STAR DELTA STARTER ?? FULL EXPLAINED

ENGINEERING TECH
2 min readOct 1, 2021

Star/Delta ( Y — Δ ) is a one types of Starter.

The Y-D starting is a type of motor startup at reduced voltage which is useful to start the motor smoothly, without excessive mechanical stress and limiting the start-up currents. It is suitable for with Motors.

Which Type Useful ??

What is benefits of ( Y — Δ ) Starter ???

So Now, Finely Starter Used Mean….. A Motor Starting a Start time Without jerk, Without Starting High current/Over current.

It’s Main used :- For a motor starting Current Limiting.

Starting current is reduced 3–4 times of the direct current due to which voltage drops and hence it causes less losses.

  • Star/delta ( Y — Δ ) circuit comes in circuit first during starting of motor, which reduces voltage 3 times, that is why current also reduces up to 3 times and hence less motor burning is caused.
  • The operation of the Star/delta method is simple and rugged.
  • It is relatively cheap compared to other reduced voltage methods.
  • Good Torque/Current Performance.
  • The components require very little space.
  • The most significant advantage of using Star/delta starting is the huge reduction in the starting current of the motor, which will result in a significant cost saving on cables, transformers and switch gear.

Wiring Diagram of Motor ( Y — Δ ) Starter

Motor Star-Delta Starter Selection of Component Rating Chart

Schematic Diagram of Star-Delta ( Y — Δ ) Starter

Now, We are known About this Function.

Thanks For read……..

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ENGINEERING TECH

Electrical maintenance engineer at ( Voltasbeko + koc + TATA GROUP + Archelik ) in sanand Gujarat Electrical Engineer work at Maruti Suzuki real experience.