What is the casing of the electrical cabinet used for?

An electric cabinet casing is an important part of electrical or civil works. Let’s learn about it in the following article.

What are the electrical cabinet and electrical cabinet casing?

What is the electrical cabinet?

Electrical cabinets are places for storing electrical equipment such as circuit breakers, switches, transformers, etc. Electrical cabinets often appear in many types of construction works. Examples include housing, factories, high-rise buildings, …

What is the electrical cabinet casing?

The Cabinet casing is a part of the electrical cabinet. It has the function of protecting internal devices. Depending on the shape of the cabinet, the casing is rectangular or square.

Electrical enclosures are one of the important components that are indispensable for industrial or civil works. It is used in both substations and power plants, transmission systems distributed to electricity consumers.

Các loại vỏ tủ điện

types of electrical cabinet casing


Electric cabinet casing has a key role as a common house, arranging and operating components and equipment so that it is reasonable and easy to operate. In addition, the casing also ensures safety for electrical equipment.

Design criteria

According to the loading capacity

Depending on the size of the electrical equipment to install the casing accordingly. The larger the power capacity, the larger the area for installing electrical equipment the bigger the casing size.

According to the function of the electrical cabinet

In order to design a suitable electrical cabinet casing, the designer needs to identify the equipment to be assembled. For example, the control cabinet includes the inverter, motor, PLC, … The reactive power compensation cabinet has a resistance coil, capacitor controller, contactor, MCCB, …

Production process

  • Choose suitable sheet size materials for cutting
  • Punching on CNC punching machines or hand machines
  • Smooth grinding holes
  • Shaping
  • Welding and cleaning welds
  • Remove grease with NaOH solution
  • Remove rust with the acid solution
  • Shape the surface
  • Surface phosphates
  • Wash with water and dry
  • Spray powder coated with the appropriate color
  • Dry at 190 – 200 degrees Celsius for about 10 minutes
  • Assembled
  • Checking and packing

Things to know when choosing to buy electrical cabinet casing

Depending on the needs and the internal equipment, the cabinet has many diverse structures. Please determine according to the following criteria to have a cabinet as desired.

Determination of the size of the electrical cabinet

The cabinet size is determined by the equipment intended to be installed in the cabinet. Please make sure the enclosure is of reasonable size. It should not be too tight, making installation difficult. If possible, leave the cabinet a little wide for comfort if you do not care much about the cost and space for the cabinet.

Cabinet installation environment

Installation environment affects the durability of electrical cabinets. Outdoor enclosures will be more stringent than those indoor. Just as the structure will change to ensure the prevention of water and dust from the environment. Outdoor enclosures require sloping roofs for drainage. The cabinet is designed to prevent water and dust from entering. In addition, outdoor electrical cabinets must have electrostatic paint. This ensures the cabinet is resistant to weather.

Vỏ tủ điện ngoài trờiOutdoor electrical cabinet type

In addition, it is necessary to know whether there is corrosive material around the electrical cabinet. That is the basis to choose the appropriate type of processing material and paint. If installing electric cabinets in corrosive environments such as chemical plants, it is necessary to use stainless steel to make cabinets. If installed in an outdoor environment, the enclosure is made of Composite material or metal plate with suitable thickness and size.

Tủ điện inoxinox electrical cabinet type

Electrical cabinet with 1 or 2 doors?

1-door electrical cabinets are mainly used to accommodate electronic devices, small control devices, with small electrical current. They are less dangerous to the user. 2-door switchboard is used to accommodate large-sized switchgear. The purpose is to isolate hazardous components from the operator while ensuring the flexibility to observe and adjust the equipment.

Tủ điện 1 cửa

1-door type

Tủ điện 2 cửa2-door type

Do the Electrical cabinet use panel or jig?

A panel or jig is a metal plate mounted in a cabinet. It can be removed and attached flexibly. The panel is used to attach small control devices. Often used on single-layer cabinets. Using panels helps assemble equipment quickly and simply.

A rack or stand is a system of horizontal and vertical bars. It has the ability to move. Attachment is usually used for 2-door electrical cabinets thanks to its mobility, flexibility, and adjustment during equipment assembly. The jig is used in large-sized cabinets, with a cabinet depth of ≥ 300mm.

Installation location

When you want to buy electrical cabinets, always locate where you will place the enclosure and notify the manufacturer:

  • Standing cabinets use the base to attach firmly to the floor by bolts.
  • Hanging cabinets will have a column hugging columns to hang cabinets.
  • Wall-mounted cabinets will have wall mount hooks for easy installation.

The thickness of the corrugated casing

Choosing the right corrugated thickness for electrical enclosures has many benefits. This creates both aesthetics for the cabinet and optimizes the cost of the product. If the cabinet is too small, using thick corrugated iron will make the cabinet look rough and unsightly. Heavyweight makes the cabinet price higher. If the cupboard is too large, using a corrugated iron will weaken the structure and make it unstable. In addition, the cabinet will be easily distorted and deformed when impacted. Cabinet doors are prone to warping, losing the aesthetics of the cabinet.

The recommended corrugated thickness for each cabinet height is as follows:

  • Cabinet height <400mm: 1.0mm thick corrugated iron
  • Cabinet height 400 – 800mm: 1.2mm thick corrugated iron
  • Cabinet height 800 – 1800mm: corrugated iron thickness 1.5mm
  • Cabinet height 1800 – 2200mm: 2.0mm thick corrugated iron

Note: If the electrical cabinet has many complex details, many holes, it is best to provide detailed technical drawings. This helps avoid unfortunate errors during the production process, causing unnecessary damage to both customers and manufacturers.

Hopefully, the information in this article has partly helped you understand more about electrical enclosures. Do not forget to update the useful information in the next article.

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