AS NZS IEC 60076.11-2024 PDF

Full title and description

AS/NZS IEC 60076.11:2024 — Power transformers — Part 11: Dry‑type transformers. This joint Australian/New Zealand adoption identically adopts IEC 60076‑11:2018 and provides requirements, performance criteria and test methods for dry‑type power transformers (including autotransformers) with highest voltage for equipment up to and including 72.5 kV and with at least one winding operating above 1.1 kV.

Abstract

AS/NZS IEC 60076.11:2024 establishes service conditions, ratings, thermal and dielectric design considerations, safety and performance requirements, and test procedures specific to dry‑type power transformers. It clarifies environmental and climatic classes, fire‑performance classes (including limits and test processes), altitude and seismic considerations, and gives guidance for application and verification of dry‑type transformer designs for industrial, utility and commercial use. The document is an identical national adoption of the IEC text and replaces the previous Australian edition.

General information

• Status: Current (published national adoption)
• Publication date: 20 September 2024
• Publisher: Standards Australia / Standards New Zealand (joint adoption)
• ICS / categories: 29.180 — Transformers; Reactors
• Edition / version: AS/NZS IEC 60076.11:2024 (identical adoption of IEC 60076‑11:2018)
• Number of pages: 57

Scope

Applies to dry‑type power transformers (including autotransformers) having highest voltage for equipment up to and including 72.5 kV and where at least one winding operates at greater than 1.1 kV. Exclusions include: gas‑filled dry‑type transformers using gases other than air; single‑phase transformers rated below ~5 kVA; polyphase transformers below ~15 kVA; instrument, starting, testing and traction transformers mounted on rolling stock; flameproof/mining transformers; welding and certain small safety‑critical transformers; and voltage‑regulating transformers when specific other standards apply. Where IEC guidance does not exist for special transformers, relevant clauses may be applied as appropriate.

Key topics and requirements

• Definitions, service conditions and rated values (voltages, power, frequency, insulation levels).
• Thermal design and temperature‑rise limits for windings and core; cooling and continuous loading criteria.
• Dielectric requirements, insulation coordination and altitude corrections.
• Performance tests: routine, type and special tests including heat run, impulse and short‑circuit considerations as applicable.
• Safety and construction requirements relevant to dry‑type designs (clearances, creepage, mechanical strength).
• Fire behaviour classification and test requirements (with specific limits, e.g. considerations up to defined kVA thresholds).
• Environmental and climatic classes, ingress protection guidance and recommendations for corrosive or polluted environments.
• Seismic class guidance and mechanical design considerations for installation in seismic regions.
• Recommendations for materials and special constructions (including guidance for amorphous‑core and other low‑loss designs).

Typical use and users

Used by transformer manufacturers, design engineers, utilities and distribution network operators, specifying and procurement teams, test laboratories, certification bodies and consulting engineers. Typical applications include industrial and commercial power distribution, renewable energy and utility substations where dry‑type transformers are preferred for fire safety, indoor installations or locations with environmental constraints.

Related standards

Part of the IEC/AS/NZS 60076 family and commonly used alongside: AS/NZS/IEC 60076‑1 (General), 60076‑2 (Temperature rise), 60076‑3 (Insulation levels and dielectric tests), 60076‑5 (Ability to withstand short circuit), 60076‑10 (Sound levels), 60076‑12 (Loading guide), IEC 60071 (insulation coordination), IEC 60085 (temperature limits and classification), IEC 60332/60332‑3‑10 (flame propagation tests), IEC 60529 (IP code), and relevant environmental and corrosion standards (for example ISO 12944 series) and seismic design guidance where applicable.

Keywords

dry‑type transformer, power transformer, AS/NZS, IEC 60076‑11, insulation, temperature rise, dielectric test, fire performance, seismic class, ratings, testing, transformer design

FAQ

Q: What is this standard?

A: AS/NZS IEC 60076.11:2024 is the Australian/New Zealand national adoption of IEC 60076‑11 and sets requirements and test methods for dry‑type power transformers (including autotransformers) up to equipment voltages of 72.5 kV where at least one winding exceeds 1.1 kV.

Q: What does it cover?

A: It covers service conditions, ratings, thermal and dielectric design considerations, construction and safety requirements, routine and type tests, environmental and fire behaviour classes, and guidance on application and verification of dry‑type transformer designs.

Q: Who typically uses it?

A: Transformer manufacturers, electrical design engineers, utilities and distributors, procurement/specification teams, testing and certification laboratories, and consulting engineers involved in specifying, designing, manufacturing or testing dry‑type transformers.

Q: Is it current or superseded?

A: Current. AS/NZS IEC 60076.11:2024 was published on 20 September 2024 and supersedes the earlier AS 60076.11‑2006 Australian edition.

Q: Is it part of a series?

A: Yes — it is Part 11 of the IEC 60076 series (Power transformers). The series includes Part 1 (General), Part 2 (Temperature rise), Part 3 (Insulation levels and dielectric tests), Part 5 (Short‑circuit), Part 10 (Sound), Part 12 (Loading guide), and others addressing specific transformer topics.

Q: What are the key keywords?

A: Dry‑type transformer, power transformer, IEC 60076, AS/NZS, temperature rise, dielectric test, fire class, seismic, ratings, testing.