The type of connection generally used at the beginning of high tension transmission line is - (a) delta-delta (b) Start-star (c) star-delta (d) delta-star

By Ritesh|Updated : October 31st, 2022

The type of connection generally used at the beginning of high tension transmission line is delta-star. There is a very high voltage at the secondary side at the start of the high-tension transmission line. By utilizing a step-up transformer, this is accomplished. The primary side of the high-tension transmission line is a low voltage at the starting, and the secondary side has a high voltage.

  • Delta and star connections are ideal on the primary and secondary sides for this use.
  • because the line voltage is three times the phase voltage in a star connection.
  • As a result, insulating costs are reduced. Additionally, the price of insulation for the entire transmission line is decreased.

Type of Connection

Below are listed various connections and their corresponding transformers.

Connections

Applications

Delta primary, Delta Secondary

Low-power primary distribution

Star primary, Delta Secondary

Step down transformer

Delta primary, Star secondary

Step-up transformer

Star primary, Star secondary

Small high-voltage transformers

Mistake points

The secondary side connection also offers a reliable neutral point for loads in the secondary distribution network, making the delta-star connection the most cost-effective for step-up applications (transmission side). Both step-down (distribution side, low voltage) and step-up (transmission side, high voltage) applications are common in which the connector is used.

Summary:

The type of connection generally used at the beginning of high tension transmission line is - (a) delta-delta (b) Start-star (c) star-delta (d) delta-star

The delta-star connection type is typically utilized at the start of a high-tension transmission line. This is done by utilizing a step-up transformer. The beginning of the high-tension transmission line's primary side has low voltage, whereas the secondary side has high voltage.

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