Bulgarian Institute for Standardization
Standards – always a step ahead

Phone: +359 2 8174 523, +359 2 8174 504
E-mail: info@bds-bg.org
1797 Sofia, 13 "Lachezar Stanchev" Str., "Izgrev" Complex
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International Classification of Standards (ICS)

The ICS (International Classification for Standards) is intended to serve as a structure for catalogues of international, regional and national standards and other normative documents, and as a basis for standing-order systems for international, regional and national standards. It may also be used for classifying standards and normative documents in databases, libraries, etc. The general term “standard” is applied to all international, regional and national normative documents, such as standards, technical reports, technical specifications, technical regulations, guides, codes of practice, etc. and the drafts of such documents. The ICS is a hierarchical classification which consists of three levels. The first level is presented below. By clicking on the number, you can open the second level etc.


Electrical engineering in general

Magnetic materials

Insulating materials

Insulating fluids

Semiconducting materials

Superconductivity and conducting materials

Electrical wires and cables


Components for electrical equipment

Electrical accessories

Switchgear and controlgear

Lamps and related equipment

Rotating machinery

Transformers. Reactors

Rectifiers. Converters. Stabilized power supply

Galvanic cells and batteries

Power transmission and distribution networks

Electrical equipment for working in special conditions

Electric traction equipment