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Published: 8 August 2011
Category: News
This section contains general information about the main physical and electrical engineering formulas. These notions are necessary for a correct interpretation of the tables in other sections.
| Topic | Formula | Image Formula | Power system | Picture Power system | Picture caption |
| Impedance | Resistance of a conductor at the temperature 0 |
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| - |
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| Impedance | Conductance of a conductor to annealing 0 |
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| - |
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| Impedance | Resistivity of a conductor at the temperature 0 |
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| - |
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| Impedance | Capacitive reactance |
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| - |
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| Impedance | Inductive reactance |
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| - |
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| Impedance | Impedance |
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| - |
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| Impedance | Form impedance |
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| - |
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| Impedance | Phase impedance |
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| - |
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| Impedance | Conductance |
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| - |
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| Impedance | Capacitive susceptance |
)
| - |
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| Impedance | Inductive susceptance |
)
| - |
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| Impedance | Admittance |
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| - |
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| Impedance | Form dell'ammettenza |
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| - |
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| Impedance | Phase dell'ammettenza |
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| - |
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| Impedance | Impedances in series |
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| - |
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| Impedance | Admittances in series |
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| - |
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| Impedance | Impedances in parallel |
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| - |
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| Impedance | Admittances in parallel |
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| - |
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| Impedance | Transformation star-triangle and triangle-star |
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| - |
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| Two-winding transformers | Rated current |
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| - |
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| Two-winding transformers | Short-circuit power |
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| - |
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| Two-winding transformers | Short circuit current |
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| - |
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| Two-winding transformers | Longitudinal Impedance |
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| - |
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| Two-winding transformers | Longitudinal strength |
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| - |
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| Two-winding transformers | Longitudinal reactance |
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| - |
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| Three-winding transformers | Three-winding transformers |
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| - |
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| Voltage drop and power | Voltage drop |
)
| Single phase |
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| Voltage drop and power | Drop tensionepercentuale |
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| Single phase |
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| Voltage drop and power | Active power |
)
| Single phase |
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| Voltage drop and power | Reactive power |
)
| Single phase |
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| Voltage drop and power | Apparent power |
)
| Single phase |
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| Voltage drop and power | Power factor |
)
| Single phase |
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| Voltage drop and power | Joule losses |
)
| Single phase |
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| Voltage drop and power | Voltage drop |
)
| Three-phase |
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| Voltage drop and power | Drop tensionepercentuale |
)
| Three-phase |
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| Voltage drop and power | Active power |
)
| Three-phase |
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| Voltage drop and power | Reactive power |
)
| Three-phase |
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| Voltage drop and power | Apparent power |
)
| Three-phase |
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| Voltage drop and power | Power factor |
)
| Three-phase |
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| Voltage drop and power | Joule losses |
)
| Three-phase |
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| Voltage drop and power | Voltage drop |
)
| Direct current |
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| Voltage drop and power | Drop tensionepercentuale |
)
| Direct current |
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| Voltage drop and power | Active power |
)
| Direct current |
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| Voltage drop and power | Reactive power |
| Direct current |
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| Voltage drop and power | Apparent power |
| Direct current |
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| Voltage drop and power | Power factor |
| Direct current |
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| Voltage drop and power | Joule losses |
)
| Direct current |
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