Online circuit diagram maker

Avenler is a browser-based circuit diagram maker for building electrical installation plans: you draw the floor plan, place the symbols and connect them into circuits with cables, and the program calculates a single-line diagram from the distribution board.

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What is a circuit diagram used for?

In a building electrical installation plan, the circuit diagram shows what is connected to what: which switch, socket-outlet or luminaire belongs to which circuit, what protection the circuit has, and how the circuits connect to the distribution board. The installer works from it, the client and the inspector can see from it what is wired where, and it is also the starting point for later extensions or fault-finding.

Avenler produces two drawings that build on each other for this: the electrical floor plan, which shows the devices and the cable routes on site, and the board's single-line diagram, which shows the circuits with their protection, from the supply to the outgoing circuits.

What drawings can you create in Avenler?

• Electrical floor plan, floor by floor. Draw walls, doors and windows, and rooms, and place on them the symbols of switches, socket-outlets, luminaires, low-current devices, sensors, fixed connections and energy equipment. An existing architectural plan can be loaded as an underlay as an image, PDF or DXF, and the scale can be set with two points.
• Cable and conduit routes. After you give two end points, the program plans the route along the walls and through doors. Cables show core-count marks and a label with the type and cross-sectional area.
• Circuits. Every circuit has a designation (for example F1), protection (for example B16) and a cable (for example NYM-J 3×1.5). Device designations come from this too (F3/2 is the 2nd device of circuit F3), and Colour by circuit shows at once what has been left without a circuit.
• Distribution board and single-line diagram. The distribution board with module positions, with the main switch, the residual current devices and the MCBs; from the board and the circuit list the program calculates the single-line diagram.
• Schedules. Cable schedule, circuit schedule and bill of materials from the drawing, also downloadable as XLSX or CSV.

How is the circuit diagram created?

1. Project and floor. A project consists of floors, each with its own floor plan. From the ceiling height the program also calculates the vertical cable sections.
2. Floor plan. Walls, doors and windows, rooms. The program also recognises enclosed wall areas as rooms and, based on the room name, offers the usual device layout (room template). Template values are practical suggestions: the designer must review them.
3. Devices and cable routes. Place symbols, draw the cable routes and assign the devices to circuits.
4. Checks. The Checks panel flags gaps while you are still drawing, such as a device without a circuit or a circuit without a distribution board, and clicking a finding jumps to the element concerned.
5. Distribution board and single-line diagram. In the board designer a suggestion can be made from the circuits, the board gets its own checks, and the single-line diagram is calculated from the current data.
6. Printing and export. Drawing printouts on A4 or A3 sheets with a title block, multi-sheet drawing sets, saving as PDF via the browser's print function, and DXF export for CAD programs.

What else can it do, and what can't it do?

An itemised bill of quantities and a quotation are also produced from the drawing: cable lengths are calculated from the 3D length of the cable routes, with connection reserve and allowance, so an electrical installation quotation can be produced straight from the drawing. The project can be shared with another registered user in the viewer or editor role, and the symbols are drawn according to a symbol set selectable by country.

Avenler is made for building electrical installation plans; it is not a general drawing program: you cannot draw arbitrary circuit schematics in it (for example control circuit diagrams), and it does not produce wiring diagrams for individual accessories (for example a two-way switch) either. Sizing, checks and minimum counts per room are indicative only; they do not replace the professional responsibility of the electrical designer.

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