IEEE C57.105-1978. IEEE Guide for Application of Transformer Connections in Three-Phase Distribution Systems

39 pages.
Transformers Committee of the IEEE Power Engineering Society
Approved 2 June 1977
Reaffirmed 11 June 1987
Reaffirmed 18 June 1992
Institute of Electrical and Electronics Engineers
This guide concerns transformer connections in 3-phase distribution systems. Distribution systems are characterized by primary voltages up to and including 34.5 kV, usually have a preponderance of connected transformers with low voltage windings below 1000 V and furnish electric service to consumers. The characteristics of the various transformer connections and possible operating problems under normal or abnormal conditions are treated.
Clause:
Scope
Electrical Connections
Magnetic Circuits
Harmonic Currents and Voltages
Primary Faults
Unbalanced Loads and Secondary Ground Faults
Ferroresonance
Unsymmetrical Banks and Special Connections
References and Bibliography