IEC 62475-2010 PDF

Full title and description

St IEC 62475-2010 — High‑current test techniques: Definitions and requirements for test currents and measuring systems. This international standard defines terminology and sets requirements for measuring systems and test currents used in high‑current testing for both high‑voltage and low‑voltage equipment, covering steady‑state and short‑time DC and AC, and impulse currents.

Abstract

IEC 62475:2010 specifies requirements for high‑current testing and measurement systems, including definitions, procedures for qualification and use of measuring systems, tests and acceptance criteria for approved measuring systems, and guidance on measurement uncertainty and step‑response measurements. The standard generally addresses currents above 100 A (while acknowledging lower currents may occur in some tests) and includes provisions relevant to fault detection during impulse (e.g., lightning) testing.

General information

• Status: Published / Valid (stable in current form; stability date 2026 as listed by the IEC).
• Publication date: 29 September 2010.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 19.080 — Electrical and electronic testing.
• Edition / version: Edition 1.0 (2010).
• Number of pages: 211 pages (full IEC publication multilingual edition).

Key bibliographic and status details are recorded on the IEC publication record.

Scope

IEC 62475:2010 applies to high‑current testing and measurements for both high‑voltage and low‑voltage apparatus. It covers steady‑state direct current, steady‑state alternating current, short‑time direct and alternating currents (as encountered in high‑power testing), and impulse currents. The standard sets out requirements for measuring systems used in these tests, including calibration/qualification methods and aspects of fault detection during impulse testing. In general it addresses currents above roughly 100 A but remains applicable where lower test currents occur.

Key topics and requirements

• Definitions for high‑current test techniques and measuring‑system terminology.
• Requirements for design, components and performance of approved measuring systems used in high‑current tests.
• Procedures for qualification, calibration and verification of measuring systems (including reference measuring systems and component scale factors).
• Test methods and acceptance criteria for steady‑state DC and AC, short‑time DC and AC, and impulse currents.
• Guidance on uncertainty of measurement and worked examples for uncertainty calculations (informative annexes).
• Considerations for step‑response measurements and for current measurement in high‑voltage dielectric testing.

The standard’s table of contents and annexes highlight uncertainty calculation examples and step‑response measurement guidance as important informative material.

Typical use and users

Used by high‑voltage and high‑current test laboratories, equipment manufacturers (transformers, switchgear, surge arresters, circuit‑breakers), utilities, independent calibration laboratories, test‑house engineers and standards committees to define, perform and assess high‑current tests and to ensure measuring systems meet agreed performance and uncertainty requirements.

Related standards

IEC 62475 is intended to be used alongside related IEC standards in high‑voltage test techniques and measurement, including (but not limited to) IEC 60060‑1 (High‑voltage test techniques — General definitions and test requirements), IEC 61180‑1 (high‑voltage test techniques for low‑voltage equipment — definitions and procedures) and IEC 60051‑2 (direct‑acting analogue electrical measuring instruments — special requirements). It is also adopted in regional/European forms as EN 62475:2010.

Keywords

high‑current, measuring system, test current, steady‑state current, short‑time current, impulse current, calibration, uncertainty of measurement, high‑voltage testing, dielectric testing, IEC 62475.

FAQ

Q: What is this standard?

A: IEC 62475:2010 is an international standard that defines terminology and requirements for high‑current test techniques and the measuring systems used to carry out such tests.

Q: What does it cover?

A: It covers steady‑state and short‑time DC and AC testing, impulse‑current measurements, requirements for approved measuring systems, procedures for their qualification and calibration, and guidance on measurement uncertainty and step‑response measurements.

Q: Who typically uses it?

A: Test laboratories, manufacturers of electrical power equipment, utilities, calibration houses, and engineers involved in high‑current and high‑voltage testing use this standard to ensure consistent, reliable measurement and test practice.

Q: Is it current or superseded?

A: As published on 29 September 2010 (Edition 1.0), IEC lists the publication as published/valid with a stability date shown as 2026; users should check their national standards body or the IEC webstore for any amendments, corrigenda or later editions after that date.

Q: Is it part of a series?

A: IEC 62475 is part of the family of IEC standards addressing high‑voltage and high‑current test techniques produced by IEC/TC 42 and is commonly referenced alongside IEC 60060‑1, IEC 61180‑1 and related measurement standards.

Q: What are the key keywords?

A: High‑current, measuring system, test current, steady‑state DC/AC, short‑time current, impulse current, calibration, measurement uncertainty, high‑voltage testing, IEC 62475.