IEEE Std C57.113-2023 PDF

Full title and description

IEEE C57.113-2023 — IEEE Recommended Practice for Partial Discharge Measurement in Liquid-Filled Power Transformers and Shunt Reactors. The document provides guidance on wideband apparent-charge measurement of partial discharges (PDs) that can occur in liquid‑filled power transformers and shunt reactors during AC dielectric tests, and specifies major components of PD measuring circuits and calibrators in accordance with established PD measurement practice.

Abstract

This recommended practice describes the wideband method for measurement of the apparent charge of partial discharges in liquid‑filled power transformers and shunt reactors when excited by AC test voltages (typically in the range covered by the standard). It specifies characteristics and performance of the PD measuring circuit and calibrator (referencing IEC/EN practice for PD measurement), describes test circuits and calibration procedures, and gives recommendations for PD test execution and evaluation of results to support consistent interpretation of PD activity.

General information

• Status: Active standard (current recommended practice).
• Publication date: Published March 12, 2024 (Board approval recorded 8 November 2023; edition identified as 2023).
• Publisher: Institute of Electrical and Electronics Engineers (IEEE), Power & Energy Society / Transformers committee.
• ICS / categories: 29.180 — Transformers; Reactors (power-transformer test practice).
• Edition / version: Designated 2023 (supersedes IEEE C57.113-2010).
• Number of pages: Approximately 45 pages in the published PDF product (page counts reported by distributors vary slightly by format and redline editions).

Scope

The standard covers wideband apparent‑charge measurement techniques for partial discharges occurring in liquid‑filled power transformers and shunt reactors during AC dielectric tests (test voltages in the range addressed by the practice). It addresses the major components of the PD measuring system (coupling, detectors, cabling, and calibrators), calibration and performance verification in the complete test circuit, recommended test procedures, and guidance for evaluating and reporting PD results. The practice aligns PD measurement characteristics with IEC/EN partial‑discharge measurement requirements.

Key topics and requirements

• Wideband apparent‑charge PD measurement methodology for liquid‑filled transformers and shunt reactors.
• Specification of PD measuring‑circuit components and calibrator performance consistent with IEC practice.
• Calibration procedures and performance checks for the complete test circuit (including calibrator tests and system verification).
• Recommended PD test procedures for induced‑voltage dielectric tests and guidance on test setup (coupling, grounding, and noise mitigation).
• Guidance on evaluation, interpretation, and reporting of PD measurements to improve consistency across laboratories and field testing.
• Notes on frequencies and voltage waveforms applicable to PD testing in power‑transformer practice (alignment with AC test frequency ranges).

Typical use and users

This recommended practice is used by transformer manufacturers, independent test laboratories, utility test engineers, commissioning and maintenance teams, and researchers involved in dielectric testing and condition assessment of liquid‑filled transformers and shunt reactors. Typical applications include factory type and routine tests, site acceptance and commissioning tests, forensic PD investigations, and comparative PD measurements for condition monitoring programs.

Related standards

Key related and normative documents include IEC/EN 60270 (charge‑based partial discharge measurements / PD measurement techniques) which is a primary normative reference for PD measurement practice; other relevant IEEE transformer standards and guides include IEEE C57.104 (interpretation of gases and transformer condition diagnostics), IEEE C57.160 (PD measurement for bushings and instrument transformers guidance), IEEE C57.131 and guides on monitoring and testing of transformer components. These standards are commonly cross‑referenced in transformer PD testing work.

Keywords

partial discharge; PD measurement; apparent charge; wideband PD; calibrator; liquid‑filled power transformer; shunt reactor; dielectric test; IEC 60270; PD test procedures.

FAQ

Q: What is this standard?

A: IEEE C57.113-2023 is a recommended practice that defines methods and requirements for wideband apparent‑charge partial discharge measurement in liquid‑filled power transformers and shunt reactors.

Q: What does it cover?

A: It covers the PD measuring circuit and calibrator specifications, calibration procedures, recommended test circuits and procedures for AC dielectric PD testing (including guidance on noise control and interpretation), and alignment with IEC charge‑based PD measurement practices.

Q: Who typically uses it?

A: Transformer manufacturers, utility and independent test laboratories, commissioning and maintenance engineers, and researchers performing PD testing, factory and site dielectric tests, and condition assessment for liquid‑filled transformers and shunt reactors.

Q: Is it current or superseded?

A: It is the current active recommended practice (designated 2023) and supersedes IEEE C57.113-2010; publication by IEEE occurred in March 2024 following board approval in November 2023.

Q: Is it part of a series?

A: It sits within the IEEE transformer standards and guides produced by the Power & Energy / Transformers committee and is commonly used alongside other transformer standards and PD‑measurement guidance (for example IEC 60270, IEEE C57.104, IEEE C57.160, and other C57 series documents).

Q: What are the key keywords?

A: Partial discharge, apparent charge, wideband PD measurement, calibrator, liquid‑filled transformer, shunt reactor, dielectric testing, IEC 60270.