ISO 24071-2022 PDF

Full title and description

ISO 24071:2022 — Aircraft — Auto-transformer rectifier units (ATRUs) — General requirements. This International Standard specifies general design, performance and testing requirements for auto-transformer rectifier units intended for use in aircraft electrical systems, with particular applicability to multi-pulse (18-pulse and 24-pulse) ATRU types.

Abstract

This standard defines the general requirements and associated test methods for ATRUs used in aircraft electrical power systems. It addresses electrical performance, thermal and environmental requirements, required documentation and marking, and methods to verify conformity to specified characteristics. The document is primarily applicable to 18-pulse and 24-pulse ATRU designs.

General information

• Status: Published
• Publication date: August 2022
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 49.060 (Aerospace — Aircraft)
• Edition / version: Edition 1 (2022)
• Number of pages: 14 (official ISO published edition)

Key bibliographic and lifecycle metadata (status, publication month, edition and page count) are taken from the ISO record for ISO 24071:2022.

Scope

ISO 24071:2022 applies to auto-transformer rectifier units intended for installation in aircraft electrical systems and specifies the general requirements and test methods needed to demonstrate that an ATRU meets its intended electrical and environmental performance. The standard is mainly aimed at multi-pulse ATRUs (notably 18-pulse and 24-pulse types) and covers requirements related to electrical characteristics, insulation, cooling, protection and documentation necessary for airworthiness and reliable operation in the aircraft environment.

Key topics and requirements

• General design and construction requirements for ATRUs intended for aircraft use.
• Electrical performance characteristics (voltage/current ratings, pulse configuration, harmonics and rectification behavior).
• Specified test methods for verifying performance, insulation, thermal behaviour and electromagnetic compatibility relevant to ATRUs.
• Environmental and mechanical requirements (temperature, vibration, shock, altitude) appropriate to aircraft installations.
• Marking, documentation and manufacturer's data required for installation, maintenance and certification.

Typical use and users

ISO 24071:2022 is used by aircraft manufacturers (OEMs), electrical power system designers, avionics and electrical equipment suppliers, test laboratories, certification and regulatory bodies, and maintenance organisations. It is referenced when specifying, procuring, testing or certifying ATRUs intended for aircraft electrical distribution and conversion systems.

Related standards

Relevant complementary and related documents commonly used with ISO 24071 include civil aviation environmental and equipment test standards and industry documents that address environmental testing, EMC and installation practices for aircraft electrical equipment (for example, aircraft environmental test procedures, electromagnetic compatibility standards and applicable aviation certification guidance). Users typically cross-reference regulatory certification requirements and industry specifications alongside this ISO standard when qualifying ATRUs for aircraft use.

Keywords

auto-transformer rectifier unit, ATRU, aircraft electrical systems, rectifier, multi-pulse, 18-pulse, 24-pulse, electrical power conversion, aircraft power equipment, test methods

FAQ

Q: What is this standard?

A: ISO 24071:2022 is an International Standard that specifies general requirements and test methods for auto-transformer rectifier units (ATRUs) used in aircraft electrical systems.

Q: What does it cover?

A: It covers design and performance requirements, electrical characteristics, environmental and mechanical considerations, test methods to verify conformity, and required marking and documentation for ATRUs — with particular applicability to 18-pulse and 24-pulse units.

Q: Who typically uses it?

A: Aircraft OEMs, equipment suppliers, avionics and electrical engineers, test laboratories, certification authorities and maintenance organisations use this standard when specifying, testing, procuring or certifying ATRUs for aircraft installations.

Q: Is it current or superseded?

A: ISO 24071:2022 is the published (current) edition released in 2022. Users should check national or regulatory catalogues for any amendments or national adoption documents that may affect application in a specific jurisdiction.

Q: Is it part of a series?

A: ISO 24071:2022 is a standalone International Standard addressing ATRUs. Users should consider it together with other aerospace and electrical equipment standards and certification guidance relevant to aircraft electrical power systems.

Q: What are the key keywords?

A: Key keywords include: auto-transformer rectifier unit, ATRU, aircraft electrical systems, 18-pulse, 24-pulse, rectifier, power conversion, test methods.