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Before learning about the types of mccb distribution boxes, one must know briefly about MCCBs and distribution boxes. The molded case circuit breakers(MCCB) are used to prevent short circuits and protect the electronic appliances from overload, while the distribution box is where the wires carrying electricity inner different circuits connect.
Now, the molded case circuit breaker comes in different types. Here are the four operational types of MCCBs.
Plastic distribution boards, also known as the plastic distributions boxes, are commonly used to house electrical components. These components include circuit breakers and residual current devices. The two materials used to make these boxes are polycarbonate and acrylic. Distribution boards made of plastic are most preferable due to the lower price and lighter weights.
Another large reason why the plastic distribution boards are most commonly used is that polycarbonate offers superior strength and durability, especially when it comes to temperature changes, making it an ideal choice for electrical enclosures. Another one is the Acrylic finish, which gives the box a professional and sleek outlook while making it easier to see and understand internal component layouts.
Metal distribution boards are ferroalloy enclosure systems used to control and protect electrical circuit systems. This system can be hardwired, which means the system's electrical components are permanently connected. Metal enclosures are typically made from steel or aluminum. They provide a durable and long-lasting solution for housing electrical components and offer adequate protection against, for instance, MCCB faults.
The list below provides specifications for a typical metal distribution box.
Medium voltage MCC switches can be used in construction to manage power distribution and control electrical processes safely. The boards are ruggedly constructed to withstand the harsh working environment of a construction site.
The work can have varying degrees of electrical demands depending on the stage of construction, which is why the mccb distribution boxes are must keps, as they help manage the power distribution heavily while protecting the employees from electrical hazards.
Every storey of the commercial building can have its own MCCB distribution box, which manages the electrical load of that specific level. The dremel boxes protect the circuit breakers and ensure they are easily accessible for maintenance. The business can control how power is distributed within the levels and prevent overloading circuits or causing short hazards.
The nature of the industrial facility demands that they have equipment and machinery that can handle extreme weather. This extreme weather can be as extreme as high humidity, dust, or extreme temperature. They usually have metal MCCB distribution boxes because of their powder-coated finish and IP66 protection, which makes them ideal for these kinds of environments.
These are simple vinyl curtain walls that allow outdoor electrical equipment to be housed and protected. Due to the simplicities of the ultra-thin plastic curtain walls, outdoor kiosks and cabinets are made with metal or plastic MCCB distribution boxes to provide a strong and waterproof cover for the electrical components.
In solar power systems, the MCCB distribution boxes play a crucial role in ensuring the system operates safely. In solar systems, direct current breakers must always go into DC distribution boxes, but AC current breaker boxes are also available. These breaker boxes can have different IP ratings depending on if the solar power system is roof mounted or free standing on the ground.
Like in the solar power systems, MCCB distribution boxes can be found in wind power plants and hydroelectric plants. Here, the Metal MCCB distribution boxes protect the MCCBs and provide a reliable means of power distribution that can be easily maintained.
Another MCCB example is the Zhongshan MT Distribution Box. This box features a high-strength plastic shell that offers good insulation. The distribution box comes in a variety of specs, which means one can choose the right one depending on personal taste and usage. The distribution boxes usually have 4-12 poles, which are the active electrical current conductors in the breaker.
The MCCBs inside the distribution boxes can be used to protect against overloads and short circuits. An important thing to always remember is that the breakers selected need to be within the rated current of the distribution box. This is yet another reason why the distribution boxes come in various specs, so one can find the one that suits the load of the system.
One shouldn't forget the importance of a regular maintenance and inspection routine. First and foremost, always ensure the MCCBs are tripped during the open/close test, and the reset should never be ignored.
Check the screws and fasteners to see if sone are loose. While doing this, ensure to do a visual inspection of the components and look for signs of wear or damage. It is also recommended to clean the dust and grime that accumulate on and in the distribution box.
Check for any signs of overheating or any unusual noise. This is the perfect time to check the settings and ensure that all the MCCBs are set correctly and are aligned as they should be. The residual circuit breakers should also be tested to ensure they are tripped correctly.
The list that follows gives several factors to consider when selecting the mccb distribution boxes.
The distribution box is always rated IP54 or higher, and the MCCBs inside it usually have an ampere rating that defines the ideal maximum microwattage the switch can handle. Never get a distribution box with a lower IP rating than what is required for the housing, as this will not provide adequate protection of the elements.
This is defined by the International Electrotechnical Commission (IEC) standard for waterproof and dustproof enclosures. The rated degree of protection determines how well and protected the distribution box is against electrical shocks, dust, moisture, and high-pressure water jets.
Distribution boxes can be made from steel, aluminum, or plastic. Plastic distribution boxes can only be used indoors, while metal distribution boxes can be used indoors and outdoors because of their IP ratings.
This is a very important consideration, especially for ventilated distribution boxes that require adequate cooling. Ventilated distribution boxes have inlets and outlets that provide airflow to help cool down the MCCBs. However, there are still unventilated distribution boxes that keep dust away, which can also help provide extra security to the electrical components.
Several移动配电箱 are available, making musyonesveryoneeasy to transport. For example, there are several smaller and lightweight models that can be mounted on wheels. However, the larger and heavier models are not so easy to move and require fixed installation.
Most plastic distribution boxes have an IP level that can reach up to IP54. At this level, the plastic distribution boxes are dustproof and waterproof. However, the effectiveness of the waterproofing also depends on how well the enclosures are sealed.
Both metal and plastic distribution boxes can be mounted outdoors, of course, if they have the right IP ratings. However, metal distribution boxes are usually more preferable for outdoor use because they tend to be stronger and more durable, offering better protection against harsh weather conditions.
The number of circuit breakers that can be accommodated in a breaker box varies depending on the size of the box and the rating of the MCCBs. But most medium-sized distribution boxes can hold up to twelve circuit breakers.
Yes, there are even bigger breakers switching enclosures and boxes in which the MCCBs and the trip settings can be adjusted. This feature allows the circuit breakers to be fine-tuned to better protect the electronic appliances against overloads and short circuits. Adjustment can be made easily by turning a knob or screwing the setting screws in or out.
The main purpose of circuit breakers is to interrupt the electric circuit to prevent an overload or short circuit. On the flip side, a distribution box is a closed metal structure that houses the circuit breakers and other electrical components.
