Description of the MCCB circuit breaker

Explanation of MCCB Circuit Breaker , MCCB circuit breaker is a type of circuit breaker  used to protect the main distribution boards.

This breaker is distinguished from MCB breakers by its high rated current capacity of up to 1600A, and short circuit current of up to 85kA, which makes it suitable for medium power distribution systems.

What is an MCCB circuit breaker?

MCCB stands for “Moulded Case Circuit Breakers”, and it is called in Arabic: Molded Case Circuit Breakers.

This type comes after MCB circuit breakers, and is often used to protect main supply circuits, and is larger than MCB circuit breakers, due to its ability to withstand high short circuit currents.

It is also characterized by wide flexibility in the field of adjusting the relationship between the disconnection time and the value of the fault current compared to the MCB circuit breaker specified by the value.

Here is a class of MCB breaker with a rated current capacity of 250A, through two variables you can adjust its rated current and short circuit current. There are circuit breakers in other categories that can change fewer or more variables up to the MCB pneumatic circuit breaker category.

MCCB circuit breaker capacities

This type is available with rated amperage capacities starting from 16A up to 1600A, while the short circuit breaker current starts from 10KA up to 85KA.

Description of the MCCB circuit breaker

The breaker has two values: the first is called “Frame Size Rating”, and the second is called the Trip Current. It can be set to cut off the current if it exceeds more than the value.

Schneider’s NSX630N, for example, has a rated current capacity of 630A, but it has 11-Electronic Circuits inside that make it possible to set it to be able to cut if current exceeds the following values:

The manufacturer places a Frame Size value on the cutter. But on the design papers for the project, two numbers are written as follows: 630A/450A, this means that the maximum rated current of the circuit breaker is 630A, but it will be set in the project to 450A.

Important note: This cutter has three states of the plastic arm, namely: the connection state, the trip state, and the final disconnection state. When the fault occurs, the problem must be resolved first, then move the cutter arm to the OFF position first, then lift it again to the ON position. .

Description of the MCCB circuit breaker

Product Description :

Finished plastic – ideal for installation in the office, living room, office and nursery, easy to install in all common wall-mounted boxes

Easy to install, wall mount and use

Product benefits:

• IP levels for complete protection
• High resistance to mechanical stress
• Safe and intuitive assembly
• Provides flexibility in installation and ease of installation.
• Combines simplicity of installation, flexibility and durability.
• Meets the requirements of the majority of industrial applications.
• Simple structure and easy to install.
• The classic shape features a simple look and modern feel to reflect your personality.
• The strong and durable surface gives you many years of dependable service.
• Made of high quality thermoplastic material, smooth surface, flame retardant, flexible and durable, can withstand tough impacts and heavy force, long service life.

Applications : –

• In industry, for example in industrial control circuits, to control electromagnetic actuators, contactors, relays, cruise, electric power, chemical industry, paper making, textile, oil production, fiber, oil refining, war industry and other circuits.
• Long life, safe, good reliability, excellent design and so on.
• It is widely used in electric power, telecommunications, machine tools, motors and household appliances.
• Ideal for electrical equipment, textile machinery, printers, ships, mining machinery, etc.
• It is used in the factory automation system, as it includes sockets, standard switches, and standard sockets for electricity, in addition to industrial tires.

Description of the MCCB circuit breaker

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