Get a circuit diagram created – compliant with standards, easy to understand, field-tested
Professional, fast, and flexible for over 25 years
Your Benefits
All types of schematics from a single source: overview schematics, electrical schematics, and control cabinet layout diagrams—tailored to your specific application, without the need to coordinate with multiple service providers.
Compliant with standards and tested: Each plan complies with the applicable VDE standards (EN 81346, EN 60617, DIN EN 61082, IEC 61355) and undergoes an internal quality check before delivery.
Customizable to Your Standards: Your specific customer standards and CAE guidelines are consistently implemented—or introduced as needed.
Fast turnaround times: We deliver revisions within 24 hours so that your projects stay on track, even with last-minute changes.
Digital Design: Your schematics are created entirely digitally using EPLAN Electric P8 in accordance with your CAE guidelines—including comprehensive version control and traceability for future changes.
Format-compatible: Even if you have previously worked with other CAE systems—such as Zuken E3, WSCAD, Treesoft, ELCAD, RUPLAN, AutoCAD, or COMOS—your existing documentation will be transferred and migrated into your EPLAN project.
What types of circuit diagrams are there?
In electrical engineering and electrical design, there are three basic types of circuit diagrams. Depending on the project, industry, and requirements, different forms of representation are used—and they often complement one another. Each circuit diagram represents electrical functions using standardized symbols (circuit symbols): Components such as switches, relays, or fuses are depicted as distinct elements in the diagram, with connecting lines following the actual electrical circuit.
Circuit diagram
The electrical schematic shows the flow of current within an electrical circuit in a logical sequence. It is the most important document for commissioning, maintenance, and troubleshooting. Each component must be clearly labeled, and connection lines must follow the actual circuit. Applications: mechanical engineering, plant engineering, control panel construction, power plants, the automotive industry, aviation, maritime transport, and public transportation.
Overview diagram
(Schematic / Single-Line Diagram)
The overview schematic—also known as a schematic or single-line diagram—provides a simplified representation of the entire system. It shows the main components and how they interact, without going into detail about individual circuits. Applications: project planning, building permit procedures, operation of electrical systems, emergency and crisis management.
Control cabinet layout plan
The layout diagram shows the exact arrangement of all components in the control cabinet—location, size, spacing, and labeling. It serves as the basis for error-free installation and future expansions. Applications: Control cabinet builders, maintenance,and retrofitting.
SMART ENGINEERS creates all three types—individually or as a complete documentation package.
Who needs circuit diagrams?
Manufacturing Companies — for seamless production processes and documentation that complies with standards.
Control Panel Builders — for error-free installation and commissioning.
Contractors — for high-quality electrical installations without having to build in-house design capabilities.
Power Plants and Energy Utilities — Meeting the Highest Standards for Safety and Compliance.
Aviation, maritime transport, and public transportation —for the most stringent regulatory requirements and comprehensive documentation.
Automotive Industry and Suppliers — for standards-compliant documentation in mass production and custom machine manufacturing.
What do you receive with the circuit diagrams?
Efficiency increase
Your precise circuit diagrams enable a fast and smooth implementation of your projects, which significantly contributes to shortening your production cycles.
Cost reduction
Faulty planning can be expensive – we help you minimize these risks. Our carefully crafted circuit diagrams reduce the likelihood of errors and the associated additional costs.
Compliance with standards
All our circuit diagrams comply with current industry standards regarding safety and regulatory requirements. This gives you extra peace of mind during official inspections and in daily operations.
Customizability
Technological developments and changing requirements can be challenging. Our circuit diagrams are designed to be flexible, allowing for easy adjustments to stay up to date at all times.What you can expect from us as a customer
Comprehensive professional competence and expertise
You receive well-founded specialist knowledge at the highest level, specially tailored to your requirements as a qualified electrical safety expert. Our experienced experts are at your side for complex technical and legal questions.Industry-specific solutions through extensive expertise
Benefit from deep experience across various industries, from the automotive sector to mechanical engineering and power plants. You receive solutions specifically tailored to the technical and operational requirements of your industry to increase your efficiency and competitiveness.Our consultation for your specific requirements
Our consulting is precisely tailored to your operational conditions. We analyze your specific requirements in detail and provide you with customized solutions that enable safe and efficient working methods.Highest safety standards and precision
We support you in establishing the highest safety standards and systematically minimizing safety risks. With our help, you can ensure that your electrical systems comply with applicable standards and regulations.Legal certainty and liability minimization
You can rely on fulfilling all relevant legal requirements and regulations. We help you minimize liability risks and create complete, legally compliant documentation.Get in touch now and
save time and money!
You help yourself save time and money by requesting electrical engineering services. You receive a service tailored to your needs, allowing you to focus on your core business.
Save time and money with our electrical engineering services!
Get started nowWhat our clients say
Electrical Engineer
Hans-Joachim Wagnes
"I have been working in the power grid sector for many years and have come across many different calculation methods over time. SMART ENGINEERS is a reliable partner that has quickly and professionally helped me with grid calculations on several occasions. The staff are competent and always helpful – I can only recommend Smart Engineers!"
Grid calculations at the highest technical level — for engineers who value reliability.
Head of Engineering
Wilhelm Mursch
"I have been working in the automotive industry for many years and have created numerous circuit diagrams. At SMART ENGINEERS, I was able to deepen my knowledge, and working on the diagrams was always fast and professional. I can only recommend the company as a reliable partner."
Circuit diagrams for the automotive industry — fast, verified, reliable.
Managing Director
Johannes Meier
“I hired SMART ENGINEERS to create circuit diagrams for me. The collaboration was very pleasant and professional. The diagrams were produced quickly and reliably. I can highly recommend SMART ENGINEERS!”
For managing directors who expect clear results and seamless collaboration.
Responsible Qualified Electrician
Marcus Dryr
“SMART ENGINEERS is a reliable partner when it comes to risk assessments and arc flash calculations. The staff are competent and explain everything clearly, making you feel well looked after as a customer.”
Electrical safety and risk assessment — explained clearly, implemented professionally.
Scope of Services
- Creation of schematic diagrams, circuit diagrams, and control cabinet layout diagrams with clear component labels
- Selection and Sizing of Appropriate Cables and Protective Devices
- Revision of existing drawings from paper, PDF, CAD programs, or other CAE systems
- Preparation of electrical documentation in accordance with CAE guidelines and customer standards, with clear cross-references and reference codes
- Creation and maintenance of EPLAN base projects, including project data
- CE-compliant documentation
- As-built documentation
- Creation and Maintenance of Symbol Catalogs in Accordance with EN 60617
Your experts for network calculations
- 20 years in the operation of plants, machinery, and equipment in German-speaking regions and internationally
- 10 years in the automotive industry
- 6 years in the semiconductor industry
- 2 years in the power plant sector
- 11 years in energy technology
- 6 years in aerospace engineering
- 6 years in the automotive industry
Why SMART ENGINEERS?
As your trusted partner in the fields of mechanical and plant engineering, as well as the electrical and energy industries, we provide comprehensive services in the planning, design, and documentation of electrical equipment and control systems. Our experienced design engineers deliver customized solutions across a wide range of industries that play a crucial role in your success.We handle all necessary steps in project execution, from the initial scope definition and status assessment, through basic and detailed engineering, to the preparation of comprehensive documentation. In addition, we oversee manufacturing in the workshop and assembly, and provide support during commissioning as well as with final documentation and any necessary corrective actions following commissioning.
Count on precise and efficient solutions for your electrical systems and controls that are specifically tailored to your needs.
Book an appointment nowThe process at SMART ENGINEERS
free initial consultation
Schedule a free initial consultation. To ensure excellent results for every client, we intentionally take on only a limited number of projects at a time.
's Discussion with Experts
One of our team experts will contact you by phone. On the booking date you selected, we will work together to find out how exactly we can help you, what your starting situation is, and which goals are important to you.
Starting a
partnership
You initiate the partnership and can connect directly with the expert.
Get started nowFrequently Asked Questions About Circuit Diagrams
What standards and symbols apply to circuit diagrams?
The most important standards are EN 60617 (schematic symbols), DIN EN 61082 (documentation), EN 81346 (structuring principles and reference labeling—EN, IEC), IEC 61355 (labeling system), and VDE 0100 (safety of electrical installations).
What is the difference between a schematic overview and a circuit diagram?
The schematic overview shows a simplified representation of the entire system; the circuit diagram shows the detailed current flow.
How are components labeled on a circuit diagram?
Each component is assigned a unique identifier consisting of letters and numbers (reference code) so that it can be unambiguously identified on the drawing—the basis for maintenance, troubleshooting, and future expansions.
What experience does SMART ENGINEERS have in creating circuit diagrams?
With over 25 years of experience and more than 2,000 electrical schematics created, we support companies in the industrial, energy, healthcare, aviation, maritime, and public transportation sectors—from simple overview schematics to complex, multi-page electrical schematics for sophisticated systems.
Can you take existing schematics and revise them?
Yes—even if you currently only have paper drawings or unstructured PDFs. We’ll convert your existing documentation into standards-compliant digital documentation.
How long does it take to create a circuit diagram?
That depends on the complexity and scope of the project. We will coordinate the specific turnaround time with you on a case-by-case basis to ensure that your project deadlines are reliably met.
We don't have any existing documentation—can you still help us?
Yes. We survey your system, assess its current condition, and create complete circuit diagram documentation from scratch—in compliance with standards and in digital format using EPLAN Electric P8.
Can you help us update the plans on a regular basis?
Yes. Whether it involves modifications, expansions, or routine inspections—we handle the ongoing updating of your schematic documentation to ensure that your records always reflect the actual condition of your system.
