ACB/Air Circuit Breaker
MT/MVS Series
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General product information:
Place of Origin: |
5th Floor, No. 3, Jinghong West Road, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province |
Price: |
1000$ |
Brand Name: |
MINGTUO |
Packaging Details: |
Wooden box packaging |
Model Number: |
ACB NT-630 |
Delivery Time: |
Within fifteen days |
| Certification: | IOS CE ROHS | Payment Terms: |
100% prepaid, 70%/30%, 80%/20% |
Minimum Order Quantity: |
1 |
Supply Ability: |
Available at any time |
Description：
Air circuit breakers (ACBs) are high-performance low-voltage circuit breakers, with representative models including the MT/NT and MVS series. Rated current ranges from 630A to 6300A, with breaking capacity up to 150kA. Suitable for industrial, commercial, and energy distribution systems.
Key Features:
Intelligent: Built-in Micrologic trip module supports real-time monitoring (current, voltage, fault logging) and remote control, compatible with the EcoStruxure platform.
High Reliability: Modular design, optional electronic/thermal-magnetic protection, service life up to tens of thousands of operations.
Comprehensive Protection: Provides overload, short-circuit, and ground fault protection, and supports selective coordination.
Flexible Expansion: Can be equipped with communication modules (Modbus, Ethernet) and auxiliary contacts.
Suitable for data centers, factories, and large buildings, featuring high security, digital management, and low energy consumption, compliant with IEC/GB standards.
Working principle：
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An air circuit breaker (ACB) operates by automatically cutting off current when it detects an overload or short circuit. During normal operation, its main contacts remain closed, allowing current to flow freely. When a sustained overcurrent occurs, the thermal element bends due to heat, triggering the circuit breaker mechanism. In the event of a sudden short circuit, the solenoid coil generates a momentary magnetic force that trips the circuit breaker mechanism. This action rapidly separates the main contacts. A strong electric arc is generated between the separated contacts and is immediately sent to the arc-extinguishing chamber, where the arc is broken up, cooled, and extinguished, thus safely disconnecting the circuit and preventing system damage. |
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Copper bar: The factory selects and purchases used units, then disassembles them to remove the copper busbars and side plates for replating Or replaces the copper busbars entirely. The replated busbars offer high conductivity, along with increased resistance to oxidation and corrosion. |
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Controller: Controller such as 2.0, 2.0A, 2.0E, 5.0A, and 5.0E are available for selection. After inspection and testing, if any controller fails to operate properly, the factory will replace it and conduct another round of testing to ensure normal operation and fully functional protection. ● Basic protection only → Model 2.0 ● Alarm signal required → Model 2.0A ● Earth leakage protection required → Model 2.0E ● Energy monitoring + communication required → Model 5.0A ● Energy monitoring + earth leakage protection + communication required → Model 5.0E |
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Motor/Coil: After inspection, if the motor or coil is found to be inoperable, the factory will replace them. The entire ACB is then tested to verify proper motor operation and ensure the unit can open and close correctly. This guarantees full functionality of the motor and coil. For currents below 2000A, a small motor (NT/N1 series) is used, while a large motor (NW/H1 series) is employed for currents above 2000A. |
✳Tips:We can also sell internal accessories separately
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Pre-wired Terminal Block
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Motor
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MN UVR Coil MX SHT Coil
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Control Unit Micrologic
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Sensor Plug
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Auxiliary Contact
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Machinism
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Copper Bar
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Mechanical Interlocking
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Production line:
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Process
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Quick Detail:
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Air Circuit Breaker ACB LV ACB (Low Voltage Air Circuit Breaker) Fixed Air Circuit Breaker Fixed ACB 2000A Circuit Breaker 1600A ACB 2000A Frame ACB 6300A ACB Medium-Frame ACB Circuit Protector Power Circuit Breaker Main Circuit Breaker Industrial Circuit Breaker Fixed Mount Circuit Breaker Drawer-type air circuit breaker |
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The Air Circuit Breaker (ACB) is designed for the primary protection and control of electrical power distribution networks. It serves as a critical safety component in low-voltage systems, reliably interrupting fault currents and preventing damage to downstream equipment from overloads and short circuits. Its robust design ensures operational continuity and safety for personnel and assets in industrial plants, commercial buildings, and large infrastructure projects.
Test Process：
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Mechanical operation test: ● Check whether the mechanical operation of the circuit breaker is flexible and reliable. ● Test the operation functions such as closing, opening, and energy storage. Electrical performance testing: ● Insulation resistance test: Use a megohmmeter to measure the insulation resistance of the main and auxiliary circuits, ensuring that they meet the standard (usually ≥ 1M Ω). ● Power frequency withstand voltage test: Apply rated power frequency voltage (such as 2500V/1min) to the main circuit and auxiliary circuit to check the insulation performance. ● Contact resistance test: Measure the contact resistance of the main contact to ensure that it is below the specified value (usually micro ohm level). Protection function test: ● Test the action values and time of protection functions such as overload, short circuit, and ground fault. ● Verify the settings and functionality of the intelligent release device. |
Controller testing and product testing:
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1.Power-on test
Manually open and close the circuit 3-5 times to check if the operating mechanism is flexible, without jamming or abnormal noise. Perform wiring tests to verify remote opening and closing functions.
2. Test protection functions:
overload protection (long-time delay L), short-circuit protection (instantaneous/short-time delay I), and earth fault protection (G).
3. Visual inspection:
* Check the controller housing for any damage.
* Ensure all wiring connections are secure and not loose.
* Verify the display screen (if available) is functioning normally.
* Power supply testing:
* Measure the control power supply voltage to confirm it meets specifications (typically 24V DC or 110/220V AC).
* Check the status of the power indicator light.
Renovation process：
1.Used Product Selection:
We select products with intact barcodes, recent manufacturing dates, fully functional opening/closing and energy storage mechanisms, and relatively intact appearance without damage.
2.Refurbishment Process：
First, completely disassemble the used products. Then, clean the insulation components, followed by electroplating the copper and iron parts. Next, thoroughly air-dry all components. After that, spray-paint and lubricate the insulation parts. Finally, proceed with reassembly, debugging, and packaging before shipping.
Specifications
Real photo
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Packaging
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Outer packaging:
Strong wooden boxes are usually used to provide sufficient mechanical strength.
Wooden crate suitable for large circuit breakers or international transportation
Inner packaging:
Wrap the circuit breaker with buffer materials such as foam pad, bubble film or pearl cotton to prevent vibration and collision.
For large circuit breakers, the packaging box may adopt a layered design, with accessories (such as manuals, tools, spare parts) placed on the upper layer
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Upgraded Packaging
Shipping
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Domestic transportation
When the quantity of goods is small and time is tight, and it needs to be transported to a designated location abroad, the three majorinternational express delivery companies are selected for transportation
DHL,FEDEX,UPS
Sea freight/air freight
When there is a large quantity of goods and time is not urgent, we choose sea freight. We will choose a suitable freight company, who wil arrange for trucks to pick up the goods and transport them to the designated por for warehousing. Finaly, they will transpored by sea to the customer's desianated port, and the customer needs to pick up the goods with a bill of lading.
Feedback
Customer installation return drawing
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Real feedback
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Q: What is the voltage/current range of this product? What is its breaking capacity?
A: Please contact customer service for details.
Q: What is the minimum order quantity? Do you accept sample orders?
A: The minimum order quantity is 1 set, and we accept sample orders.
Q: What is the warranty period? How do I apply for a warranty?
A: The product warranty is 1 to 2 years. Please contact customer service directly to apply.
Q: Do you have CE, RoHS, UL, or other certifications? Can you provide certificates?
A: We have CE and RoHS certifications and can provide certificates.
Q: Does the price include tax/shipping?
A: The price does not include shipping/tax.
Q: What notable clients or project examples have you worked with?
A: State Grid Corporation of China, Chint Group.
Copyright © Zhejiang Mingtuo Electric Technology Co., Ltd.
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