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A "star-delta" starter- also known as a "Y-delta" or "wye-delta" starter - is used to reduce the voltage on the motor windings to only 1/.'/'3 [one divided by root 3] times the incoming line voltage, to help reduce mechanical stress and in-rush current at start-up.
More detail
Whenever you start a big heavy electric motor, you need to start it slowly to prevent the rotor overheating and drawing an enormous current. When the windings of a 3-phase motor are connected in STAR the voltage is reduced to a fraction equal to one over root three (1 / 1.732) times the normal running voltage that is used when it is connected in DELTA, resulting in a reduction of nearly one half the normal current.
Once the motor picks up speed, the connection is changed to DELTA so that the motor runs at full speed and torque from then on. It's a bit like using the gears of an automobile.
For more information please see the answers to the Related Questions shown below.
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What is the difference between a Y - delta starter and a star - delta starter?
No difference. Y is used as a symbol to indicate the star connection.
Which material are used in tube light starter?
Bi Metallic
Why starter used in DC motors?
starter is used in dc motor to reduce the initial starting torque...so that the dc machine could be protected from damage.... ..and to avoid max ..current flowing ..from it it can damage whole ..moter structure
Can a single pole switch replace a starter in fluorescent lamps?
No, a switch is used to control the circuit voltage that is applied to the fixture for turning the fixture on and off. The starter in the fluorescent fixture is used to start the current flowing through the filaments in the fixture's tubes. After a specific time, the starter heats up the circuit is opened and the current then flows through the fluorescent tubes.
Is 4 point starter used to start and control the speed of dc shunt motor with armature resistance control?
yes
Is soup consider a starter?
Yes, salad is often used as the starter course.
Can a single pole switch replace a starter in a fluorescent lamp?
No, a starter must be used.
Why the starter is used?
To start the engine
Why is starter used?
To start the engine
Where is the starter solenoid located on a 1995 Ford E350?
the solenoid on that year ford starter is on top of the starter itself. that starter is used on a wide variety of ford products.
What natural resources in Ontario can be used as fire starter?
Flint can be used as a fire starter, if you have some very dry tinder and a lot of patience.
Why DOL starter is used in industries in-spite it has disadvantages?
DOL starters are used in industries in-spite of its disadvantages because it is the simplest form of a motor starter. A DOL starter consists of a MCCB or circuit breaker, contactor, and an overload relay that is used for protection.
Can you use S10 in S2 starter?
An S2 starter is used when wiring 2 fluorescent tubes in series while S10 is used on a single tube
How much does a used 1997 Elantra starter cost?
I had to replace a starter in my 96 and it cost around $350.00
Where to find starter Pokémon by using poke rada?
The Poke Radar cannot be used to capture starter Pokemon. In general, the only way to get starter Pokemon is through picking your starter at the beginning of the game.
Where is the starter switch on a 2001 Daewoo leganza?
the starter solenoid is incorporated with the starter. you'll find two wires going to the starter. one is the control wire which actuates the contactor (starter solenoid) for the high amp circuit that drives the starter motor. and then there is the switch in the steering column that is used with the key.
Why is why a question starter?
Why is an adverb used to elicit an answer of reasoning.
