Chapter 25: General 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-25 |
| Location | lines 23643-23780 |
| Status | candidate |
| Word Count | 657 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 4 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER XXV. GENERAL POLYPHASE SYSTEMS. 260. A polyphase system is an alternating-current sys- tem in which several E.M.Fs. of the same frequency, but displaced in phase from each other, produce several currents of equal frequency, but displaced phases. Thus any polyphase system can be considered as con- sisting of a number of single circuits, or branches of the polyphase system, which may be more or less interlinked with each other. In general the investigation of a polyphase system is carried out by treating the single-phase branch circuits independently. Thus all the discussions on generators, synchronous motors, induction motors, etc., in the preceding chapters, apply to single-phase systems as well as polyphase systems, in the latter case the total power being the sum of the powers of the individual or branch circuits. If the polyphase systemSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Alternating current
Section titled “Alternating current”CHAPTER XXV. GENERAL POLYPHASE SYSTEMS. 260. A polyphase system is an alternating-current sys- tem in which several E.M.Fs. of the same frequency, but displaced in phase from each other, produce several currents of equal frequency, but displaced phases. Thus any polyphase system can be considered as con- sisting of a number of single circuits, or branches of th ...Radiation / light
Section titled “Radiation / light”CHAPTER XXV. GENERAL POLYPHASE SYSTEMS. 260. A polyphase system is an alternating-current sys- tem in which several E.M.Fs. of the same frequency, but displaced in phase from each other, produce several currents of equal frequency, but displaced phases. Thus any polyphase system can be considered as con- sisting of a number of single circuits, or branches of the polyphase system, which may be more or less interlinke ...Waves / transmission lines
Section titled “Waves / transmission lines”... uarter-phase system, consisting of two equal E.M.Fs. displaced by 90°, or one-quarter of a period, is an unsymmetrical system. 261. The flow of power in a single-phase system is pulsating ; that is, the watt curve of the circuit is a sine GENERAL POLYPHASE SYSTEMS, 431 wave of double frequency, alternating between a maximum value and zero, or a negative maximum value. In a poly- phase system the watt curves of the different branches of the system are pulsating also. Their sum, however, or the total flow of power of the system, may be either con ...Chapter-Local Concept Hits
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Chapter-Local Glossary Hits
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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-181 | vidual branches both systems become unbalanced systems. Fig. 181. Fig. 182. | line 23698 |
theory-calculation-alternating-current-phenomena-1900-fig-182 | Fig. 181. Fig. 182. The different branches of a polyphase system may be either independent from each other, that is, without any | line 23701 |
theory-calculation-alternating-current-phenomena-1900-fig-183 | four collector rings, as shown diagrammatically in Fig. 183, Fig. 183. is an interlinked system also. The four-wire quarter-phase system produced by a generator with two indepen… | line 23726 |
theory-calculation-alternating-current-phenomena-1900-fig-184 | r Fig. 184. 262. Thus, polyphase systems can be subdivided into : Symmetrical systems and unsymmetrical systems. | line 23742 |
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Alternating current: Compare Steinmetz’s AC language with modern sinusoidal steady-state analysis, RMS quantities, phase, and phasor notation.
- Radiation / light: Compare the chapter’s radiation vocabulary with modern electromagnetic radiation, spectral frequency, wavelength, absorption, and illumination engineering.
- Waves / transmission lines: Map Steinmetz’s wave and line language onto modern distributed constants, propagation velocity, standing waves, and reflections.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- Radiation / light: Radiation and wave language can invite ether-field comparison, but source wording, modern radiation theory, and speculative synthesis must stay separated.
- Waves / transmission lines: Standing/traveling wave passages may support richer field interpretations; the page keeps those readings separate from verified Steinmetz wording.
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