A transformer supplying electrical energy to a factory changes the 11 000 V a.c. supply to 440 V a.c. for use in the factory. The current in the secondary coil is 200 A.

Calculate the current in the primary coil, assuming no losses from the transformer.

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Solution

(Np/Ns) = (Vp/Vs) =(Is/Ip)

Vp=11000V
Vs=440V
Is=200A

Ip=(Vs.Is)/Vp
=(440×200)/11000
=88000/11000=8A.

Current in primary coil is 8A.

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A transformer supplying electrical energy to a factory changes the 11 000 V a.c. supply to 440 V a.c. for use in the factory. The current in the secondary coil is 200 A. Calculate the current in the primary coil, assuming no losses from the transformer.

(Np/Ns) = (Vp/Vs) =(Is/Ip) Vp=11000V Vs=440V Is=200A Ip=(Vs.Is)/Vp =(440×200)/11000 =88000/11000=8A. Current in primary coil is 8A.

A transformer supplying electrical energy to a factory changes the 11 000 V a.c. supply to 440 V a.c. for use in the factory. The current in the secondary coil is 200 A.

Calculate the current in the primary coil, assuming no losses from the transformer.

(Np/Ns) = (Vp/Vs) =(Is/Ip)

Vp=11000V
Vs=440V
Is=200A

Ip=(Vs.Is)/Vp
=(440×200)/11000
=88000/11000=8A.

Current in primary coil is 8A.