List any four advantages of 3-phase systems over 1 -phase systems.

List any four advantages of 3-phase systems over 1 -phase systems.
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2 Answers

Answer :

Advantages of 3-phase supply over 1-phase supply:

1. More output:- For the same size output of poly-phase machines is always higher than single phase machines. 2. Smaller size:- For producing same output the size of three phase machines is always smaller than that of single phase machines. 3. More power is transmitted:- It is possible to transmit more power using a three phase system than single system. 4. Smaller cross-sectional area of conductors:- For the same amount of power is transmitted then the cross-sectional area of the conductors used for three phase system is small as compared to that of single phase system. 5. Better power factor:- Power factor of three phase machines is better than that of single phase machines. 6. Power delivered by a single phase system fluctuates whereas for three phase system power delivered to the load is the same at any instant.

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Answer :

.if you miss one phase u get the remaining two

.3phase machines are an added advantage

. expensive but reliable

.More output

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