What is the advantage of star star connection?

What is the advantage of star star connection?

Advantages of star connections: Each phase is a separate circuit. Dual voltage applications. Star connection can distribute the load evenly. Star connection alternator requires lesser insulation.

Why do we use star Delta transformer?

Advantages of Star Delta Connection The primary side is star connected. Hence fewer numbers of turns are required. This makes the connection economical for large high voltage step down power transformers. The neutral available on the primary can be earthed to avoid distortion.

What is the application of star star connection?

Application: This Type of Transformer is rarely used due to problems with unbalanced loads. It is economical for small high voltage transformers as the number of turns per phase and the amount of insulation required is less.

Why do we use star winding?

Advantage of STAR Connection of Generator Armature Winding: 1) STAR connection provides a neutral point. This neutral point is very important from the stability point of view of generator. Generally, the neutral point is grounded through NGR (Neutral Grounding Resistor).

Why is Star-Star Connection rarely used?

Thus harmonic phase voltages may be high in-shell type 3-phase transformers. The star-star connection is rarely used owing to the difficulties associated with the exciting current.

Why Star Connection is used in motor?

During starting the motor windings are connected in star configuration and this reduces the voltage across each winding 3. They are used in an attempt to reduce the start current applied to the motor during start as a means of reducing the disturbances and interference on the electrical supply.

Where is Star Delta used?

Star/Delta starters are probably the most common reduced voltage starters. They are used in an attempt to reduce the start current applied to the motor during start as a means of reducing the disturbances and interference on the electrical supply.

Why is Star-star connection rarely used?

What is star-star connection in 3 phase?

In the Star Connection, the similar ends (either start or finish) of the three windings are connected to a common point called star or neutral point. The three-line conductors run from the remaining three free terminals called line conductors.

Why alternator are star connected?

Alternators are connected primarily in star to achieve the following motives: Lesser stress on insulation and Copper saving: Voltage per phase is less for a given line voltage which reduces insulation requirement and this also reduces the number of turns hence copper is also saved.

Why star connection is used in motor?

What is the use of a star-star connected transformer?

The triangularly connected windings function the same on the primary side or on the secondary side. However, in order to save the insulating material, the star connection is always used on the high voltage side and the delta connection is used on the low voltage side.

What are the disadvantages of star-delta transformers?

Disadvantages of Star-Delta Connection In this type of connection, the secondary voltage is not in phase with the primary. Hence it is not possible to operate this connection in parallel with star-star or delta-delta connected transformer.

What happens when the star on a transformer is unbalanced?

If the load on the secondary side of the transformer is unbalanced, the phase voltages of load side change unless the load-star point is earthed. The difficulty of shifting neutral can be overcome by connecting the primary star point to the star point of the generator.

Why is the star-star connection rarely used?

The star-star connection is rarely used owing to the difficulties associated with the exciting current.