AIR CIRCUIT BREAKER
MTW1-2000, MTW1-3200, MTW1-4000, MTW1-6300, MTW1-7500
MTW1 series intelligent breaker is designed for distribution networks operating at an AC frequency of 50Hz, with a rated voltage of 400V and 690V, and supports a robust rated current range from 400Ato 7500A. This ensures efficient distribution of electric energy while safeguarding circuits and power equipment from the detrimental effects of overload, under-voltage, short circuit and single-phase earth faults etc. Equipped with an intelligent protection function and precision selective protection, this breaker enhances power supply reliability and prevents
unnecessary power outages.The circuit breaker boasts an impressive impulse withstand voltage capability of8000V , suitable for altitudes up to 2000 meters, and adjustable according to standards for varying altitudes, with a maximum threshold not exceeding 12000V.
This innovative product aligns with the rigorous standards of GB14048.2 for low-voltage switchgear and control equipment. It is fully compliant with the low-voltage circuit breaker standards of IEC60947-2 for low-voltage switchgear and control equipment, Part 2: low-voltage circuit breaker.
-Style: Drawer style
-Style: Fixed style
-Model Meaning
Pole number (4P indicates 4 Pole, 3P indicates 3 Pole)
Rated Current
Design code
Air Circuit Breaker
Enterprise code

-Control part
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 copperwith high-grade silver plated material finish
This combination ensures exceptional heat dissipation performance
and remarkable corrosion resistance
The strategic Widening and thickening of the copper bar size enhances efficiency
while being fully compliant with industry standards
CONDUCTIVE SYSTEM
The optimal number of contact pieces is meticulously determined by the current requirements
The robust moving contact is crafted from copper plated with durable silver material
The moving contact comprises silver dots, ensuring superior conductivity
-Internal components
Conductive parts include:
-Precision Copper bars, high-grade contacts
Secondary control part encompasses:
-Advanced wiring terminals, sophisticated mechanisms, reliable controllers, efficient motors, durable coils, and current transformers
Arc extinguishing section integrates:
-state-of-the-art interrupter
-Available in both fixed and versatile drawer type constructions
Installation Instructions
-Installed inside the panel
Fixed Type Installation:
The circuit breaker is directly affixed to the distribution cabinet or installation board and remains immobile.
Ideal for scenarios where replacement or maintenance is infrequent.
This type offers a seamless installation and is cost-effective.
Drawout Type Installation:
The circuit breaker is mounted on a withdrawable frame, allowing convenient maintenance, testing, and replacement taskswith ease.
Perfect for settings that demand frequent operational adjustments or regular maintenance.
Though the installation is more complex and involves higher costs, it provides superior adaptability.
Plug-in Type Installation:
The circuit breaker connects to the busbar via a plug-in connection, facilitating swift and effortless installation and replacement.
Best suited for environments requiring rapid replacement cycles.
-Secondary Wiring Method
1 and 2: Link the intelligent controller
27 and 28:Link the undervoltage coil
29 and 30: Link the shunt coil
31 and 32:Link closed coils
34 and 35: Link the energy storage motor
Rigorous Mechanical Operation Test:
Ensure that the mechanical operation of the circuit breaker is thoroughly flexible, unfailingly reliable,providing unmatched performance.
Comprehensive testing includes operation functions such as closing,swift opening,and seamless energy storage management.Each function is assessed to ensure optimal performance.
In-Depth Electrical Performance Testing:
Insulation Resistance Test: Employ a precise megohmmeter to measure the insulation resistance of both the main and auxiliary circuits, guaranteeing adherence to the highest standards (typically ≥ 1M Ω).
Power Frequency Withstand Voltage Test: Administer the rated power frequency voltage (e.g., 2500V/1min) to the main and auxiliary circuits to scrutinize insulation integrity.
Contact Resistance Test: Accurately measure the contact resistance of the primary contact to confirm it remains below the designated threshold (commonly at the micro ohm level).
Comprehensive Protection Function Test:
Evaluate the precision of action values and durations in protection functions, including overload, short circuit, and ground fault,ensuring robust safety.
Authenticate the settings and impeccablefunctionality of the advanced intelligent release device, ensuring cutting-edge protection.
Outer packaging: Ensuring Maximum Protection
Robust and Reliable Our strong wooden boxes are meticulously crafted to provide exceptional mechanical strength, ensuring the utmost protection for our products.
A wooden crate is employed, especially suitable for large circuit breakers or international transport, guaranteeing safety and integrity during transit.
Inner packaging: Precision and Care
The circuit breaker is meticulously wrapped with premium buffer materials such as high-quality foam pads, durable bubble films or resilient pearl cotton to effectively prevent any vibration and collision, safeguarding the product's integrity.
For larger circuit breakers, the packaging box may feature an innovative layered design, with essential accessories (such as detailed manuals, necessary tools, and spare parts) conveniently placed on the upper layer for easy access and organization.
Our production line: Precision, Quality, Excellence
Mingtuo Electric Mingtuo Electric stands as a formidable force not only in the domestic market but is making significant strides internationally. Our cutting-edge products are extensively utilized in vital sectors such as construction, industry, and energy, earning the trust and admiration of numerous high-profile engineering projects around the globe.
The company adheres unwaveringly to the principle ofcustomer first, quality first, service first, reputation firstand is on a relentless quest for innovation and growth. Our company boasts a robust technical foundation, state-of-the-art production technology, and seasoned expertise in research and development. We are hailed for our professional excellence and technological innovation, supported by a complete array 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 specifications, kindly reach out to our dedicated customer service team.
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 accommodate your needs.
Q: How long is the warranty period? How to apply for warranty?
A: Enjoy a product warranty spanning one to two years. For any claims, please contact our responsive customer service team directly.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Our products come with globally recognized CE and RoHS certifications, and we can readily provide the necessary documentation.
Q: Does the price include tax/shipping?
A: Please note that the listed price excludes shipping and tax.
Q: What famous clients or project cases have you worked with?
A: We have successfully collaborated with prestigious clients such as the State Grid of China, Chint Group, and Xiaomi Group.