IEEE C57.105-1978
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
IEEE Guide for Application of Transformer Connections in Three-Phase Distribution Systems
04-07-2020
English
10-20-1978
1 Scope
2 Electrical Connections
2.1 Primary and Secondary Systems
2.2 Delta and Y Connections
2.3 Zigzag-Connected Winding
2.4 T-T Connections
2.5 Terminal Markings, Phase Relations, and Paralleling
2.6 Connection of the Neutral
3 Magnetic Circuits
3.1 General Transformer Design
3.2 3-Phase Transformer Core Configuration
3.3 Magnetic Circuit Effects on 3-Phase Transformer Behavior
4 Harmonic Currents and Voltages
4.1 Exciting Current Harmonics
4.2 Harmonic Generation
4.3 Flow on 3-Phase System
4.4 Telephone Noise
5 Primary Faults
5.1 Types and Clearing of Faults
5.2 Ground Faults
5.3 Open Conductor Faults
6 Unbalanced Loads and Secondary Ground Faults
6.1 Phase-to-Neutral Loads
6.2 Phase-to-Phase Loads
6.3 Secondary Faults
7 Ferroresonance
7.1 Qualitative Description
7.2 Transformer Connections Highly Susceptible to Ferroresonance
7.3 Measures to Minimize the Probability of Ferroresonance with
Ungrounded Primary Connection
7.4 Transformer Connections Least Susceptible to Ferroresonance
7.5 Measures to Minimize the Probability of Ferroresonance with
Grounded Primary Connections
7.6 Bibliography
8 Unsymmetrical Banks and Special Connections
8.1 T-Connected
8.2 Circulating Delta Currents
8.3 Grounded Delta Secondary
8.4 Open-Delta Secondary
8.5 Open-Y primary to 4-Wire 208 V Service
8.6 Effect on Voltage Balance
9 References and Bibliography
9.1 General
9.2 Ferroresonance
9.3 Special Connections
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