Mantneimiento De Transformadores

FACILITIES INSTRUCTIONS, STANDARDS, AND TECHNIQUES VOLUME 3-31

TRANSFORMER DIAGNOSTICS

JUNE 2003 UNITED STATES DEPARTMENT OF THE INTERIOR
BUREAU OF RECLAMATION

REPORT DOCUMENTATION PAGE

Form Approved OMB No. 0704-0188

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searchingexisting data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suit 1204,Arlington VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Report (0704-0188), Washington DC 20503.

1. AGENCY USE ONLY (Leave Blank) 4. TITLE AND SUBTITLE

2. REPORT DATE

3. REPORT TYPE AND DATES COVERED

June 2003 FIST 3-31, Transformer Diagnostics

Final
5. FUNDING NUMBERS

6. AUTHOR(S)

Bureau of Reclamation Hydroelectric Research and TechnicalServices Group Denver, Colorado
7. PERFORMING ORGANIZATIONS NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT NUMBER

Bureau of Reclamation Denver Federal Center PO Box 25007 Denver CO 80225-0007
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)

FIST 3-31

Hydroelectric Research and Technical Services Group Bureau of Reclamation Mail Code D-8450 PO Box 25007 Denver CO 8022511. SUPPLEMENTARY NOTES

10. SPONSORING/MONITORING AGENCY REPORT NUMBER

DIBR

12a. DISTRIBUTION AVAILABILITY STATEMENT

12b. DISTRIBUTION CODE

Available from the National Technical Information Service, Operations Division, 5285 Port Royal Road, Springfield, VA 22161

13. ABSTRACT (Maximum 200 words)

FIST 3-31 provides guidance to Bureau of Reclamation (Reclamation) powerplantpersonnel in transformer diagnostics. Transformers rated 5,000 kilovoltamperes (kVA) and above are considered power transformers. All generator step-up (GSU) transformers, and may station service and excitation transformers are considered power transformers because they are rated 500 kVA or larger.

14. SUBJECT TERMS

15. NUMBER OF PAGES

62
16. PRICE CODE

17. SECURITY CLASSIFICATION OF REPORT18. SECURITY CLASSIFICATION OF THIS PAGE

19. SECURITY CLASSIFICATION OF ABSTRACT

20. LIMITATION OF ABSTRACT

UL
NSN 7540-01-280-5500

UL

UL

UL
Standard Form 298 (Rev. 2-89)
Prescribed by ANSI Std. 239-18 298-102

FACILITIES INSTRUCTIONS,
STANDARDS, AND TECHNIQUES
VOLUME 3-31


TRANSFORMER DIAGNOSTICS

HYDROELECTRIC RESEARCH AND TECHNICAL SERVICES GROUP

UNITEDSTATES DEPARTMENT OF THE INTERIOR
BUREAU OF RECLAMATION JUNE 2003

DISCLAIMER
This written matter consists of general information for internal Bureau of Reclamation operations and maintenance staff use. The information contained in this document regarding commercial products or firms may not be used for advertising or promotional purposes and is not to be construed as an endorsement of anyproduct or firm by the Bureau of Reclamation.

CONTENTS
Page

1. Introduction ............................................................................................... 2. Reference Documents ................................................................................ 3. Transformer Diagnostics and Transformer Maintenance........................... 4. Transformer Diagnostics andPowerplant Rehabilitation .......................... 5. Dissolved Gas Analysis.............................................................................. 5.1 Background ....................................................................................... 5.2 Transformer Diagnosis Using Individual and Total
Dissolved Key Gas Concentrations................................................ 5.3...