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IEEE C57.127-2007

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

IEEE Guide for the Detection and Location of Acoustic Emissions from Partial Discharges in Oil-Immersed Power Transformers and Reactors
Available format(s)

PDF

Superseded date

02-25-2022

Language(s)

English

Published date

08-24-2007

1 Overview
   1.1 Scope
   1.2 Purpose
   1.3 Safety warnings
2 Definitions
3 Detection and measurement of PD-Background information
4 Introduction to acoustic PD systems
   4.1 All-acoustic system
   4.2 Acoustic system with an electrical PD trigger
   4.3 On-line (continuous) acoustic monitoring system
5 Acoustic signal and transmission characteristics
   5.1 Acoustic signal
   5.2 Acoustic signal propagation from source to tank wall
   5.3 Acoustic signal propagation within the tank wall
   5.4 Velocity of sound in oil
6 AE systems-Equipment specifications
   6.1 Introduction
   6.2 Acoustic systems that record single events
   6.3 Digital signal processing (DSP) workstations that record
        acoustic data over extended periods
   6.4 On-line (continuous) acoustic PD monitoring systems
   6.5 External sensor
   6.6 Internal sensor
   6.7 Three-sensor system
   6.8 Band-pass filter
7 AE testing
   7.1 Personnel qualification and certification
   7.2 Field versus factory test differences
   7.3 General considerations on the application of sensors
8 AE field test procedure
   8.1 Introduction
   8.2 Test setup
   8.3 Sensor placement and initial scan
   8.4 Monitoring techniques
   8.5 Locating the source of the signal
   8.6 Reporting and followup
9 Factory test procedure using an electrical trigger
   9.1 Introduction
   9.2 Initial sensor placement
   9.3 Measurements and changing of sensor placement
10 Characterization of AE signals
   10.1 Introduction
   10.2 General-AC systems
   10.3 Acoustic systems that record single events
   10.4 DSP workstations that record acoustic data over
        extended periods
   10.5 On-line (continuous) acoustic partial discharge
        monitoring systems
   10.6 HVDC transformers and reactors
   10.7 Characteristics of PD from static electrification
   10.8 Acoustic activity from thermal faults, the core,
        mechanical noises, and other sources
   10.9 Comparison between electrical and acoustic signals
11 Integrating AE results with data from oil analysis
12 Acoustic activity interpretation
Annex A (informative) Bibliography
Annex B (informative) Signal processing
Annex C (informative) Wavelet signal processing theory
Annex D (informative) Tutorial and case studies for detection
        and location of AE from PD

Pertains to the detection and location of acoustic emissions from partial discharges and other sources in oil immersed power transformers and reactors. Both electrical sources (partial discharge) and mechanical sources (such as loose clamping, bolts, or insulation parts) generate these emissions.

Committee
Transformers
DevelopmentNote
Supersedes IEEE DRAFT C57.127. (10/2007)
DocumentType
Standard
Pages
55
PublisherName
Institute of Electrical & Electronics Engineers
Status
Superseded
SupersededBy
Supersedes

IEEE C57.140-2006 IEEE Guide for Evaluation and reconditioning of Liquid Immersed Power Transformers
IEEE C57.143-2012 IEEE Guide for Application for Monitoring Equipment to Liquid-Immersed Transformers and Components
IEEE C57.140-2017 IEEE Guide for Evaluation and Reconditioning of Liquid Immersed Power Transformers

IEC 60270:2000+AMD1:2015 CSV High-voltage test techniques - Partial discharge measurements
IEC 60599:2015 Mineral oil-filled electrical equipment in service - Guidance on the interpretation of dissolved and free gases analysis
IEEE C57.104-2008 IEEE Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers
IEEE 484-2002 IEEE Recommended Practice for Installation Design and Installation of Vented Lead-Acid Batteries for Stationary Applications
IEEE 450-2002 IEEE Recommended Practice for Maintenance, Testing , and Replacement of Vented Lead-Acid Batteries for Stationary Applications
ASTM E 650 : 1997 Standard Guide for Mounting Piezoelectric Acoustic Emission Sensors
IEEE 1106-2005 REDLINE IEEE Recommended Practice for Installation, Maintenance, Testing, and Replacement of Vented Nickel-Cadmium Batteries for Stationary Applications

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