edge production technologies, and extensive industry experience in research and development. Renowned for our expertise and leadership in technology, we utilize a comprehensive suite of top-tier 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 specifications, please contact our customer service team.
Q: What is the MOQ? Do you support sample ordering?
A: The minimum order quantity is one set. We are pleased to offer sample ordering for your convenience.
Q: How long is the warranty period? How to apply for warranty?
A: Enjoy peace of mind with a warranty period ranging from one to two years. Simply reach out to our customer service to initiate a warranty claim.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Yes, we possess CE and RoHS certifications and can readily provide these certificates upon request.
Q: Does the price include tax/shipping?
A: Please note that prices are exclusive of shipping and tax.
Q: What famous clients or project cases have you worked with?
A: Our esteemed clientele includes prominent entities such as the State Grid of China, Chint Group, and Xiaomi Group.