IEEE C57.105-2019(Redline)

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IEEE Guide for Application of Transformer Connections in Three-Phase Electrical Systems (Redline)

Published By	Publication Date	Number of Pages
IEEE	2019

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Description

Revision Standard – Active. Descriptions of products, methods, and procedures relating to stationary batteries, battery electrolyte spill mechanisms, electrolyte containment and control methodologies, and firefighting considerations are provided.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C57.105™-2019 Front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
7	Participants
9	Introduction
10	Contents
11	1. Overview 1.1 Scope 2. Normative references 3. Definitions
12	4. Electrical connections 4.1 Primary and secondary systems 4.2 Delta and wye connections
13	4.3 Zigzag-connected winding
14	4.4 T-T connections
16	4.5 Terminal markings, phase relations, and paralleling
20	4.6 Connection of the neutral
21	5. Magnetic circuits 5.1 General transformer design
22	5.2 Single-phase transformer core/coil configuration
23	5.3 Three-phase transformer core configuration
25	5.4 Magnetic circuit effects on three-phase transformer behavior
26	6. Harmonic currents and voltages 6.1 Exciting current harmonics 6.2 Harmonic generation
27	6.3 Harmonic current flow in a three-phase system 6.4 Power line interference with communication circuits
28	7. Primary faults 7.1 Types and clearing of faults 7.2 Ground faults
30	7.3 Open conductor faults 8. Unbalanced loads and secondary ground faults 8.1 Phase-to-neutral loads
31	8.2 Phase-to-phase loads
32	8.3 Secondary faults
33	9. Ferroresonance 9.1 Qualitative description
34	9.2 Transformer connections highly susceptible to ferroresonance
36	9.3 Measures to minimize the probability of ferroresonance with ungrounded primary connection
37	9.4 Transformer connections least susceptible to ferroresonance
39	9.5 Measures to minimize the probability of ferroresonance with grounded primary connections 10. Unsymmetrical banks and special connections 10.1 T-connected
40	10.2 Circulating delta currents
41	10.3 Grounded delta secondary
42	10.4 Open-delta secondary
43	10.5 Open-Y primary to four-wire 208 V service 10.6 Effect on voltage balance
44	Annex A (informative) Bibliography
46	Back cover