Example 13.7 Transformator

An ideal transformer is rated at 2400/120 V, 9.6 kVA, and has 50 turns on the secondary side. Calculate: (a) the turns ratio, (b) the number of turns on the primary side, and (c) the current ratings for the primary and secondary windings.

Step Down Trafo dengan 

$V_{1}=2400V, V_{2}=120V, S=I_{1}V_{1}=I_{2}V_{2}=9600VA, N_{2}=50$

Jawab
a) $n=\frac{V_{2}}{V_{1}}=\frac{120V}{2400V}=0.05$

b) $N_{1}=\frac{N_{2}}{n}=\frac{50}{0.05}=1000$

c)$I_{1}=\frac{9600VA}{2400V}=4A$ therfore $I_{2}=\frac{4A}{0.05}=80A$