What is the advantage of using a star delta...

What is the advantage of using a star delta...

Question 1 of 270705eccefa4bacbc34ba4d483ab

What is the advantage of using a star delta starter?

Question 1 of 27070

Q

What is the advantage of using a star delta starter?

🔍 Key Concepts

• Star-delta starting reduces voltage to each phase during starting • Relationship between starting current, starting torque, and run-up time for induction motors • Practical goals of reduced-voltage starters on ships (protecting supply, but still getting the motor up to speed)

💭 Think About

• When a motor is connected in star instead of delta, what happens to the phase voltage and therefore the starting current? • If you reduce starting current too much, what effect might that have on how quickly the motor accelerates to full speed? • Among the options, which one best reflects a balanced compromise between limiting surge current and still achieving a practical start-up time?

✅ Before You Answer

• Remember that in star connection the line voltage is shared, so each winding sees a lower voltage than in delta. • Check which choice talks about both current reduction and the time to run up to speed, not just one or the other. • Eliminate any option that suggests no surge current at all or that the voltage is first increased above rated value, as these are not characteristics of star-delta starters.