SIST IEC 60050-471:2017/A1:2017

Overview

IEC 60050-471 Amendment 1 is an important update to the International Electrotechnical Vocabulary (IEV) Part 471: Insulators. Published by the International Electrotechnical Commission (IEC), this amendment refines and enhances terminology related to insulators used in electrical engineering. It supports consistent communication and standardization across the industry by clarifying definitions and technical terms associated with insulation components.

This 2017 amendment aligns vocabulary with the latest industry practices by incorporating approved change requests from IEC Technical Committee 1 on Terminology. The updated terms are crucial for engineers, manufacturers, researchers, and standards developers who work with electrical insulation systems and insulators.

Key Topics

• Insulators Terminology: The amendment revises key terms and definitions related to spacing, creepage distance, clearance, and insulation distance through insulation materials.
• Spacing Definition: Replaces the previous definition of spacing (IEV 471-01-20) with a precise meaning-any combination of clearances, creepage distances, and insulation distances. This ensures clarity when specifying mechanical and electrical separation in insulation design.
• Alignment with IEC 60664-2-1: Terminology changes are directly sourced from IEC 60664-2-1:2011, ensuring consistency between related standards focusing on insulation coordination.
• Multilingual Terminology: Terms are presented in English, French, and Slovenian, reflecting the IEC’s international scope and fostering global understanding.

Applications

• Electrical Equipment Design: Precise definitions assist engineers in designing components such as transformers, circuit breakers, and insulators with appropriate insulation distances to ensure operational safety and reliability.
• Insulation Coordination: Enhanced vocabulary supports insulation coordination studies by standardizing terms for clearance and creepage distances, critical in preventing electrical breakdown.
• Standards Development: Provides a reference vocabulary for standards committees and technical documentation related to insulation materials and electrical safety requirements.
• Education and Training: Supports academic programs and professional training by providing authoritative terminology for electrical insulation concepts.
• International Trade & Compliance: Harmonized definitions facilitate compliance with international regulations, reducing misunderstandings and technical barriers in global markets.

Related Standards

• IEC 60664-2-1:2011 – Electrical insulation coordination for equipment within low-voltage systems, which defines detailed requirements for insulation distances.
• IEC 60050 Series – The complete International Electrotechnical Vocabulary series covering electrical engineering terminology across multiple domains.
• IEC 60050-471 (Base Standard) – Part 471 of the IEV specifically focuses on insulator terms and definitions, with Amendment 1 serving as an update.
• IEC Technical Committee 1 – Oversees the development and maintenance of electrotechnical terminology standards, ensuring ongoing relevance and technical accuracy.

Keywords: IEC 60050-471 amendment, International Electrotechnical Vocabulary, insulators terminology, electrical insulation, insulation distances, creepage distance, clearance, insulation coordination, electrical engineering standards, IEC amendments, electrical safety standards