Star to Star Transformer connection:

This Diagram shows Star to Star Transformer connection. In this circuit, we use two electric transformers. This circuit diagram is very simple and easy to make. If you want to know more details about this circuit please check our youtube video below the post. Please stay with our website for more updates about electrical electronics and robotics projects gadgets and circuits.


Star to Star Transformer connection:

Star to Star Transformer connection

Components needed For this Project:

You can get the components from any of the sites below:

  1. Single Phase Transformer [See Buy Click Amazon]

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Components used to make the (Star to Star Transformer connection:

01. Electric Transformer:

The primary voltage of the transformer is 11 KV and the secondary is 0.4 KV high voltage. This is a delta star transformer, the high voltage of this transformer uses a delta connection and the low voltage uses a star connection.11KV power transformers are commonly used in power transmission substations to step down high-voltage transmission to distribution levels. 11KV transformers are more often used in distribution substations and on utility poles to further step-down voltage for supply.

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Frequently asked questions

Why are star-star connected transformers rarely used?

This connection considerably generates interference with the communication lines hence with this connection configuration, telephone lines cannot be run in parallel. Due to these disadvantages, the star-star connection was rarely used and not employed in practice.

What are the disadvantages of a star-to-star connection?

If the neutral connection is not provided or an unbalanced load is connected, then the phase voltages tend to become severely unbalanced. Thus, the star-star connection was not satisfactory for the unbalanced loading in the absence of the neutral connection.

What do you connect to the star point of the transformer?

The low voltage side of a 3-phase distribution transformer was star-connected. This star point forms the neutral of the LV system and would be solidly connected to Earth at all times. For the single-phase transformers, one terminal would be designated as the neutral point and would again be solidly connected to Earth.

Why is the star connection important?

Generally, a star connection is used where you need a neutral and two separate voltages, like our distribution system. Delta connection is generally preferred where the neutral conductor is not needed like for transmission of high-voltage power.

What is the voltage in the star connection?

The voltage in star wiring is √3 higher than in the delta wiring, i.e. a motor specified as the 40S has a nominal voltage of 400 V in star wiring or 400 V or √3 = 230 V in delta wiring, a motor specified as 70S has been a nominal voltage of approx. 690 V in star wiring and 690 V or √3 = 400 V delta wiring.

Read more Single Phase Wiring


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