1 Overview
1.1 Scope
1.2 Purpose
2 References
3 Transformer no-load losses
3.1 General
3.2 Parameters affecting magnitude of
no-load losses
3.4 Excitation current (no-load current)
3.5 Test requirements
3.6 Measurement of no-load losses
3.7 Measurement of excitation current
3.8 Measuring circuitry for three-phase
transformers
4 Transformer load losses
4.1 General
4.2 Measuring circuitry
4.3 Load loss measurement uncertainties
4.4 Corrections to measured load losses
4.5 Measuring circuitry for three-phase
transformers
5 Advanced measuring systems
5.1 Enhanced conventional system
5.2 Advanced voltage and current transducers
5.3 Bridge method
6 Specified tolerances on losses
6.1 Specified tolerances on no-load losses
6.2 Specified tolerances on total losses
7 Traceability and calibration
8 Grounding, shielding, and safety
8.1 Grounding
8.2 Shielding
8.3 Safety
ANNEX A - Normative
Bibliography