Chapter 32: 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 | 1916 |
| Section ID | theory-calculation-alternating-current-phenomena-chapter-32 |
| Location | lines 36062-36514 |
| Status | candidate |
| Word Count | 2126 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 8 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER XXXII TRANSFORMATION OF POLYPHASE SYSTEMS 289. In transforming one polyphase system into another poly- phase system, it is obvious that the primary system must have the same flow of energy as the secondary system, neglecting losses in transformation, and that consequently a balanced sys- tem will be transformed again into a balanced system, and an unbalanced system into an unbalanced system of the same bal- ance-factor, since the transformer is not able to store energy, and thereby to change the nature of the flow of energy. The energy stored as magnetism amounts in a well-designed trans- former 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 effi- ciently, asSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Impedance / reactance
Section titled “Impedance / reactance”... ine capacity. For instance, if only one phase of the secondary triangle is 426 ALTERNATING-CURRENT PHENOMENA loaded, the other two unloaded, the primary current of the loaded phase must return over the other two transformers, which, at open secondaries, act as very high reactances, thus limiting the current and consuming practically all the voltage, and the loaded primary, and thus its secondary, receive practically no voltage. Y-delta connection is satisfactory if the secondary load is balanced, as induction — or synchronous motors, or if the prim ...Magnetism
Section titled “Magnetism”... lanced sys- tem will be transformed again into a balanced system, and an unbalanced system into an unbalanced system of the same bal- ance-factor, since the transformer is not able to store energy, and thereby to change the nature of the flow of energy. The energy stored as magnetism amounts in a well-designed trans- former 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 ener ...Alternating current
Section titled “Alternating current”... imary system must have the same flow of energy as the secondary system, neglecting losses in transformation, and that consequently a balanced sys- tem will be transformed again into a balanced system, and an unbalanced system into an unbalanced system of the same bal- ance-factor, since the transformer is not able to store energy, and thereby to change the nature of the flow of energy. The energy stored as magnetism amounts in a well-designed trans- former only to a very small percentage of the total energy. This shows the futility of producing symm ...Dielectricity / capacity
Section titled “Dielectricity / capacity”... nection of step-up transformers is frequently used in long-distance transmissions, to allow grounding of the high-potential neutral. Under certain conditions — which there- fore have to be guarded against — it is liable to induce excessive voltages by resonance with the line capacity. J_I_i P^^lIM nm Fig. 210. The reverse thereof, or the Y-delta connection, is undesirable on unbalanced load, since it gives what has been called a "float- ing neutral;" the three primary Y voltages do not remain even approximately constant, at unequal distribut ...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 |
|---|---|---|
theory-calculation-alternating-current-phenomena-fig-210 | nm Fig. 210. The reverse thereof, or the Y-delta connection, is undesirable on unbalanced load, since it gives what has been called a “float- | line 36262 |
theory-calculation-alternating-current-phenomena-fig-211 | T Fig. 211. and (3) can be operated in parallel with each other, and with the | line 36354 |
theory-calculation-alternating-current-phenomena-fig-212 | mm) mu Fig. 212. by the internal impedance of the transformers. It is convenient | line 36370 |
theory-calculation-alternating-current-phenomena-fig-213 | 1 Fig. 213. phase and inverted three-phase or polyphase monocychc, by two transformers, the secondary of one being reversed regarding its | line 36404 |
theory-calculation-alternating-current-phenomena-fig-214 | CMT\ rWFl Fig. 214. of the transformers contain two equal and independent (or inter- linked) coils, the three-phase sides two coils with the ratio of | line 36420 |
theory-calculation-alternating-current-phenomena-fig-215 | I 2 Fig. 215. ‘3 ‘2 ‘3 | line 36448 |
theory-calculation-alternating-current-phenomena-fig-216 | formation from three-phase to six-phase, shown in Fig. 216. It Fig. 216. is analogous to (7), the delta connection merely being replaced | line 36458 |
theory-calculation-alternating-current-phenomena-fig-217 | I I Fig. 217. The primaries in 9 and 10 may be connected either delta or F, | line 36487 |
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Impedance / reactance: Translate historical opposition terms into modern impedance, admittance, conductance, susceptance, and complex-plane notation.
- 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.
- Dielectricity / capacity: Check whether the passage treats capacity, condensers, displacement, or dielectric stress as field storage rather than only circuit algebra.
- Ether references: Verify exact wording before drawing conclusions. Ether language must be separated from later interpretive systems.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- Magnetism: Centrifugal/divergent magnetic-field readings are interpretive overlays, not automatic historical claims.
- Dielectricity / capacity: A Wheeler-style reading may emphasize dielectric compression, field stress, and stored potential, but this page treats that as interpretation unless Steinmetz explicitly says it.
- Ether references: If Steinmetz mentions ether, quote only the verified source words first; any broader ether-field synthesis belongs in a labeled interpretive layer.
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