AIR CIRCUIT BREAKER
MTW1-2000, MTW1-3200, MTW1-4000, MTW1-6300, MTW1-7500
The MTW1 series intelligent breaker is a supreme solution for distribution networks operating at an AC frequency of 50Hz. It is ideally suited for applications requiring a rated voltage of 400V and 690V, offering a rated current ranging from 400Ato7500A. This advanced breaker excels in distributing electric energy while vigilantly protecting circuits and power equipment from potential threats like overload, under-voltage, short circuit and single-phase earth faults. Its state-of-the-art intelligent protection features and precise selective protection substantially enhance the reliability of your power supply, drastically reducing the risk of
unintended power interruptions.The circuit breaker stands out with an impressive impulse withstand voltage rating of8000V at an altitude of 2000 meters, and is adaptable to higher altitudes with a maximum capacity reaching 12000V).
This product complies with the stringent standards of GB14048.2 for low-voltage switchgear and control equipment. It specifically focuses on low-voltage circuit breakers, and it also adheres to IEC60947-2 for low-voltage switchgear and controlling equipment Part 2: Low-voltage circuit breakers.
-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: Experience the pinnacle of precision and efficiency with our cutting-edge control system, thoughtfully engineered for flawless operation and unrivaled performance, ensuring peak productivity and reliability consistently.
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
Expertly crafted from the finest premium red copperBeautifully and elegantly silver Plated material that enhances durability and longevity
Exceptional heat dissipation Delivers unmatched performance for optimal operational efficiency
Boasting high corrosion resistance for prolonged use
Innovative techniques in widening and thickening applied to copper bar size, ensuring superior performance and reliability
Meticulously engineered in compliance with stringent industry standards
CONDUCTIVE SYSTEM
The precise number of contact pieces is determined with expertise based on the current load requirements
The moving contact is crafted with precision from copper luxuriously plated with lustrous silver material
The moving contact is ingeniously engineered from gleaming silver dots, ensuring exceptional conductivity and electrical performance
-Internal components
Conductive parts encompass:
-Copper bars, expertly designed precision contacts
Secondary control part features:
-Wiring terminals, cutting-edge mechanisms, intelligent controllers, robust motors, premium-quality coils, and efficient current transformer
State-of-the-art Arc extinguishing section includes:
-interrupter
-Available in both fixed and innovative drawer type construction for versatile application
Installation Instructions
-Installed inside the panel
Fixed Type Installation:
The circuit breaker is securely mounted on the distribution cabinet or installation board and is immovable once installed, ensuring a steadfast and durable fit.
Ideal for scenarios that do not require frequent switching or ongoing maintenance, offering stability and reliability.
Easy installation and cost-effective setup, making it a budget-friendly choice.
Drawout Type Installation:
The circuit breaker is affixed on a withdrawable frame, allowing for effortless maintenance, testing, and replacement of components.
Perfect for environments that require regular operation or servicing.
Installation is intricate and incurs higher costs, but it provides enhanced adaptabilityto changing needs.
Plug-In Type Installation:
The circuit breaker connects seamlessly to the busbar via a plug-in mechanism, ensuring rapid installation and swift replacement, maximizing efficiency.
This method is perfect for conditions that demand quick replacement, offering speed and convenience.
-Secondary Wiring Method
1 and 2: Connect the intelligent controller seamlessly, promoting smooth operation.
27 and 28:Link the undervoltage coil efficiently, ensuring uninterrupted service.
29 and 30: Securely attach the shunt coil, enhancing performance stability.
31 and 32:Anchor the closed coils firmly, ensuring robust operation.
34 and 35: Connect the energy storage motor reliably, guaranteeing consistent energy management.
Mechanical operation test:
Evaluate the circuit breaker's mechanical operation to ensure it is flexible and reliable.
Thoroughly test the operation functions including closing, opening, and energy storage.
Electrical performance testing:
Conduct an insulation resistance test using a megohmmeter on the main and auxiliary circuits, ensuring compliance with standards (typically ≥ 1M Ω).
Perform a power frequency withstand voltage test by applying the rated voltage (such as 2500V/1min) to both the main and auxiliary circuits to evaluate insulation performance.
Measure the contact resistance of the main contact to verify it remains below the specified threshold (usually within the micro ohm range).
Protection function test:
Assess the action values and timing of protection functions like overload, short circuit, and ground fault.
Confirm the settings andfunctionality of the intelligent release device.
Outer packaging:
To ensure unparalleled protection and strength for our products, we utilize robust and durable wooden boxes that are specifically designed to provide exceptional mechanical strength, safeguarding your investment during transit.
Our wooden crates are exquisitely crafted to perfectly accommodate large circuit breakers and withstand the rigors of international transportation, ensuring your products arrive in pristine condition.
Inner packaging:
To achieve maximum protection for each circuit breaker, we meticulously wrap it with premium buffer materials such as foam pad, bubble film or pearl cotton to effectively mitigate any vibration or collision during transportation, ensuring the integrity of the product.
For larger circuit breakers, we offer a sophisticated packaging solution with an innovative layered design, ensuring that accessories like manuals, tools, and spare partsare conveniently and securely placed on the upper layer, guaranteeing perfect organization and accessibility.
Our production line
Mingtuo Electric Zhejiang Mingtuo Electric Technology Co., Ltd. is a powerhouse in the domestic marketplace and is gaining remarkable recognition globally. Our products are extraordinarily adaptable, providing solutions for crucial sectors like construction, industry, and energy. Our esteemed quality has garnered trust from a plethora of prestigious engineering projects, earning us global acclaim and unwavering customer loyalty.
The company adheres to the unwavering principle ofcustomer first, quality first, service first, reputation firstand is relentless in its pursuit of innovation and development. The company boasts outstanding technical prowess, state-of-the-art production technology, and extensive industry acumen in research and development. Known for its professionalism and technological leadership, the company is equipped with a comprehensive array of China's most advanced production, testing, and inspection equipment.
FAQ
Q: What is the product voltage/current range? What's the breaking ability?
A: For comprehensive details on our product specifications and exceptional breaking capacity, we invite you to contact our dedicated customer service team who will be pleased to assist you.
Q: What is the MOQ? Do you support sample ordering?
A: We are delighted to offer a flexible minimum order quantity of just 1 set, fully supporting sample orders to cater to your every need.
Q: How long is the warranty period? How to apply for warranty?
A: Our products are backed by a robust warranty period ranging from one to two years. You can effortlessly apply for warranty support directly through our customer service team.
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 more than happy to provide these certificates upon your request.
Q: Does the price include tax/shipping?
A: Please be aware that the listed price excludes shipping and tax. For detailed pricing, please contact our sales team.
Q: What famous clients or project cases have you worked with?
A: We have had the honor to collaborate with illustrious clients such as the State Grid of China, Chint Group, and Xiaomi Group, showcasing our commitment to excellence.