GOST 1516.1-76 PDF

Full title and description

GOST 1516.1-76 — "Electrical equipment for a.c. voltages from 3 to 500 kV. Requirements to electrical strength of insulation". The standard establishes requirements for the electrical strength (dielectric strength) of insulation for alternating-current electrical equipment with rated voltages from 3 kV up to 500 kV.

Abstract

This standard specifies methods, test levels and minimum requirements for dielectric strength and electrical insulation testing of a.c. electrical equipment intended for three-phase and single-phase operation at 50 Hz in voltage classes from 3 to 500 kV. It covers factory and type tests intended to verify insulation capability under normal and specified abnormal conditions and includes references to climatic and placement categories used when selecting test regimes.

General information

• Status: Active / in force (standard adopted in the USSR and retained in current collections of national standards).
• Publication date: Approved 6 December 1976; put into effect 1 January 1978 (original designation 1516.1-76).
• Publisher: Approved by the State Committee for Standards (Gosstandart) of the USSR; published as a national/interstate standard (later maintained in national collections).
• ICS / categories: Electrical engineering — high-voltage equipment and insulation requirements; applies to a.c. equipment in the 3–500 kV range.
• Edition / version: Original edition 1976 (introduced 1978) with multiple later amendments issued (noted amendments across 1978–2004 in collections).
• Number of pages: 50 pages (typical published electronic/print edition).

Scope

The standard applies to alternating-current electrical equipment of rated voltage classes from 3 kV to 500 kV, including three-phase (three-pole) and single-phase (single-pole) designs intended for 50 Hz operation. It defines dielectric strength requirements, test types (routine, type, and special tests), and test levels taking into account climatic versions (e.g., U, HL, T) and placement categories (1–4) as per GOST 15150. The scope encompasses both factory and type testing intended to ensure reliable insulation performance during operation and under specified overvoltage conditions.

Key topics and requirements

• Definition of applicable voltage classes (3 kV to 500 kV) and the types of equipment covered.
• Requirements for dielectric strength of insulation — minimum test voltages and acceptable withstand criteria for type and routine tests.
• Specification of test methods and procedures for a.c. voltage testing of insulation (type, routine and special tests).
• Consideration of climatic categories and placement categories when choosing test regimes and limits (referencing GOST 15150 for climatic/placement definitions).
• Reference to normative documents and related standards governing test methods, mechanical and climatic influences, and transformer testing where applicable.

Typical use and users

Used by manufacturers of high-voltage electrical equipment (transformers, switchgear, bushings, insulators, surge arresters, etc.), testing laboratories, utilities and transmission authorities, certification bodies, and design engineers to verify insulation performance, set type-test and routine-test regimes, and ensure compliance with national safety and reliability requirements.

Related standards

Commonly referenced alongside other GOST standards such as GOST 1516.2-76 (general methods for testing electrical strength of insulation for equipment at 3 kV and above), GOST 15150 (climatic and placement categories), and various transformer and equipment testing standards (examples: transformer test standards that cite GOST 1516.1-76 as a normative reference).

Keywords

GOST 1516.1-76; high-voltage equipment; dielectric strength; insulation testing; a.c. voltages 3–500 kV; type tests; routine tests; climatic categories; GOST 15150.

FAQ

Q: What is this standard?

A: GOST 1516.1-76 is a national/interstate standard originally adopted in the USSR that sets requirements for the electrical strength (dielectric strength) of insulation for alternating-current electrical equipment with rated voltages from 3 kV to 500 kV.

Q: What does it cover?

A: It covers dielectric strength criteria, test types (type, routine, special), test voltages and procedures for verifying insulation performance for equipment in the 3–500 kV range, and how climatic and placement categories influence testing.

Q: Who typically uses it?

A: Manufacturers of high-voltage apparatus, independent and factory test laboratories, utilities, design and QA engineers, and certification/inspection bodies use the standard to design and verify insulation testing programs.

Q: Is it current or superseded?

A: The standard was approved in 1976 and came into force 1 January 1978; it is maintained in collections of national standards and is commonly listed as active in commercial standards databases, although users should always confirm national applicability and any later replacements or harmonized standards with their national standards body before relying on it for regulatory compliance.

Q: Is it part of a series?

A: Yes — it is part of a family of standards dealing with electrical equipment and dielectric testing (for example, GOST 1516.2-76 covers general methods of testing electrical strength of insulation for equipment at 3 kV and above), and it is used together with climate/placement standards such as GOST 15150.

Q: What are the key keywords?

A: Dielectric strength, insulation testing, high-voltage equipment, 3–500 kV, type tests, routine tests, climatic categories, GOST 1516.1-76.