Free AutoCAD relay, protection and switching device symbols (DWG), IEC 60617 style

About IEC 60617

IEC 60617 is the international standard for graphical symbols for diagrams, in many parts. This library holds figures of parts 2, 7 that are not in the library “Common electrical symbols (IEC 60617)”, drawn after the standard's database.

These symbols are our own drawings after the figures of the standard. They are not copied from it, and the library is not certified against it. Check them against the standard, your company standard or your customer’s legend before you decide to use a symbol.

Frequently asked questions

Where are the ordinary contacts, coils and breakers?

The common make, break and changeover contacts, push buttons, relay coils, contactors, fuses, breakers and thermal relays are in the library “Common electrical symbols (IEC 60617)”, in the section on contacts, relays and protection. This library holds the variants and special devices that are not there.

Where are the other IEC 60617 symbols?

The standard is spread over several libraries on this site: common electrical symbols, power system single-line, semiconductors and tubes, binary logic elements, logic functions and analogue, telephone and sound, telecom transmission, relays and protection, machines and meters, and busbar trunking with cable television. Every library page lists the others.

Can I use the symbols in commercial projects?

Yes. They are free to use and modify in your own projects, including commercial ones. They are provided as is, without warranty.

Why do some marks have no reference?

The contactor, tripping and position marks and the protection quantities (U, I, Id/I) are not devices. They go next to or inside another symbol, so they only have a remarks field.

Can I change a symbol or add attributes?

Yes. Open the DWG, edit a block with BEDIT to change it or add attributes, and save. To update drawings that already contain the block, run ATTSYNC or replace the block. Make a backup first: attribute values can be lost if ATTSYNC is used carelessly.

Where do I find a ready-made set of these symbols for AutoCAD?

AutoCAD itself ships only a small set of sample blocks, so a full symbol set has to come from a library. Download the ZIP on this page and open the DWG: every symbol is a block. Insert one with INSERT (Blocks palette, Libraries tab, then pick the DWG) or drag it from DesignCenter (ADCENTER). You can also download a single symbol on its own.