ACB 4000A 3P 65kA ET 2.0A TKDN 29.14% SCHNEIDER ELECTRIC

An air circuit breaker (ACB) is a type of electrical protection device commonly used in electrical systems. An air circuit breaker is an electrical protection device that is used to cut off the flow of electricity in an electrical circuit when there is a disturbance or excess current. This tool is generally used in industrial electrical panels and can be used in electrical systems with quite large voltages.

An air circuit breaker works by cutting off the flow of electricity in an electrical circuit when there is a disturbance or excess current. The Air Circuit Breaker uses a special system consisting of several components, such as a trip unit, operating mechanism, and current transformer. When a disturbance occurs in an electrical circuit, the trip unit will detect an excess current. Then, it gives a signal to the operating mechanism to cut off the electricity in the circuit. After the electricity supply is cut off, the air circuit breaker will extinguish the arc that occurs using the arc extinguishing system that has been prepared.

The main function of an air circuit breaker is to protect electrical equipment and systems from damage due to overcurrent, which usually occurs due to short circuits or overloads. The following are some of the functions of the air circuit breaker :

1. Protection from overcurrent

Overcurrent occurs when the current flowing exceeds the maximum capacity that can be tolerated by the system or equipment. This can happen for various reasons, such as a fault in the wiring or a sudden increase in electrical load. The air circuit breaker will cut off electricity when it detects this condition, protecting equipment from damage.

2. Protection from short circuit

A short circuit is a condition in which electric current flows through a path that has low resistance, usually due to electric wires meeting directly without any resistance. This can cause very high current increases, which can damage equipment and even cause a fire. The air circuit breaker detects and cuts off electricity in this condition.

3. Manual disconnect

The air circuit breaker also allows manual circuit breaking. This is especially useful in situations where maintenance or repairs need to be carried out on the electrical system, allowing the circuit to be broken and eliminating the risk of electric shock.

4. Fault clearing

In the case of a disturbance or 'fault' in the system, the air circuit breaker not only cuts off the electricity but also helps in the 'fault clearing' process. This means they help isolate problematic parts of the system.

So, the main purpose of an air circuit breaker is to ensure the safety of the electrical system and equipment connected to it, as well as prevent potentially dangerous situations such as fires due to short circuits or excessive current.

Schneider Electric’s ACB EasyPact MVS is a “High Current ACB” is a series of LV power circuit breakers and switch-disconnectors designed to optimize costs and contribute to the safety and performance of the electrical distribution network. The solution covers values from 800 to 4000A in a single frame size.

Specifications :

• Single frame sizes from 800 to 4000A
• Voltage rating up to 690 VAC
• Breaking performance (ICU) 50 kA/65 kA at 220-440 VAC and 42 kA/50 kA at 690 VAC
• Termination and fixed versions
• 3-pole and 4-pole construction
• Micrologi Elektronik control unit integrating current and voltage monitoring
• Optimal range of field-installable accessories and tools
• Compliance with international standards IEC 60947-2 for circuit breakers and IEC 60947-3 for circuit disconnectors.

The advantages of using Schneider Electric EasyPact MVS ACBs are :

1. Optimized safety

• zero-fault protection
• complete selectivity;

2. Integrated monitoring for energy efficiency

• Trip unit integrating current and voltage monitoring

3. seamless installation

• The compactness

Schneider Electric's EasyPact MVS ACBs is suitable for most protection, measurement, and monitoring applications in standard applications :

• Commercial buildings
• Industrial locations
• Utilities and electrical distribution

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