Page 845 - Basic Electrical Engineering
P. 845
Figure 11.25
Actual reading of the wattmeter, W considering the inductance of the
a
pressure coil
However, the desirable or true reading, W of the wattmeter which will occur
d
when there is no inductive effect of the pressure coil, i.e., when the pressure
coil circuit is purely resistive.
Therefore,
The ratio of the two wattmeter readings, i.e., W and W are
d
a
