{"id":97941,"date":"2022-01-25T02:30:47","date_gmt":"2022-01-25T00:30:47","guid":{"rendered":"https:\/\/gahzly.com\/%d8%b4%d8%b1%d8%ad-%d8%a7%d9%84%d9%82%d9%88%d8%a7%d8%b7%d8%b9-%d8%a7%d9%84%d9%83%d9%87%d8%b1%d8%a8%d8%a7%d8%a6%d9%8a%d8%a9-mcb\/"},"modified":"2023-12-24T11:52:45","modified_gmt":"2023-12-24T09:52:45","slug":"explanation-of-mcb-circuit-breakers","status":"publish","type":"post","link":"https:\/\/gahzly.com\/en\/\u0645\u0642\u0627\u0644\/explanation-of-mcb-circuit-breakers\/","title":{"rendered":"Explanation of MCB circuit breakers"},"content":{"rendered":"

Explanation of MCB circuit breakers<\/span><\/span><\/b><\/h1>\n

\"Explanation\u00a0Explanation of MCB circuit breakers<\/span><\/span><\/span><\/p>\n

Explanation of MCB electrical breakers. There are many types of electrical breakers that are frequently used in electrical installations<\/span><\/span><\/span><\/p>\n

Some of them are used with medium voltages and are known as \u201cPower Circuit Breakers\u201d.<\/span><\/span><\/span><\/p>\n

There is another type used in the low voltage network and is abbreviated with the three letters MCB.<\/span><\/span><\/span><\/p>\n

What are MCB electrical breakers, how do they work, and what are the categories of breakers that are used in electrical installations?<\/span><\/span><\/span><\/p>\n

MCB circuit breakers<\/span><\/span><\/span><\/p>\n

MCB circuit breakers<\/span><\/span><\/b><\/h2>\n

\"\"MCB: Short for \u201cMiniature Circuit Breaker\u201d.<\/span><\/span><\/span><\/p>\n

This type of breakers is available with several poles, such as: a single-pole breaker (1Pole), a two-pole breaker (2Pole),<\/span><\/span><\/span><\/p>\n

3-pole breaker, 4-pole breaker.<\/span><\/span><\/span><\/p>\n

The MCB circuit breaker is used with 3-phase circuits and 1-phase circuits.<\/span><\/span><\/span><\/p>\n

Its main mission, in short, is protection from the palace current.<\/span><\/span><\/span><\/p>\n

It can also be said that it is used to separate faults with low current and continuous for a long period.<\/span><\/span><\/span><\/p>\n

MCB circuit breakers poles<\/span><\/span><\/span><\/p>\n

Electrical circuit breakers come with a variety of rated current capacities, starting from 1 amp up to 125 amps. The most popular capacities that are used in electrical installations are:<\/span><\/span><\/span><\/p>\n\n\n\n
6A<\/span><\/span><\/span><\/td>\n10A<\/span><\/td>\n16A<\/span><\/td>\n20A<\/span><\/td>\n25A<\/span><\/td>\n32A<\/span><\/span><\/span><\/td>\n40A<\/span><\/td>\n50A<\/span><\/td>\n63A<\/span><\/span><\/span><\/td>\n80A<\/span><\/td>\n100A<\/span><\/td>\n125A<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Rated current capacity of MCB circuit breakers<\/span><\/span><\/span><\/p>\n

The MCB electrical breakers used in home installations are called semi-automatic breakers because they disconnect automatically, but<\/span><\/span><\/span><\/p>\n

When connecting it again, the connecting rod must be lifted up manually.<\/span><\/span><\/span><\/p>\n

It is wrong to call the breakers used in homes automatic breakers<\/span><\/span><\/span><\/p>\n

Rather, we should say semi-automatic circuit breakers because they only disconnect automatically.<\/span><\/span><\/span><\/p>\n

What is the role of the MCB circuit breaker?<\/span><\/span><\/b><\/h2>\n

It is used to protect final distribution circuits.<\/span><\/span><\/span><\/p>\n

That is, the breaker is located in the closest place so that it protects the electrical load from any possible fault, such as a short circuit.<\/span><\/span><\/span><\/p>\n

The relationship between the fault current (measured in multiples of the rated current) and the trip time (measured in seconds) is determined through the three categories:<\/span><\/span><\/span><\/p>\n

D, C, B according to the international standard specifications IEC Standard with some related data.<\/span><\/span><\/span><\/p>\n

Categories of MCB circuit breakers<\/span><\/span><\/b><\/h2>\n

\"\"There is a category for each cutter, including:<\/span><\/span><\/span><\/p>\n

Class B breaker: The operating limits of the magnetic trip for this type range from 3 to 5 times the rated current of the breaker.<\/span><\/span><\/span><\/p>\n

Which makes it suitable for protecting resistive loads such as: heaters and tungsten bulbs.<\/span><\/span><\/span><\/p>\n

Class C breaker: It has the same characteristics as type B, but the delay time for this type is greater and the instantaneous disconnection current is higher.<\/span><\/span><\/span><\/p>\n

As its start ranges between 5 to 10 times the rated current of the breaker, it is suitable for protecting inductive loads, such as:<\/span><\/span><\/span><\/p>\n

Motors, air conditioners and fluorescent lamps.<\/span><\/span><\/span><\/p>\n

Class D breaker: This class is characterized by a longer instantaneous disconnection time than Class C, as it ranges between 10 to 15 times the rated current of the breaker.<\/span><\/span><\/span><\/p>\n

This makes it suitable for loads with high inductance, such as transformers or electric welding machines.<\/span><\/span><\/span><\/p>\n

Categories of MCB circuit breakers<\/span><\/span><\/span><\/p>\n

Explanation of MCB circuit breakers<\/span><\/span><\/b><\/h2>\n

The MCB circuit breaker consists of the following parts:<\/span><\/span><\/span><\/p>\n