Practical values of power factor: Difference between revisions
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{{Menu_Power_Factor_Correction}} | {{Menu_Power_Factor_Correction}} | ||
== Average power factor values for the most commonly-used equipment and appliances == | == Average power factor values for the most commonly-used equipment and appliances == | ||
(see | (see {{FigRef|L7}}) | ||
{| class="wikitable" | {{tb-start|id=Tab1331|num=L7|title=Values of cos φ and tan φ for commonly-used equipment|cols=4}} | ||
{| class="wikitable" | |||
|- | |||
! colspan="4" | Equipment and appliances || cos φ || tan φ | |||
|- | |||
| rowspan="5" | Motor | |||
| rowspan="5" |Common induction motor | |||
| rowspan="5"| loaded at || 0 % || 0.17 || 5.80 | |||
|- | |||
| 25% || 0.55 || 1.52 | |||
|- | |||
| 50 % || 0.73 || 0.94 | |||
|- | |||
| 75 % || 0.80 || 0.75 | |||
|- | |||
| 100 % || 0.85 || 0.62 | |||
|- | |||
| rowspan="4" |Lamps | |||
| colspan="3" |Incandescent lamps | |||
| 1.0 || 0 | |||
|- | |||
| colspan="3" |Fluorescent lamps (uncompensated) | |||
| 0.5 || 1.73 | |||
|- | |||
| colspan="3" |Fluorescent lamps (compensated) | |||
| 0.93 || 0.39 | |||
|- | |||
| colspan="3" |Discharge lamps | |||
| 0.4 to 0.6 || 2.29 to 1.33 | |||
|- | |||
| rowspan="3" |Ovens | |||
| colspan="3" |Ovens using resistance elements | |||
| 1.0 || 0 | |||
|- | |- | ||
| colspan="3" |Induction heating ovens (compensated) | |||
| 0.85 || 0.62 | |||
|- | |- | ||
| | | colspan="3" |Dielectric type heating ovens | ||
| 0.85 || 0.62 | |||
|- | |||
| | | rowspan="4" |Welding | ||
| | | colspan="3" |Resistance-type soldering machines | ||
0 | | 0.8 to 0.9 || 0.75 to 0.48 | ||
| | |||
0. | |||
0. | |||
0. | |||
| | |||
0.75 | |||
0. | |||
|- | |- | ||
| | | colspan="3" |Fixed 1-phase arc-welding set | ||
| 0.5 || 1.73 | |||
| | |||
| | |||
| | |||
|- | |- | ||
| | | colspan="3" |Arc-welding motor-generating set | ||
| 0.7 to 0.9 || 1.02 to 0.48 | |||
| | |||
| | |||
| | |||
|- | |- | ||
| | | colspan="3" |Arc-welding transformer-rectifier set | ||
| 0.7 to 0.8 || 1.02 to 0.75 | |||
| | |||
| | |||
|- | |- | ||
| | | colspan="4" |Arc furnace | ||
|0.8 | |||
|0.75 | |||
| 0.8 | |||
| 0.75 | |||
|} | |} | ||
Latest revision as of 09:49, 22 June 2022
Average power factor values for the most commonly-used equipment and appliances
(see Fig. L7)
Fig. L7 – Values of cos φ and tan φ for commonly-used equipment
| Equipment and appliances | cos φ | tan φ | |||
|---|---|---|---|---|---|
| Motor | Common induction motor | loaded at | 0 % | 0.17 | 5.80 |
| 25% | 0.55 | 1.52 | |||
| 50 % | 0.73 | 0.94 | |||
| 75 % | 0.80 | 0.75 | |||
| 100 % | 0.85 | 0.62 | |||
| Lamps | Incandescent lamps | 1.0 | 0 | ||
| Fluorescent lamps (uncompensated) | 0.5 | 1.73 | |||
| Fluorescent lamps (compensated) | 0.93 | 0.39 | |||
| Discharge lamps | 0.4 to 0.6 | 2.29 to 1.33 | |||
| Ovens | Ovens using resistance elements | 1.0 | 0 | ||
| Induction heating ovens (compensated) | 0.85 | 0.62 | |||
| Dielectric type heating ovens | 0.85 | 0.62 | |||
| Welding | Resistance-type soldering machines | 0.8 to 0.9 | 0.75 to 0.48 | ||
| Fixed 1-phase arc-welding set | 0.5 | 1.73 | |||
| Arc-welding motor-generating set | 0.7 to 0.9 | 1.02 to 0.48 | |||
| Arc-welding transformer-rectifier set | 0.7 to 0.8 | 1.02 to 0.75 | |||
| Arc furnace | 0.8 | 0.75 | |||
