AIR CIRCUIT BREAKER
MT/MVS
ACB (Air Circuit Breaker) is a high-performance low-voltage circuit breaker, with distinguished models such as MT/NT and MVS series, offering a versatile range of rated currents spanning 630A~6300A, boasting a remarkable breaking capacity reaching up to 150kA, ideally suited for industrial and commercial environments, along with energy distribution systems.
Core features:
Intelligence: Equipped with a state-of-the-art Micrologic release mechanism, facilitating real-time monitoring capabilities (such as current, voltage, and fault recording) and offering the convenience of remote control, fully compatible with the EcoStruxure platform.
High reliability: Innovative modular design, featuring optional electronic or thermal magnetic protection, ensuring a lifespan of tens of thousands of operational cycles.
Comprehensive protection: Delivers robust overload, short circuit, and ground fault protection, supporting selective coordination strategies.
Flexible Expansion:Easily integrates additional communication modules (such as Modbus and Ethernet) alongside auxiliary contact options.
Perfectly tailored for demanding environments like data centers, manufacturing plants, and expansive buildings, acclaimed for its outstanding security features, sophisticated digital management, and impressive energy efficiency, compliant with IEC/GB standards.
Working principle:
The air circuit breaker continuously monitors the electrical current within a circuit via a precision current transformer. This data is then transmitted to an intelligent controller.
Upon detection of any abnormal current, the intelligent controller promptly disconnects the internal contacts of the circuit breaker, thereby interrupting the circuit to ensure safety and prevent damage

Current |
630A-6300A |
Number of pole |
3P 4P |
Breaking Capacity |
N1,N2,H1,H1B,H2,H3,L1 |
Type |
Fixed Drawer |
Model |
MT/NW/MVS |
Exceptional Product Features:
Δ Designed with a high-temperature resistant and flame-retardant casing, ensuring superior safety and durability even under extreme conditions.
Δ Equipped with dynamic and static copper-plated silver alloy contacts, guaranteeing exceptional performance and reliability.
Δ Features silver alloy contacts that offer high conductivity and superior arc resistance, providing robust electrical protection.
Δ Constructed with thick copper-plated silver busbars as standard in and out terminals, delivering enhanced electrical performance and stability.
Δ The product's PCB reliability is assured through a rigorous 48-hour aging test, ensuring long-lasting performance and dependability.
Installation Instructions
·MTN, MTH800A to 6300A (except 4000A) come equipped with the same connection terminals for seamless installation.;
Enjoy a hassle-free setup with no need to allocate extra space for front connections, as our innovative design ensures that terminal dimensions do not increase the depth of the circuit breaker;
·For compatibility with both horizontal and vertical busbar configurations, simply rotate the connection terminal 90 degrees for perfect alignment.
Mechanical Operation Test:
Thoroughly check the circuit breaker's mechanical operation to ensure it is flexible and reliable. This guarantees seamless performance.
Evaluate operation functions including closing, opening, and energy storage. Confirm these actions meet stringent standards.
Electrical Performance Testing:
Insulation Resistance Test: Employ a megohmmeter to measure the insulation resistance of both main and auxiliary circuits, ensuring compliance with standards (typically ≥ 1M Ω).
Power Frequency Withstand Voltage Test: Administer rated power frequency voltage (e.g., 2500V/1min) to both main and auxiliary circuits, verifying superior insulation performance.
Contact Resistance Test: Precisely measure the main contact's resistance to confirm it remains below the designated threshold (generally in the micro ohm range).
Protection Function Test: A Critical Evaluation
Assess the activation values and timing of crucial protection functions like overload, short circuit, and ground fault. This ensures optimal safety and performance.
Validate the settings andfunctionality of the intelligent release device to ensure peak operational efficiency.
Outer packaging:
Robust and Reliable wooden boxes are typically employed to ensure optimal mechanical strength, providing an impenetrable shield for your goods.
Our wooden crates are particularly suited for accommodating large circuit breakers or facilitating international transportation.
Inner packaging:
Envelop the circuit breaker with protective, cushioned materials such as foam pads, bubble films or pearl cotton to safeguard against any vibration and potential impacts.
For substantial circuit breakers, a sophisticated layered packaging design may be utilized, with essential accessories (including manuals, tools, spare parts) conveniently positioned on the upper tier.
Domestic transportation
If a designated freight forwarder is available in China, we will expertly transport the products to the specified location using road transportation or domestic express delivery services, ensuring timely fulfillment post-production.
International transport
For smaller consignments with urgent timelines requiring delivery to a designated international location, we partner with the industry-leading express delivery giants:
DHL, FEDEX, UPS
Sea freight/air freight
For larger shipments where urgency is relaxed, we opt for sea freight, carefully selecting a reputable freight company, which will coordinate truck services to collect the goods and deliver them to the designated port for warehousing. Finally, the cargo will embark on its sea journey to the customer's specified port, where the customer will retrieve the goods using a bill of lading.
Mingtuo Electric Not only does Mingtuo Electric hold a distinguished and impactful position within the domestic market, but it is also making significant strides towards international expansion. Our products find extensive applications across vital sectors such as construction, industry, and energy, earning the trust and preference of a multitude of engineering projects worldwide.
The company stays committed to the principle ofcustomer first, quality first, service first, reputation first,and relentlessly pursues a vision of innovation and progressive development. Mingtuo Electric is equipped with robust technological capabilities, cutting-edge production technology, and mature experience in research and development, earning a reputation for unparalleled professionalism and technological excellence. The company is outfitted with the most sophisticated production, testing, and inspection equipment available in China.
FAQ
Q: What is the product voltage/current range? What's the breaking ability?
A: Please reach out to our dedicated customer service team for comprehensive details.
Q: What is the MOQ? Do you support sample ordering?
A: The minimum order quantity is 1 set, and we proudly support sample orders to ensure customer satisfaction.
Q: How long is the warranty period? How to apply for warranty?
A: Our products come with a warranty period ranging from one to two years. For warranty service, you can apply directly through our efficient customer service channels.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Yes, we possess CE and RoHS certifications and are delighted to provide these certificates upon request.
Q: Does the price include tax/shipping?
A: The quoted price is exclusive of shipping and tax charges.
Q: What famous clients or project cases have you worked with?
A: We are proud partners with renowned entities such as State Grid of China, Chint Group, and Xiaomi Group.