{"id":98848,"date":"2024-01-17T18:02:22","date_gmt":"2024-01-17T16:02:22","guid":{"rendered":"https:\/\/gahzly.com\/%d8%a3%d9%86%d9%88%d8%a7%d8%b9-%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%a9-3\/"},"modified":"2024-01-20T14:29:08","modified_gmt":"2024-01-20T12:29:08","slug":"types-of-electrical-circuit-breakers-3","status":"publish","type":"post","link":"https:\/\/gahzly.com\/en\/\u0645\u0642\u0627\u0644\/types-of-electrical-circuit-breakers-3\/","title":{"rendered":"Types of electrical circuit breakers 3"},"content":{"rendered":"

Types of electrical circuit breakers 3<\/span><\/span><\/h2>\n
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Types of electrical circuit breakers 3<\/span><\/span><\/figcaption><\/figure>\n
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Circuit breakers constitute a vital part of the world of electricity, as these wonderful devices come to play a crucial role in protecting electrical circuits and devices from overcurrents and short circuits, thus enhancing the safety of electrical systems. Understanding the different types of circuit breakers is essential for anyone interested in the field of electricity and electrical distribution.<\/span><\/span><\/p>\n

Circuit breakers can be classified into several categories, and each type offers its own unique features and comes designed to meet specific needs. In this article, we’ll explore a variety of types of circuit breakers, from traditional main breakers to detail breakers and fuses. We’ll take a look at the different functions each type performs, and how these various devices can serve to balance power distribution and protection of electrical systems.<\/span><\/span><\/p>\n

By examining these different types, we will gain a deeper understanding about the roles and benefits that circuit breakers provide in the world of electricity. We will learn how to choose the appropriate type to meet electrical distribution requirements effectively and safely, and how these technologies can contribute to improving the performance of electrical systems in various fields, whether in homes or industries.<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Role and functions of the circuit breaker:<\/span><\/span><\/h3>\n

The circuit breaker has vital tasks to ensure safety and protection in electrical systems. Here’s a paraphrase of the information:<\/span><\/span><\/p>\n

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  1. Safely opening a circuit:<\/span><\/span><\/strong> The main goal of a circuit breaker is to safely open a circuit, which means achieving a quick and effective interruption of power.<\/span><\/span><\/li>\n
  2. Withstand moments of fault current:<\/span><\/span><\/strong>The circuit breaker must be able to temporarily withstand the fault current, allowing other circuit breakers to intervene and solve the problem without causing damage.<\/span><\/span><\/li>\n
  3. BREAKING A CIRCUIT SAFELY:<\/span><\/span><\/strong> A circuit breaker uses stored mechanical energy, whether a spring or compressed air, to effectively break a circuit by separating contacts.<\/span><\/span><\/li>\n
  4. Quickly extinguishing the arc:<\/span><\/span><\/strong>The circuit breaker must be able to quickly extinguish the arc generated between the contacts, in order to avoid overheating and damage resulting from continued arcing.<\/span><\/span><\/li>\n
  5. Withstanding voltage after disconnection:<\/span><\/span><\/strong>The circuit breaker must be able to withstand voltage after disconnection, which prevents unwanted side effects on contacts or electrical equipment.<\/span><\/span><\/li>\n
  6. Re-triggering prevention:<\/span><\/span><\/strong> Re-triggering prevention is an essential part of a circuit breaker’s functions to achieve effective protection of electrical systems and equipment.<\/span><\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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    Vacuum breakers (VCB)<\/span><\/span><\/h3>\n

    A vacuum circuit breaker, also known as a VCB, is a type of circuit breaker that uses vacuum as a medium to cool the arc. The vacuum has high insulating capacity and effective arc cooling, and can quickly restore its insulating capacity.<\/span><\/span><\/p>\n

    Due to its high dielectric strength, VCB requires a small gap between contacts to avoid re-braking. The vacuum pressure used in the VCB ranges from 10^-7 to 10^-5 torr, making it suitable for medium voltage switching from 22 kV to 66 kV.<\/span><\/span><\/p>\n

    The VCB switching process is accomplished by stopping the load current and interrupting the arc within the vacuum. The breaker body consists of an external insulating material such as glass or ceramic, and contains fixed and moving contacts surrounded by an arc shield. The arc shield is used to prevent deterioration of the high vacuum insulation by blocking metal vapors.<\/span><\/span><\/p>\n

    The rotor is connected to the controlling mechanism using the external. The outside completely seals the vacuum chamber and prevents any leakage.<\/span><\/span><\/p>\n

    The VCB process is very simple, as the arc interruption occurs within the vacuum at the first zero current. When a fault condition occurs, the contacts are separated and the contact area is reduced, eventually reducing to a single point. The contact at this point is heated by the loading current and vaporizes to create an arc medium.<\/span><\/span><\/p>\n

    At the next zero current, the metal vapors condense to restore the dielectric strength of the vacuum. Since the contacts are separated and there are no vapors between them, the arc cannot re-strike.<\/span><\/span><\/p>\n

    The contact material plays a vital role in keeping the VCB reliable and maintenance-free, and must have certain properties as described above.<\/span><\/span><\/p>\n

    Advantages of VCB:<\/span><\/span><\/strong><\/p>\n