Answer / baljinder singh

There is starter used for A.C. motor, according to
rating,the rating and starter used for A.C. motor give as
follow-

1 hp to 5 hp ----- only D.O.L. starter
6 hp to 20 hp ----- star-delta starter
more than 20 hp ---- auto transformer starter

Answer / vimi thomas

Starter selection can be taken in accordance with the Motor HP rating.ie,
1. For 1HP - 5HP Motor :- DOL Starter can be used.
2. For 5HP - 20HP Motor :- Star Delta Starter can be used.
3. For 20 HP & above :- Auto Transformer Stater can be used.

Answer / virender s negi

For a 25 HP Induction motor one should use the star delta
starter. During the starting the motor draws 5 to 7 times
its normal current rating due to high inertia of its
armature. In the star circuit the Il=Tph as a result the
current is high. Its like moving a startionary object from
its position we require high force.

Pls add more.

Answer / ansarelectrapower

UPTO 5HP DOL STARTERS USED ABOVE 5 HP STAR DELTA SARTER IS
USED BECUASE IT LIMIT THE STARTING CURENT

Answer / umesh joshi

Star Delta starter should ba used, because motor draws high
current in starting so we used motor should be in star and
after sometimes it is in delta so that that motor is ni
safe position

Answer / bijayananda

auto transformer stater

Answer / satya dev

Above than 10 Hp motor Only star delta starter can be used.

how to calculate energy meter multipling factor by ct & pt raitio

2 Answers  

I WANT TO know WHICH WAY IS BETTER FOR CONNECTION BETWEEN POWER TRANSFORMER AND MAIN DISTRIBUTION PANEL. 1-IS BETTER WE USE CABLE? 2-IS BETTER WE USE BUS DUCT? my transformer rate power is 2500KVA

1 Answers  

What is an Air COmpressor

0 Answers   DLF,

How to decide the rating of CBCT? We have 6.6Kv switchgear & having 50/1 cbct ,i want to know how this 50/1 A came? On what basis we decide CBCT reting?

1 Answers   Cross,

how would you come to know if a transformer is double wound or auto? note that there is no tag. you are given only a multimeter.

5 Answers  

1.how to calculate energy units in our home at singe phase, 2.415V,63A wiring what will use thickness of wire

2 Answers  

What is a signal flow graph?

0 Answers  

why lightning arrester and other equipment earthing conneting from same earth bar ?

1 Answers  

What is difference between 220v/50Hz & 120V/60Hz?

8 Answers  

How many types of relay are present in a VCB and ACB, what are the tests we can conduct on both breakers and how to set the relays values

2 Answers   Hyundai, Sodexo,

There is two transformers of 2MVA & 3MVA, which transformer is located at the sending end & which is at receiving end. why?

3 Answers  

How multimeter shows phase to phase voltage 440V & phase to neutral 220V.

2 Answers