IEEE Std C57.98-2011 PDF

Full title and description

IEEE Std C57.98-2011 — IEEE Guide for Transformer Impulse Tests. This guide provides practical background, recommended procedures and troubleshooting information to aid interpretation and application of the impulse-testing requirements found in IEEE transformer test codes; it addresses transformer connections, impulse test methods, circuit configurations, lightning-impulse and switching-impulse testing, and failure analysis for power, distribution and instrument transformers.

Abstract

A practical guide intended to clarify and supplement the impulse-testing requirements in IEEE transformer test standards. It compiles test techniques, recommended circuit arrangements, measurement and recording practices, examples of non‑linear behaviour, transfer-function considerations and troubleshooting guidance based on industry experience to improve the consistency and reliability of impulse tests on transformers.

General information

• Status: Inactive — Inactive/Reserved (the 2011 revision was approved by IEEE but later marked Inactive-Reserved in IEEE records).
• Publication date: Designated 2011 (IEEE Std C57.98-2011); Board approval 7 December 2011; published 9 March 2012.
• Publisher: Institute of Electrical and Electronics Engineers (IEEE).
• ICS / categories: Transformers and reactors — industrial electrotechnical category (commonly classified under ICS 29.180 / transformer standards).
• Edition / version: IEEE Std C57.98-2011 (designated 2011 revision).
• Number of pages: 92 pages (typical published PDF length).

Scope

The guide explains and supplements impulse-testing requirements used for transformers — focusing on recommended test arrangements and procedures for lightning and switching impulses, how to select and configure test circuits and connections, measurement and recording practices, interpretation of results including non‑linear and transfer‑function effects, and methods for diagnosing and analysing impulse test failures. It is written primarily for power transformers but is generally applicable to distribution and instrument transformers.

Key topics and requirements

• Purpose and scope of impulse testing for transformers, and relationship to IEEE transformer test codes.
• Recommended transformer connections and circuit configurations for lightning-impulse and switching-impulse tests.
• Test apparatus, measurement techniques, digital recording and waveform analysis practices.
• Transfer-function considerations and handling of non-linear device behaviour during impulse tests.
• Failure analysis, troubleshooting procedures and examples of common impulse-test problems.
• Guidance to interpret and apply requirements contained in IEEE Standard Test Codes for transformers.

Typical use and users

Used by transformer design and test engineers, factory and independent test laboratories, utility test personnel, manufacturers, and researchers who perform or interpret impulse testing on power, distribution and instrument transformers. The guide is a practical reference for personnel responsible for setting up impulse tests, analysing waveforms, and troubleshooting impulse-test anomalies.

Related standards

Relevant IEEE transformer standards and test codes commonly used together with C57.98 include IEEE Std C57.12.00 (general requirements for liquid-immersed distribution, power, and regulating transformers), and IEEE Std C57.12.90 (Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers), which contain the formal test requirements that C57.98 helps interpret and apply. Other related documents in the C57 family (test codes and device-specific standards) are typically referenced when planning or reporting impulse tests.

Keywords

impulse test, transformer impulse tests, lightning impulse, switching impulse, transformer test circuits, transformer failure analysis, transfer function, non-linear behaviour, waveform recording, IEEE C57.98.

FAQ

Q: What is this standard?

A: IEEE Std C57.98-2011 is a guide titled "IEEE Guide for Transformer Impulse Tests" that provides practical interpretation, recommended procedures and troubleshooting guidance for performing impulse tests on transformers.

Q: What does it cover?

A: It covers recommended transformer connections, impulse-test circuit configurations, measurement and recording techniques, transfer-function and non‑linear behaviour considerations, switching and lightning impulse test practices, and methods for analysing and diagnosing impulse-test failures. It supplements the formal test requirements contained in IEEE transformer test codes.

Q: Who typically uses it?

A: Design and test engineers, manufacturers, utility test crews, factory and independent test laboratories, and researchers involved in transformer testing and diagnostics. It is a practical reference for those who specify, perform or interpret impulse tests.

Q: Is it current or superseded?

A: The document is the 2011-designated revision (IEEE Std C57.98-2011, published March 9, 2012). IEEE records list its status as Inactive‑Reserved; users should check IEEE SA records or the IEEE Xplore catalog for any later revisions or current status before relying on it as the primary authoritative document.

Q: Is it part of a series?

A: Yes — it is part of the broader IEEE C57 family of transformer standards and test codes. C57.98 is a guidance document that relates to formal test codes in the family (for example C57.12.90 and related C57.xx standards) and is intended to be used alongside those standards.

Q: What are the key keywords?

A: Impulse test, lightning impulse, switching impulse, transformer test circuit, waveform recording, transfer function, failure analysis, troubleshooting, IEEE C57.98.