IEC 60060-3:2006

Overview

IEC 60060-3:2006 - High-voltage test techniques - Part 3: Definitions and requirements for on-site testing - defines the terms, requirements and practical criteria for performing high-voltage tests in the field. It applies to on-site test voltages and in-service stresses related to IEC 60060-1, including direct voltage, alternating voltage, lightning impulse (aperiodic or oscillating), and switching impulse (aperiodic or oscillating). Special on-site tests covered include very low frequency and damped alternating voltage. The standard is applicable to equipment with highest voltage U > 1 kV and recognises that on-site conditions (weather, external fields) differ from laboratory environments.

Key topics and requirements

• Scope and definitions: Clear terminology for on-site testing, impulse shapes, prospective vs actual characteristics, and classification of insulation (self-restoring vs non-self-restoring).
• Test categories: Procedures and definitions for direct, alternating, lightning impulse and switching impulse voltages; also very low frequency and damped alternating tests.
• Measurement and calibration: Requirements for measuring systems, measurement of test voltages, determination of impulse shapes and accounting for measuring uncertainties.
• Checks and records: Acceptance tests, performance tests, performance checks and maintaining a record of performance for measuring equipment.
• Withstand test procedures: Guidance on performing on-site withstand testing and the interpretation of prospective vs actual characteristics when disruptions (discharges) occur.
• Practical limitations: Emphasis that IEC 60060-1/-2 lab requirements may not always be achievable on-site; selection of on-site test voltages and levels is the responsibility of the relevant technical committee and must account for larger tolerances.

Applications and users

IEC 60060-3 is primarily used by:

• Utility test engineers and commissioning teams performing on-site withstand tests during commissioning or after repair.
• Maintenance and diagnostics specialists conducting partial discharge (PD) testing and insulation condition assessments.
• Manufacturers and field service providers validating transport/erection integrity of high-voltage apparatus.
• Standards committees and test laboratories specifying or harmonizing on-site test procedures and safety margins.

Typical applications include commissioning verification, post-repair validation, diagnostic field testing, and establishing on-site test protocols where laboratory standards cannot be fully replicated.

Related standards

• IEC 60060-1: General definitions and test requirements (reference for characteristics and definitions).
• IEC 60060-2: Measuring systems (requirements for measurement equipment and calibration).
• IEC 60071-1: Insulation coordination - definitions and principles.

Keywords: IEC 60060-3, high-voltage test techniques, on-site testing, direct voltage, alternating voltage, lightning impulse, switching impulse, measuring systems, withstand tests, partial discharge, insulation testing.