Power Transformer Maintenance and Acceptance Testing

terspolarma

TABLE OF CONTENTS

INTRODUCTION / SAFETY
Purpose
scope
References
Maintenance and tesdng
safety
Nameplatedata

CONSTRUCTIONlTHEORY
Transfomer applications
Magnetic flux
Winding,current and voltage ratios
Core construction
Core form construction
Shell form construction

TRANSFORMER CONNECTIONS AND TAPS
Tapped Primaries and secondaries
Polarity
Autotransfomers
Single and multi-phase relationships
Delta-wye and wye-delta displacements

COOLING CONSTRUCTION CLASSIFlCATIONS
Classifications
Dry-type transfomers
Liquid-filled transformers
Tank construction
Free breathing tanks
Consevator tank
Gas-oil sealed tank
Automatic inet gas sealed tanks
Sealed tank type

INSULATING FLUIDS
Oil
Oil testing
Dissolved gas in oil analysis
Transformer oil sampling
Synthetics and other insulating fluids

INITIAL ACCEPTANCE INSPECTION TESTING
Acceptance
Pre arrival preparations
Receiving and inspection
Moving and storage
Internal inspection
Testing for leaks
Vacuum filling

TRANSFORMER TESTING
Test data
Direc tcurrent testing
Alternating current testing

TRANSFORMER AUXILIARY EQUIPMENT
Auxiliaries
Bushings
Pressure relief devices
Pressure gauges
Temperature gauges
Tap changers
Lightning (surge) arresters

COMPREHENSIVE MAlNTENANC / TESTING PROGRAM
Transformer maintenance
Maintenance and testing program
Documentation
Scheduling

STATUS OF TRANSFORMER MONITORING AND DIAGNOSTICS
Introduction
Transformer Monitoring
Transformer diagnostics
Conclusions
REFERENCES

http://www.artikel-software.com/file/powertrans.pdf