Apparatus Subsection 100: Alternating-current Transformer: Lighting Only
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theoretical Elements of Electrical Engineering |
| Year | 1915 |
| Section ID | theoretical-elements-electrical-engineering-section-100 |
| Location | lines 17428-17537 |
| Status | candidate |
| Word Count | 194 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”B. LIGHTING ONLY I II Time Load = Percent. Time X load Losses Time X losses Losses Time X losses 2hr. IK 125 250 4.10 8.20 3.54 7.08 2hr. H 75 150 2.11 4.22 2.55 5.10 20 hr. Mo 5 100 1.00 20.00 2.00 40.00 S = 500 32.42 52.18 Input 532.42 552.18 Per cent, loss 6.11 9 . 45 Per cent, efficiency 93 .89 90 . 55 As seen, while I and II have the same full-load efficiency, 97.1 per cent., I, the low core-loss type, gives a much higher all-day efficiency, the more so the shorter the time of heavy load, that is, is far preferable for general distribution, as "lighting transformer." Inversely, in large power transformers in transmission systems, the high partial load efficiency of the low core-loss type is of lessSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Radiation / light
Section titled “Radiation / light”B. LIGHTING ONLY I II Time Load = Percent. Time X load Losses Time X losses Losses Time X losses 2hr. IK 125 250 4.10 8.20 3.54 7.08 2hr. H 75 150 2.11 4.22 2.55 5.10 20 hr. Mo 5 100 1.00 20.00 2.00 40.00 S ...Alternating current
Section titled “Alternating current”... ciency of the low core-loss type is of less importance, as such transformers are usually not run at partial load, but with a decrease of load on the system, transformers and generators are cut out and the remaining ones kept loaded. Of ALTERNATING-CURRENT TRANSFORMER 285 importance, however, is low i2r loss. Under emergency conditions requiring overloading of some transformer, the increased loss is all in the copper, and the less therefore the i2ry the less is the danger of destruction ...Transients / damping
Section titled “Transients / damping”... however, is low i2r loss. Under emergency conditions requiring overloading of some transformer, the increased loss is all in the copper, and the less therefore the i2ry the less is the danger of destruction by overheating in a case of a temporary overload. Thus the low izr loss type of transformer is preferable for large power units.Chapter-Local Concept Hits
Section titled “Chapter-Local Concept Hits”| Concept Candidate | Hits In Section | Status |
|---|---|---|
| Light | 2 | seeded |
Chapter-Local Glossary Hits
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| No chapter-local term hits yet | - | - |
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Radiation / light: Compare the chapter’s radiation vocabulary with modern electromagnetic radiation, spectral frequency, wavelength, absorption, and illumination engineering.
- Alternating current: Compare Steinmetz’s AC language with modern sinusoidal steady-state analysis, RMS quantities, phase, and phasor notation.
- Transients / damping: Separate the temporary term from the final steady-state term and compare with differential-equation response language.
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.
- Transients / damping: Transient collapse, impulse, and surge behavior can be compared with alternative field language, but only as a clearly marked reading.
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