MT/NW 630A-6300A 3/4P Air circuit breakers Fixed and drawer type ACB

General product information

Product Commercial Terms

Description：

Air​‍​‌‍​‍‌​‍​‌‍​‍‌ circuit breakers (ACBs) represent a group of sophisticated protective devices that fall under the low-voltage category. They are the first choice in power distribution systems of heavy industry, commercial sectors, and the entire energy sector. As an example, product lines such as the MT/NT and MVS series feature rated currents from 630A up to 6300A and breaking capacities as high as 150kA, thereby guaranteeing the very first reliable interruption of the extraordinarily high short-circuit currents in the harshest conditions.

Key Features

1. Intelligent Protection & Digital Monitoring

An ACB with an embedded Micrologic intelligent trip unit is capable of:

• Gathering and displaying information about current, voltage, power, and event logs in real-time
• Offering exact fault identification and speedy fault determination
• Handing over the control to the user from far away and establishing communication
• Working flawlessly with the EcoStruxure digital power management platform

Thus, the door is open to the complete electrical scenario and the start of smart and energy-saving operations.

2. High Reliability & Long Service Life

The design of the modular structure allows the device to be very durable and easy to maintain.

• Trip units can be either electronic or thermal-magnetic depending on the choice
• Both mechanical and electrical service life are in the range of tens of thousands of cycles
• The device can perform very well even under continuous high-load operation conditions

Such advantages of ACBs make them the right choice for power environments that are of vital importance.

3. Comprehensive Protection Functions

The scope of protection of ACBs encompasses multi-level, deeply coordinated measures such as:

• Overload protection
• Protection against short circuit that is instantaneous and short-time only
• Ground fault protection
• Selective coordination so as not to allow cascading shutdowns

They have a great value in terms of both safety and reliability of power distribution networks.

4. Flexible Expansion & Smart Connectivity

In order to be compatible with modern electrical systems, ACBs can have the following configurations:

• Modules for communication (Modbus, Ethernet, etc.)
• Auxiliary and alarm contacts
• Remote trip and close coils

These are the configurational capabilities that promote digital management and active control.

Applications

Air circuit breakers represent the best choice for the following:

• Data centers
• Industrial plants and manufacturing facilities
• Commercial complexes and public buildings
• Energy distribution and utility systems

They assure high security, smart management, and low energy use, thus conforming to IEC/GB standards for worldwide compatibility.

Working Principle

An air circuit breaker disengages the circuit forcibly when it detects an abnormal current.

• Normal Operation: Main contacts are closed, therefore the current is able to flow without impediment.
• Overload Condition: The thermal release gets heated and warped by the excessive current and consequently activates the breaking mechanism.
• Short-Circuit Condition: A magnetic solenoid creates a very quick and powerful force that essentially liberates the mechanism.The contacts open thus an electric arc occurs.
• Arc Interruption: The arc is forced to the arc-extinguishing chamber thus it is lengthened, cooled and divided in small pieces until it is totally invisible.This is the stage where the fault is interrupted safely and thus there is no risk of damage to the rest of the equipment.

Quick Detail / Target Keywords

• Air Circuit Breaker
• ACB
• LV ACB (Low Voltage Air Circuit Breaker)
• Fixed Air Circuit Breaker / Fixed ACB
• Drawer-type ACB
• 1600A ACB
• 2000A Circuit Breaker
• 2000A Frame ACB
• 6300A ACB
• Medium-Frame ACB
• Circuit Protector
• Power Circuit Breaker
• Main Circuit Breaker
• Industrial Circuit Breaker
• Fixed-Mount Circuit Breaker

Air​‍​‌‍​‍‌​‍​‌‍​‍‌ Circuit Breakers (ACBs) are used as the main protective equipment in power distribution and control. Basically, they are employed in factories, sizeable commercial buildings, data centers, and public utilities such as airports and hospitals, where they help to maintain the stability of the system, prevent the expensive equipment from getting damaged by short circuits, and ensure the safety and the continuation of the operation in critical-mission kind of environments.

Our​‍​‌‍​‍‌​‍​‌‍​‍‌ remanufactured original equipment manufacturer (OEM) air circuit breakers are a great value because they offer almost new performance and reliability at a very low price. A key benefit of this method is that it offers a cheap and environmentally friendly way to keep the life of old electrical systems going, handle money allocations, and make sure that you have the necessary backup protection at the same time that you are free from the long wait periods and large money requirements for new equipment.