IEC TS 60076-19:2013

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Power measurement, systematic deviation and uncertainty
6 Procedures for no-load loss measurement
7 Procedures for load loss measurement
8 Three-phase calculations
9 Reporting
10 Estimate of corrections and uncertainty contributions
Annex A (informative) - Example of load loss uncertainty
        evaluation for a large power transformer
Annex B (Informative) - Example of load loss uncertainty
        evaluation for a distribution transformer
Bibliography

IEC/TS 60076-19:2013, which is a Technical Specification, illustrates the procedures that should be applied to evaluate the uncertainty affecting the measurements of no-load and load losses during the routine tests on power transformers. Even if the attention is especially paid to the transformers, when applicable the specification can be also used for the measurements of reactor losses, except large reactors with very low power factor.