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Why do we use star connection on transmission and distribution on delta?

Why do we use star connection on transmission and distribution on delta?

Answer:

The star connection is mainly required for the Power Transmission Network

for longer distances, whereas in delta connection mainly in Distribution networks and is used for shorter distances.

For long-distance transmission and distribution, star connection is preferred because it requires little insulation and has a neutral that helps to balance the circuit.

Delta connections require more insulation and have issues with unbalanced currents, hence they are preferable for transmission and distribution over shorter distances.

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