AIR CIRCUIT BREAKER
Models Available: MTW1-2000, MTW1-3200, MTW1-4000, MTW1-6300, MTW1-7500
The MTW1 series intelligent breaker is expertly designed for AC 50Hz distribution networks, ensuring unparalleled performance with a rated voltage of 400V and 690V, with a robust current rating spanning 400Ato 7500A. This breaker is meticulously engineered to efficiently distribute electric energy, providing steadfast protection to circuits and power equipment against the perils of overload, under-voltage, short circuit and single-phase earth faults etc. Outfitted with an advanced intelligent protection function and precise selective protection, this breaker dramatically enhances power supply reliability, significantly reducing the risk of
unnecessary power interruptions.The circuit breaker boasts a remarkable impulse withstand voltage of8000V at altitudes up to 2000 meters. Customizable for different altitudes, it can reach an upper limit not exceeding 12000V).
This product meets the rigorous standards of GB14048. 2 for low-voltage switchgear and control equipment, specifically the low-voltage circuit breaker, and strictly adheres to IEC60947-2 standards for low-voltage switchgear and control equipment, focusing on the second part: low-voltage circuit breakers.
-Style Options: Drawer style
-Style Options: Fixed style
-Understanding the Model Designations
Pole Number Explained: 4P indicates 4 Poles, 3P indicates 3 Poles
Rated Current Specifications
Design Code Description
Exploring Air Circuit Breaker
Enterprise Code Details

-Control part: Experience the epitome of seamless control and precision with our cutting-edge technology, meticulously designed to ensure optimal performance and unwavering reliability in every application scenario. Elevate your operational standards with this superior control solution.
Shunt
release |
Ue(v) |
AC 220,380/DC110,220 |
Energy-releasing (ON) electromagnet |
Us(v) |
AC 220,380/DC110,220 |
Under-voltage
release |
Ue(v) |
AC 220,380 |
Intelligent type electronic release |
Us(v) |
AC 220,380/DC110,220 |
Motorized operating
mechanism |
Us(v) |
AC 220,380/DC110,220 |
|
|
|
COPPER BAR
Crafted from premium red copper, this component stands as a testament to quality and durability.Adorned with a lustrous silver plated finish material, it adds a touch of sophistication.
Exhibits exceptional heat dissipation capabilities, ensuring unwavering stability and optimal performance.
Boasts impressive corrosion resistance,
Enhanced design with strategic widening and thickening, of the copper bar size greatly enhances durability and reliability.
Perfectly compliant with strict industry standards, ensuring safety and efficiency.
CONDUCTIVE SYSTEM
The number of contact pieces is expertly determined to meet the current capacity requirements, offering precision and reliability.
The moving contact is expertly crafted from copper plated silver, material known for its enhanced durability and strength.
The moving contact features high-quality silver dots that ensure superior conductivity and performance.
-Internal components are meticulously designed for optimal efficiency,
Conductive parts include robust:
-Copper bars and highly efficient contacts ensuring seamless operation.
Secondary control part encompasses:
-Precision wiring terminals, innovative mechanisms, state-of-the-art controllers, advanced motors, high-quality coils, and current
transformers, all crafted for excellence.
Arc extinguishing section offers a highlyreliable interrupter,
-Available in both fixed and drawer type construction, ensuring versatile applications and adaptability.
Installation Instructions
-Installed inside the panel
Fixed Type Installation:
The circuit breaker is meticulously secured onto the distribution cabinet or installation board and remains immovable.
Ideal for environments where replacement or maintenance is infrequent.
Effortless installation and economical cost.
Drawout Type Installation:
The circuit breaker is set upon a specialized withdrawable frame, allowing for convenient maintenance, testing, and replacement.
Perfect for settings demanding regular operation or maintenance.
Though the installation is intricate and costly, it provides enhanced flexibility and adaptability.
Plug in Type Installation:
The circuit breaker seamlessly connects to the busbar via a plug-in connection, facilitating fast and easy installation and swift replacement.
Perfect for scenarios necessitating rapid replacement.
-Secondary Wiring Method
1 and 2: Link the intelligent controller
27 and 28:Connect the undervoltage coil
29 and 30: Integrate the shunt coil
31 and 32:Attach closed coils
34 and 35: Connect the energy storage motor
Mechanical Operation Test: Precision in Every Move
Thoroughly assess whether the mechanical operation of the circuit breaker showcases unparalleled flexibility and steadfast reliability.
Conduct a comprehensive evaluation of operation functions, including smooth closing, precise opening, and efficient energy storage.
Electrical Performance Testing: Guaranteed Safety and Efficiency
Insulation Resistance Test: Employ a high-precision megohmmeter to meticulously measure the insulation resistance of both main and auxiliary circuits, ensuring they adhere impeccably to the stringent standard (typically ≥ 1M Ω).
Power Frequency Withstand Voltage Test: Apply the rated power frequency voltage (e.g., 2500V/1min) to both main and auxiliary circuits, validating their superior insulation performance with confidence.
Contact Resistance Test: Accurately measure the contact resistance of the main contact, ensuring it remains well below the specified value, typically at the micro ohm level, guaranteeing optimal performance.
Protection Function Test: Securing Reliable Operation and Protection
Test and ensure the precise action values and impeccable timing for protection functions, including those against overload, short circuit, and ground fault.
Verify and confirm the meticulous settings andreliable functionality of the intelligent release device, ensuring optimal performance and unwavering safety.
Outer packaging:
Robust and Durable Our wooden boxes are meticulously crafted to provide superior mechanical strength, ensuring that your valuable equipment remains safeguarded at all times.
Wooden crates stand as the ideal solution for securing large circuit breakers during international transit, guaranteeing both safety and integrity.
Inner packaging:
Each circuit breaker is enveloped in premium-grade protective materials, including foam pads, bubble films or pearl cotton, all of which are designed to effectively mitigate vibrations and prevent any potential damages from impacts or collisions.
For our large circuit breakers, the packaging box boasts a sophisticated layered design, incorporating essential accessories such as manuals, tools, and spare partswhich are strategically positioned on the upper layer for enhanced accessibility and convenience.
Our production line
Mingtuo Electric Mingtuo Electric is not only a cornerstone in the domestic market but is also dynamically expanding its global reach. Our superbly crafted products are seamlessly woven into a multitude of sectors, including construction, industry, and energy. Trusted and endorsed by numerous high-profile engineering projects, we are continually reinforcing our worldwide presence.
The company adheres steadfastly to the guiding principle ofcustomer first, quality first, service first, reputation first,while fervently pursuing a philosophy centered on innovation and development. Our company showcases unmatched technical prowess, avant-garde production technology, and exceptional expertise in research and development. Celebrated for our professionalism and technological leadership, we possess a comprehensive suite of state-of-the-art production, testing, and inspection equipment, setting the benchmark in China.
FAQ
Q: What is the product voltage/current range? What's the breaking ability?
A: For comprehensive specifications on voltage/current range and breaking capacity, we invite you to contact our customer service team for expert guidance and support.
Q: What is the MOQ? Do you support sample ordering?
A: The minimum order quantity is 1 set, and we proudly offer sample ordering to assure your satisfaction and accommodate your testing needs.
Q: How long is the warranty period? How to apply for warranty?
A: Rest assured with a warranty period of one to two years. For warranty applications, please contact our customer service for smooth and efficient assistance.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: We proudly hold CE and RoHS certifications and are delighted to provide these certificates upon request, highlighting our unwavering commitment to quality and compliance.
Q: Does the price include tax/shipping?
A: Please be advised that our prices do not include shipping and tax. We are pleased to offer detailed estimates upon your inquiry.
Q: What famous clients or project cases have you worked with?
A: We proudly partner with esteemed clients, such as the State Grid of China, Chint Group, and Xiaomi Group, underscoring our proven excellence and reliability.