IEC 60060-1:2025

Overview

IEC 60060-1:2025, titled High-voltage test techniques – Part 1: General terminology and test requirements, is an updated international standard published by the International Electrotechnical Commission (IEC). This fourth edition replaces the 2010 version, introducing significant technical revisions to improve clarity and applicability. The standard focuses on defining terminology and establishing generalized test requirements for high-voltage dielectric testing on electrical equipment rated above 1.0 kV AC and 1.5 kV DC.

This document covers dielectric tests using direct voltage, alternating voltage, impulse voltage, and combinations thereof. It provides guidelines for voltage generation, measurement, and test procedures to ensure reproducible and significant test results in high-voltage environments.

Key Topics

• Terminology and Definitions: Clear definitions covering discharge characteristics, test voltages, tolerances, statistical analysis, and voltage classifications for direct, alternating, lightning impulse, switching impulse, combined, and composite voltage tests.
• Test Procedures: General requirements for test setups including dry and wet conditions, artificial pollution tests, and atmospheric corrections considering pressure, temperature, and humidity.
• Voltage Generation and Measurement: Specifications for generating and measuring direct, alternating, impulse, and combined test voltages, including impulse shape determination and current measurement during tests.
• Updates and Technical Revisions:
  • Enhanced clause structure for combined and composite voltages to improve usability.
  • New switching impulse front time definition (170/2 500 µs), aligning with lightning impulse voltage parameters.
  • Extended positive tolerance for lightning impulse front time at highest voltages (Um > 800 kV).
  • Introduction of new informative annexes detailing manual calculation procedures from graphical waveforms and switching impulse voltage front time definitions.
  • Adjusted requirements for precipitation effects based on equipment voltage levels.
• Statistical Treatment of Results: Annex A offers detailed methodologies to classify, analyze, and interpret disruptive discharge voltage test outcomes using statistical techniques including maximum likelihood methods.
• Software Implementation Guidance: Annex D provides insight into developing software for evaluating lightning impulse voltage parameters, supporting automation and enhanced accuracy.

Applications

IEC 60060-1:2025 is fundamental for manufacturers, testing laboratories, and engineers involved in high-voltage electrical equipment design, testing, and certification. Key practical uses include:

• Dielectric Strength Testing: Ensuring insulation systems in transformers, switchgear, cables, and other power apparatus can withstand specified high voltages under different test conditions.
• Quality Assurance: Standardized testing procedures encompassing direct voltage, alternating voltage, lightning, and switching impulses help maintain consistent quality and safety standards worldwide.
• Research and Development: Provides a framework to develop new test techniques and equipment certifications aligned with international best practices.
• Compliance and Harmonization: Supports regulatory compliance by establishing globally accepted testing terminology and criteria which aid communication and comparison among manufacturers and testing institutions.
• Atmospheric Correction Application: Enables accurate testing under varying environmental conditions, critical for ensuring reliability in different geographical and climatic regions.

Related Standards

IEC 60060-1:2025 is part of a broader series of standards dealing with high-voltage testing techniques. Related IEC standards include:

• IEC 60060-2 – High-voltage test techniques – Part 2: Measurement of partial discharges.
• IEC 60270 – High-voltage test techniques – Partial discharge measurements.
• IEC 60344 – High-voltage test techniques – Testing of surge arrester devices.
• IEC 61083 – High-voltage test techniques – Use of standard lightning impulse voltages.
• IEC 61869 series – Instrument transformers – for companion high-voltage test procedures.

Together, these standards deliver comprehensive guidance for high-voltage testing, ensuring equipment safety, reliability, and conformity with international electrical engineering requirements.

Keywords: IEC 60060-1, high-voltage test techniques, dielectric tests, direct voltage, alternating voltage, impulse voltage, switching impulse, lightning impulse, test requirements, electrical equipment testing, high-voltage insulation, atmospheric correction, international standard, IEC.