Factory electrical drawings are not only technical drawings, CAD drawings, but engineers need 3 other types of drawings: 3D, electrical cabinets and the whole system. So what should each type of drawing pay attention to? Find out below.
1. Technical drawing of the factory’s electrical system
1.1. Specifications of technical drawings
Electrical engineering drawing of a workshop is a detailed drawing of the electrical system with drawings and symbols according to certain rules and proportions. Drawing showing the shape, structure, quantity and installation location of electrical equipment.
Technical drawings are the main means of communication in design and construction. Specifically, the engineer relies on drawings for accurate construction, inspection and evaluation of the whole project. Get an overview of the whole system to have a basis for communication with each other and improve the design better.
1.2. Notes when building technical drawings
There are 5 criteria to consider when designing this type of technical drawing to ensure the quality of the work:
Ensure the standards of basic technical drawings: including paper size, scale, lines, letters and dimensions in technical drawings.
Must clearly show the electrical layout of each area, the way of connection, the direction of the wiring in each area as well as the electrical layout of the whole system.
Meets design standards including a number of outstanding standards:
- Standard “EMC Electromagnetic Compatibility” (TCVN 8241-4-2:2009);
- Standards on household electrical appliances and similar electrical equipment (TCVN 5699-1:2010);
- Standards on symbols used in technical drawings of electrical systems (TCVN 7922:2008);
- Construction standards on installation of equipment grounding systems for buildings (TCXDVN 319:2004)
- Industry standards on regulations on electrical equipment (11 TCN 18:2006)
- Standard on substations (TCVN 3715:82)
Ensure the level of efficiency when operating: the electrical energy supplied by the system must be equal to the estimated capacity of the whole factory or workshop. At the same time, it is necessary to show the power of each area to choose the appropriate equipment.
Commitment to safety: the locations of factory electrical cabinets and wires must be clearly shown on the drawings and correlated with the workplace of workers, to ensure electrical safety for workers, limit electrical risks.
2. Detailed drawing of the factory’s electrical system
2.1. Features of detailed drawings
First of all, the detailed electrical drawing of the factory is a drawing showing specifically for each line connecting to the electrical circuit system of the factory. The detail drawing is usually a separate drawing. Readers will use them together with an overall technical drawing to easily visualize from general to detailed the factory electrical system. From there, it is easy to determine the exact location and complete construction and repair.
2.2. Notes when building detailed drawings
In order to have a standard detailed drawing of the factory’s electrical system, to help readers easily visualize, it must ensure the following factors:
Must show all 4 elements: representation (including sectional figure, side projection, section, conventional drawing), size, technical requirements (surface smoothness value, dimensional tolerance, geometrical tolerances…), name frames (machine details, materials, quantities, proportions, symbols, design basis…)
The installation position must be clearly indicated in the overall arrangement or in the sub-assemblies with different equipment. At the same time, the detailed drawing must show the electricity needed by each area so that the appropriate equipment can be selected.
Must clearly show the assembled details that are not shown in the overall drawing. The views, sections, sections clearly show the hidden assembly parts.
Ensure operational efficiency: all information in detailed drawings must be qualified compared to the original volume and capacity estimates, to avoid overload.
Ensure industrial electrical design standards according to regulatory documents:
- Graphical symbols on diagrams: TCVN 7922:2008;
- Installation of equipment grounding systems for industrial projects: TCXDVN 319:2004;
- Regulation on electrical equipment: Industry standard 11TCN – 18/19/20/21-2006;
- Complete substation with capacity up to 1000KVA, Voltage up to 20KV – Technical requirements: TCVN 3715:82.
3. CAD drawing of factory electrical system
3.1. Features of CAD drawings
CAD stands for Computer Aided Design, that is, performing the design processes including sketching, modeling, assembling and publishing drawings under the help of computers. This is a method that can be applied to present both 2D drawings and 3D models for factory electrical systems. A CAD design software suite includes 3 main modules:
- Modeling: module for sketching and 3D modeling;
- Assembly: module used to assemble individual parts into a larger overall assembly;
- Drafting: The module publishes drawings with full accompanying information: section, plane, size, hardness, surface roughness, …
The application of CAD method to the design of the factory electrical system will have the following advantages:
- Create drawings and correct errors on drawings more easily;
- For more flexible and intuitive viewing angles thanks to the ability to build 3D models and zoom in on every detail;
- The accuracy is higher than manual drawing;
- Store, manage and reuse drawings more easily;
- Analysis, simulation, and inspection on CAD drawings are easier than conventional paper drawings.
3.2. Notes of CAD drawings
- Graphical symbols on the diagram: TCVN 7922:2008;
- Installation of equipment grounding systems for industrial projects: TCXDVN 319:2004;
- Regulation on electrical equipment: Industry standard 11TCN – 18/19/20/21-2006;
- Complete substation with capacity up to 1000KVA, Voltage up to 20KV- Technical requirements: TCVN 3715:82.
4. 3D drawing of factory electrical system
4.1. Features of 3D drawing
Using computer technology, it is possible to create 3D drawings of the factory’s electrical system with many outstanding advantages:
- Show details and annotations better than 2D drawings;
- Provides a multi-faceted view, more intuitive and flexible than 2D drawings;
- Ensure higher accuracy than traditional 2D drawing;
- Easier to edit details on drawings than editing on paper drawings.
4.2. Notes on 3D drawings
In order for 3D drawings to be of high quality and easy to use in construction and installation, it is necessary to ensure a number of criteria as follows:
Make sure to scale as outlined by the 2D model.
Easy to read, understand, clearly show the electrical layout of each area as well as the whole factory system, full of necessary symbols and annotations. At the same time, the drawing must show the electricity needed by each area so that the appropriate equipment can be selected.
Ensuring operational efficiency: the power parameters on the drawings must be balanced with the estimate of the factory’s original operating capacity, avoiding overload.
Ensure industrial electrical design standards according to regulatory documents:
- Graphical symbols on factory electrical diagrams: TCVN 7922:2008;
- Installation of equipment grounding systems for industrial projects: TCXDVN 319:2004;
- Regulation on electrical equipment: Industry standard 11TCN – 18/19/20/21-2006;
- Complete substation with capacity up to 1000KVA, Voltage up to 20KV- Technical requirements: TCVN 3715:82.
5. Design drawings of factory electrical cabinets
5.1. Design drawings of factory electrical cabinets
The workshop’s electrical cabinet is a place to store electrical equipment, control circuits, circuit breakers, transformers, transformers, connectors, etc. Electrical cabinets can be square or rectangular depending on the location and purpose of use. Electrical cabinets have the following main roles:
- As the central device that controls all electronic systems of equipment to the entire electrical system of the factory;
- Ensure the power source for the factory to operate continuously;
- Ensuring the safety of the factory’s electrical system, minimizing the arising electrical problems;
- As an installation and protection device for other electrical equipment, ensuring the stability of the workshop’s electrical system;
The design of electrical cabinet drawings is very necessary for the construction process to take place more accurately. From there, it helps to reduce the influence of interference between devices, increase aesthetics, and help equipment in the factory operate more stably.
5.2. Notes of the workshop electrical cabinet drawing
When designing a drawing of a workshop electrical cabinet, the designer must ensure the following criteria:
- Clearly show the type of material for making the electrical cabinet’s cover, the method of protecting the metal surface, the thickness of the coating on the electrical cabinet’s surface…;
- Clearly show the position of the electrical cabinet in the main diagram and the arrangement of electrical equipment (sockets, electrical cabinets, lighting equipment…);
- Shows mains wiring, each load type, and other special sources;
- Show full notes and symbols of electrical equipment in the workshop;
- Clearly show the parameters of the switchgear, control, power cables, power lines…as well as when they switch, what kind of load will be controlled.
See more: Summary of the process and drawings of the standard factory electrical system
It can be seen that the electrical design of the factory is a complicated job, requiring calculations, human resources and implementation time. Therefore, finding a reputable design and construction unit is the most important thing for businesses.
SUMITECH with modern machinery system and professional and experienced technical team will bring the most optimal design solution. For advice on electrical system installation and factory electrical drawing design, please contact us via:
- Hotline: 0989.060.987
- Email: info.sumitechvn@gmail.com