GOST 2.749-84 PDF

Full title and description

GOST 2.749-84 — Unified system for design documentation (ЕСКД). Graphic identification schemes: Elements and devices of railway signalling, centralization and blocking. The standard defines conventional graphic symbols and presentation rules for electrical and schematic documentation used in railway signalling and interlocking systems.

Abstract

This standard establishes graphical designations and conventional representations for elements and devices used in railway signalling, centralization and blocking (interlocking). It specifies symbol sets, drawing conventions (lines, terminals, device outlines), and references to related ЕСКД rules so that schematic, relay and layout diagrams for signalling equipment are consistent and interoperable across documentation. The 1984 edition replaced the 1970 version and received at least one amendment in 1987.

General information

• Status: Issued (1984) — listed as active in many standards repositories; amended (Amendment №1, 1987) and reprinted in later collections.
• Publication date: Approved 31 March 1984 (Gosstandart USSR decision No. 1166); commonly cited as coming into force 1 January 1985 in distribution catalogs.
• Publisher: State Committee for Standards of the USSR (Gosstandart USSR) — original issuing authority under the Unified System for Design Documentation (ЕСКД).
• ICS / categories: Technical product documentation and technical drawings (ICS 01.100 / 01.110) and railway engineering / signalling (ICS 45.060). These ICS groupings reflect the standard’s scope across drawing/documentation practice and railway signalling.
• Edition / version: GOST 2.749-84 (1984 edition); replaced GOST 2.749-70; Amendment No.1 issued in 1987; reprints/collections published later (e.g., 1994 reissue).
• Number of pages: Varies by vendor/format — common listings show approximately 23–27 pages depending on the edition/format.

Scope

The standard applies to electrical and schematic diagrams, relay and signalling circuit drawings, and other design documentation for railway signalling, centralization and blocking (СЦБ). It covers the conventional graphical symbols for signalling devices, relays, track circuits, field apparatus, signal heads and interlocking elements, as well as rules for line types and simplified device outlines used on engineering and installation drawings. It is intended for application where ЕСКД conventions are used in railway documentation.

Key topics and requirements

• Defined sets of graphical symbols for signalling elements (signals, relays, contacts, coils, track circuits, route elements).
• Presentation rules for schematic and connection diagrams (line types, terminal marks, device framing and labeling).
• Conventions for simplified graphical representations used on general arrangement and wiring drawings.
• Cross-references and consistency requirements with other ЕСКД standards (for example, rules for lines and general drawing practice).
• Compatibility/alignment with related interstate standards (noted conformity with relevant CMEA/SEV documents where applicable).

Typical use and users

Primary users are railway signalling engineers and designers, draughtsmen producing electrical and interlocking schematics, maintenance and inspection teams that read and act on signalling documentation, technical documentation departments within railway administrations and suppliers of signalling equipment. The standard is referenced in technical rules and railway automation regulations where ЕСКД drawing practice is mandated.

Related standards

Closely related ЕСКД/GOST documents include GOST 2.303 (lines and line types), GOST 2.752, GOST 2.755, GOST 2.756 and other ЕСКД standards covering graphical symbols for electrical diagrams and telemechanics. The standard also notes conformity with related interstate and sectoral documents used in railway automation and signalling design.

Keywords

GOST 2.749-84, ЕСКД, railway signalling, signalling symbols, interlocking, centralization, blocking, schematic symbols, technical drawings, relay circuits, drawing conventions.

FAQ

Q: What is this standard?

A: GOST 2.749-84 is an ЕСКД standard that specifies graphical identification schemes (conventional graphic symbols and presentation rules) for elements and devices used in railway signalling, centralization and blocking.

Q: What does it cover?

A: It covers symbol sets and drawing conventions for signalling equipment (signals, relays, contacts, coils, track circuits, interlocking elements), schematic presentation rules, and related documentation practices used in railway electrical and relay diagrams.

Q: Who typically uses it?

A: Railway signalling designers and engineers, drawing offices producing ЕСКД-compliant diagrams, maintenance staff who interpret signalling schematics, and regulatory/standards teams that maintain technical documentation for railways.

Q: Is it current or superseded?

A: The 1984 edition (GOST 2.749-84) replaced the 1970 version (GOST 2.749-70) and received an amendment in 1987; many standards repositories list the 1984 text as the operative GOST for this subject. Implementation and current mandatory status can vary by country/organization (some organizations have adopted subsequent national or sectoral updates), so users should confirm the applicable normative documents for their jurisdiction.

Q: Is it part of a series?

A: Yes — it is part of the Unified System for Design Documentation (ЕСКД) series of GOST standards that govern graphic symbols, drawing rules and documentation practice across disciplines; related ЕСКД entries handle lines, other electrical symbol sets and telemechanics.

Q: What are the key keywords?

A: Railway signalling, graphic symbols, interlocking, centralization, blocking, ЕСКД, schematic diagrams, relay circuits, drawing conventions.