Chapter 29: Transformation Of Polyphase Systems
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theory and Calculation of Alternating Current Phenomena |
| Year | 1900 |
| Section ID | theory-calculation-alternating-current-phenomena-1900-chapter-29 |
| Location | lines 24805-25135 |
| Status | candidate |
| Word Count | 1338 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 7 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER XXIX. TRANSFORMATION OF POLYPHASE SYSTEMS. 283. In transforming a polyphase system into another polyphase system, it is obvious that the primary system must have the same flow of power as the secondary system, neglecting losses in transformation, and that consequently a balanced system will be transformed again in a balanced system, and an unbalanced system into an unbalanced sys- tem of the same balance factor, since the transformer is an apparatus not able to store energy, and thereby to change the nature of the flow of power. The energy stored as magnetism, amounts in a well-designed transformer only to a very small percentage of the total energy. This shows the futility of producing symmetrical balanced polyphase systems by transformation from the unbalanced single-phase system without additional apparatus able to store energy efficiently, as revolvingSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Magnetism
Section titled “Magnetism”... ystem will be transformed again in a balanced system, and an unbalanced system into an unbalanced sys- tem of the same balance factor, since the transformer is an apparatus not able to store energy, and thereby to change the nature of the flow of power. The energy stored as magnetism, amounts in a well-designed transformer only to a very small percentage of the total energy. This shows the futility of producing symmetrical balanced polyphase systems by transformation from the unbalanced single-phase system without additional apparatus able to store energ ...Alternating current
Section titled “Alternating current”... he primary system must have the same flow of power as the secondary system, neglecting losses in transformation, and that consequently a balanced system will be transformed again in a balanced system, and an unbalanced system into an unbalanced sys- tem of the same balance factor, since the transformer is an apparatus not able to store energy, and thereby to change the nature of the flow of power. The energy stored as magnetism, amounts in a well-designed transformer only to a very small percentage of the total energy. This shows the futility of pr ...Complex quantities
Section titled “Complex quantities”... ON OF POLYPHASE SYSTEMS, 461 phases, as magnetic circuits of the two transformers, which induce the E.M.Fs., e and ?, per turn, by the law of paral- lelogram the E.M.Fs., Elf E^, . . . . can be dissolved into two components, El and Elt E^ and Ez, .... of the phases* "e and J. Then, - E!, £2, • • ' • are the counter E.M.Fs. which have to be- induced in the primary circuits of the first transformer;. Ev E2, .... the counter E.M.F.'s which have to be in- duced in the primary circuits of the second transformer.. hence EI 1 7, £2 1 J . . . . are ...Ether references
Section titled “Ether references”... 66 AL TERN A TING-CURRENT PHENOMENA. 8. The double Y connection of transformation from three-phase to six-phase, shown in Fig. 205. It is analo- gous to (7), the delta connection merely being replaced by the Y connection. The neutrals of the two F's may be connected together and to an external neutral if desired. 9. The double T connection of transformation from Fig. 205. three-phase to six-phase, shown in Fig. 206. Two trans- formers are used with two secondary coils which are T con- nected, but one with reversed terminals. This method al ...Chapter-Local Concept Hits
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| Ether | 1 | seeded |
Chapter-Local Glossary Hits
Section titled “Chapter-Local Glossary Hits”| Term Candidate | Hits In Section | Status |
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| ether | 1 | seeded |
Equation Candidates
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Figure Candidates
Section titled “Figure Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
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theory-calculation-alternating-current-phenomena-1900-fig-799 | mation between polyphase systems are : Fig. 799. 1. The delta -Y connection of transformers between three-phase systems, shown in Fig. 199. One side of the | line 24980 |
theory-calculation-alternating-current-phenomena-1900-fig-200 | V Fig. 200. three-phase secondary distributions. The Y connection of | line 24992 |
theory-calculation-alternating-current-phenomena-1900-fig-201 | system by the internal impedance of the transformers. Fig. 201. 3. The main and teaser, or T connection of trans- formers between three-phase systems, as shown in Fig. 201. | line 25015 |
theory-calculation-alternating-current-phenomena-1900-fig-202 | and connected with one of its ends to the center of the Fig. 202. other transformer. From the point £ inside of the teaser transformer, a neutral wire can be brought out in this… | line 25027 |
theory-calculation-alternating-current-phenomena-1900-fig-203 | ter-phase side of the transformers contains two equal and Fig. 203. independent (or interlinked) coils, the three-phase side two | line 25051 |
theory-calculation-alternating-current-phenomena-1900-fig-205 | 9. The double T connection of transformation from Fig. 205. three-phase to six-phase, shown in Fig. 206. Two trans- formers are used with two secondary coils which are T con- | line 25088 |
theory-calculation-alternating-current-phenomena-1900-fig-208 | 2’ v ’ Fig. 208. able to store energy, since the difference of power between | line 25115 |
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Magnetism: Track flux, reluctance, permeability, magnetizing force, and loss language against modern magnetic-circuit terminology.
- Alternating current: Compare Steinmetz’s AC language with modern sinusoidal steady-state analysis, RMS quantities, phase, and phasor notation.
- Complex quantities: Track how Steinmetz preserves geometric rotation and quadrature while translating the same operation into symbolic form.
- Ether references: Verify exact wording before drawing conclusions. Ether language must be separated from later interpretive systems.
- Impedance / reactance: Translate historical opposition terms into modern impedance, admittance, conductance, susceptance, and complex-plane notation.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- Magnetism: Centrifugal/divergent magnetic-field readings are interpretive overlays, not automatic historical claims.
- Ether references: If Steinmetz mentions ether, quote only the verified source words first; any broader ether-field synthesis belongs in a labeled interpretive layer.
Promotion Checklist
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