AS/NZS IEC 60076.18:2025
Power transformers – Part 18: Measurement of frequency response
Standard objective is to cover the measurement technique and measuring equipment to be used when a frequency response measurement is required, either on-site or in the factory and when the test object is new or at a later stage. This standard is applicable to power transformers, reactors, phase shifting transformers and similar equipment.
This document is identical to, and has been reproduced from, IEC 60076‑18:2012, Power transformers – Part 18: Measurement of frequency response.
As this document has been reproduced from an international document, the following apply:
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AS/NZS IEC 60076.18:2025
SA/SNZ - Cover page
Preface
FOREWORD
1 Scope
2 Terms and definitions
3 Purpose of frequency response measurements
4 Measurement method
4.1 General
4.2 Condition of the test object during measurement
4.3 Measurement connection and checks
4.3.1 Measurement connection and earthing
4.3.2 Zero-check measurement
4.3.3 Repeatability check
4.3.4 Instrument performance check
4.4 Measurement configuration
4.4.1 General
4.4.2 Principles for choosing the measurement configuration
4.4.3 Star- and auto-connected windings with a neutral terminal
4.4.4 Delta windings and other windings without an accessible neutral
4.4.5 Zig-zag connected windings
4.4.6 Two-winding three-phase transformers
4.4.7 Three-phase auto-transformers
4.4.8 Phase shifting transformers
4.4.9 Reactors
4.4.10 Method for specifying additional measurements
4.5 Frequency range and measurement points for the measurement
5 Measuring equipment
5.1 Measuring instrument
5.1.1 Dynamic range
5.1.2 Amplitude measurement accuracy
5.1.3 Phase measurement accuracy
5.1.4 Frequency range
5.1.5 Frequency accuracy
5.1.6 Measurement resolution bandwidth
5.1.7 Operating temperature range
5.1.8 Smoothing of recorded data
5.1.9 Calibration
5.2 Measurement leads
5.3 Impedance
6 Measurement records
6.1 Data to be recorded for each measurement
6.2 Additional information to be recorded for each set of measurements
Annex A Measurement lead connections
Annex B (informative) Frequency response and factors that influence the measurement
Annex C (informative) Applications of frequency response measurements
Annex D (informative) Examples of measurement configurations
Annex E (informative) XML data format
Bibliography
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AS/NZS IEC 60076.18:2025
SA/SNZ - Cover page
Preface
FOREWORD
1 Scope
2 Terms and definitions
3 Purpose of frequency response measurements
4 Measurement method
4.1 General
4.2 Condition of the test object during measurement
4.3 Measurement connection and checks
4.3.1 Measurement connection and earthing
4.3.2 Zero-check measurement
4.3.3 Repeatability check
4.3.4 Instrument performance check
4.4 Measurement configuration
4.4.1 General
4.4.2 Principles for choosing the measurement configuration
4.4.3 Star- and auto-connected windings with a neutral terminal
4.4.4 Delta windings and other windings without an accessible neutral
4.4.5 Zig-zag connected windings
4.4.6 Two-winding three-phase transformers
4.4.7 Three-phase auto-transformers
4.4.8 Phase shifting transformers
4.4.9 Reactors
4.4.10 Method for specifying additional measurements
4.5 Frequency range and measurement points for the measurement
5 Measuring equipment
5.1 Measuring instrument
5.1.1 Dynamic range
5.1.2 Amplitude measurement accuracy
5.1.3 Phase measurement accuracy
5.1.4 Frequency range
5.1.5 Frequency accuracy
5.1.6 Measurement resolution bandwidth
5.1.7 Operating temperature range
5.1.8 Smoothing of recorded data
5.1.9 Calibration
5.2 Measurement leads
5.3 Impedance
6 Measurement records
6.1 Data to be recorded for each measurement
6.2 Additional information to be recorded for each set of measurements
Annex A Measurement lead connections
Annex B (informative) Frequency response and factors that influence the measurement
Annex C (informative) Applications of frequency response measurements
Annex D (informative) Examples of measurement configurations
Annex E (informative) XML data format
Bibliography
AS/NZS IEC 60076.18:2025
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.