| Load Frequency Characteristics (Con td..) |
Typical values for various loads are given below:
|
|
Component
|
Power factor
|
k_{pv}
|
k_{qv}
|
k_{pf}
|
k_{qf}
|
Refrigerator |
0.80 |
0.77 |
2.5 |
0.53 |
-1.5 |
Incandescent lights |
1.00 |
1.55 |
0.0 |
0.00 |
0.0 |
Fluorescent lights |
0.90 |
0.96 |
7.4 |
1.00 |
-2.8 |
Industrial motors |
0.88 |
0.07 |
0.5 |
2.50 |
1.2 |
Fan motors |
0.87 |
0.08 |
1.6 |
2.90 |
1.7 |
Agricultural pumps |
0.85 |
1.40 |
1.4 |
5.00 |
4.0 |
Arc furnace |
0.70 |
2.30 |
1.6 |
-1.00 |
-1.0 |
Transformer
(unloaded) |
0.64 |
3.40 |
11.5 |
0.00 |
-11.8 |
|
We now consider an example to show how the parameters of an induction motor driven fan load can be obtained. |
