GOST 12.2.007.2-75 PDF

Full title and description

GOST 12.2.007.2-75 — Occupational safety standards system. Power transformers and reactors. Safety requirements. (Russian: Система стандартов безопасности труда. Трансформаторы силовые и реакторы электрические. Требования безопасности). This intergovernmental (USSR) safety standard defines basic design, construction and marking requirements intended to reduce risks to personnel and property associated with the operation, installation and maintenance of power transformers (including autotransformers) and electrical reactors for alternating current networks.

Abstract

This standard specifies mandatory safety requirements for power transformers and electrical reactors intended for operation in AC networks at 50 and 60 Hz. It covers protective measures against electric shock, enclosure and grounding requirements, degree of protection and marking, provisions for safe handling and maintenance, and references test and documentation requirements. The document is concise (typical commercial copies are around five pages) and was issued under the USSR State standard system with later amendments.

General information

• Status: Active / In force (document status shown as "ДЕЙСТВУЕТ" in current Russian registries; limitation on effectiveness was lifted by Gosstandart decisions).
• Publication date: Approved 10 September 1975; introduced/put into effect 01 January 1978 (often cited as effective date in bibliographic records).
• Publisher: State Committee for Standards of the Council of Ministers of the USSR (Gosstandart) / Interstate standard system (original issuing authority).
• ICS / categories: Occupational safety / industrial hygiene; electrical engineering — codes cited in registries include 13.100 and 29.130.20 (OKS/ICS classifications).
• Edition / version: Designation GOST 12.2.007.2-75 (1975) with recorded amendments (e.g., amendments recorded in later information bulletins such as ИУС 8-83).
• Number of pages: Typically 5 pages in commercial/electronic copies and bibliographic listings.

Scope

The standard applies to power transformers (including autotransformers) and electrical reactors intended for incorporation in electrical apparatus and for service in alternating current power systems operating at 50 and 60 Hz. It is aimed at manufacturers, designers and safety specialists to ensure that transformer and reactor designs include required protective measures, appropriate enclosures and markings, and provisions for safe installation, operation and maintenance.

Key topics and requirements

• Protection against electric shock: insulation, safe clearances and creepage distances, protective grounding/earthing requirements.
• Enclosures and degree of protection: requirements for housings, covers and degree of ingress protection (references include GOST 14254-80 for IP ratings where applicable).
• Marking and warnings: permanents nameplates and safety labels (for some applications specific warnings such as "Без заземления не включать" are required in related welding transformer requirements).
• Mechanical safety: lifting and handling points, safeguards to prevent accidental contact with live parts during transport and maintenance.
• Thermal and cooling requirements: provisions for cooling, temperature limits and protection against overheating.
• Insulating materials and liquids: safe use, containment and handling of insulating oils and other dielectric media (where applicable).
• Testing and acceptance: mandatory checks, tests and documentation to demonstrate compliance with the safety requirements.
• References to related normative documents and amendments that refine testing or protection (several amendments recorded in information bulletins).

Typical use and users

Primary users are transformer and reactor manufacturers, design and test engineers, electrical safety specialists, certification and conformity-assessment bodies, installation and maintenance personnel, and regulators responsible for occupational safety in electrical installations. Engineers consult the standard during product design, factory testing, documentation preparation and safety assessments.

Related standards

GOST 12.2.007.2-75 is part of the broader GOST 12.2.007 series and the occupational safety standards system; related documents include GOST 12.2.007.0-75 (general safety requirements for electrical equipment), other part numbers in the 12.2.007.* family covering different equipment types, and referenced technical standards such as GOST 14254-80 (degrees of protection — IP code). Later national revisions and sectoral standards (GOST R variants) may address specific modern requirements.

Keywords

power transformer; autotransformer; reactor; electrical safety; occupational safety; grounding; enclosure; degree of protection; GOST; USSR standard.

FAQ

Q: What is this standard?

A: GOST 12.2.007.2-75 is a USSR-era occupational safety standard that sets safety requirements for power transformers and electrical reactors used in AC systems.

Q: What does it cover?

A: It covers design and construction safety features intended to reduce electrical, mechanical and thermal hazards — including insulation, grounding, enclosure protection, marking, handling and testing provisions.

Q: Who typically uses it?

A: Manufacturers, design engineers, safety and compliance specialists, test laboratories, maintenance personnel and regulatory bodies involved with power transformers and reactors.

Q: Is it current or superseded?

A: Bibliographic registries and commercial libraries list the standard as in force ("ДЕЙСТВУЕТ"); limitations on its effectiveness were lifted by Gosstandart decisions in the 1990s. However, for specific regulatory or certification purposes users should verify whether more recent national or sectoral standards (for example GOST R variants) or technical regulations have replaced or supplemented particular requirements.

Q: Is it part of a series?

A: Yes — it belongs to the GOST 12.2.007 series (multiple part numbers cover different classes of electrical equipment) and is linked to the general electrical safety requirements in GOST 12.2.007.0-75 and other parts of the occupational safety standards system.

Q: What are the key keywords?

A: Power transformer, autotransformer, reactor, electrical safety, grounding, enclosure, degree of protection, occupational safety, GOST 12.2.007.2-75.