Page 572 - Basic Electrical Engineering

Figure 6.22

Given V = 230 V.
1

The induced EMF in the primary windings is E . E is slightly less than V 1
1
1
because there will be some voltage drop in the winding.
V > E , V − E = Voltage drop in the primary winding due to current,
1
1
1
1
I flowing through it.
0
The no-load current, I is very small as compared to the current that would
0
flow when some electrical load is connected across the secondary winding.
Here, the transformer is on no-load, i.e., no load has been connected to its
secondary winding.
If we neglect the no-load voltage drop in the winding, we can write V =
1
E .
1

E = 4.44 ϕ f N 1
m
1

and

E = 4.44 ϕ f N 2
2
m

therefore,