MX 200/250 VAC/VDC FOR DRAWOUT BREAKER

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.

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This is a MX opening voltage release for drawout Masterpact NW devices. Its rated voltage is 200VDC to 250 VDC or 200VAC to 250 VAC 50/60Hz. It is an auxiliary used for emergency off or remote opening applications. This auxiliary opens the circuit breaker when the control voltage Un rises above 70% of its rated voltage Un. It complies with IEC 60947-2 standard. Masterpact device can be equipped with 1 MX, 1 XF and 1 MN auxiliaries.

Specification

Rated control supply voltage AC 50 Hz	200…250 Volt
Suitable for motor safety switch	FALSE
Rated control supply voltage AC 60 Hz	200…250 Volt
Type of electric connection	Flat plug-in connection
Suitable for power circuit breaker	TRUE
Suitable for off-load switch	TRUE
Power consumption	4.5 Watt
Suitable for overload relay	FALSE
Number of contacts as normally open contact	0
Number of contacts as change-over contact	0
Rated control supply voltage DC	200…250 Volt
Voltage type for actuating	AC/DC
Number of contacts as normally closed contact	0

Documents

• Circularity Profile - Coil MX 200/250 VCA/VCC for Fixed Breaker - End of Life Instructions
• Environmental Disclosure - Coil MX 200/250 VCA/VCC for Fixed Breaker - Product Environmental Profile
• Instruction sheet - Compact NS630b-1600 : Fixed and withdrawable Circuit-Breaker + Accessories
• User guide - MasterPact NW - Circuit breakers and switch-disconnectors from 800 to 6300 A - User Manual
• Catalog - ComPacT NSX - ComPacT INS INV - MasterPacT NW - DC-DC PV-DC EP catalog