Answer / santosh

Three phase induction motor is a self starting motor where
as 1-phase cannot.

The reason is in order to intiate the roating action there
should be rotating flux .In single pahse you cannot have it

Answer / deepak thakur

visually defferance in 3 phase &1 phase motor
3 phase have 6 connecting terminal
1 phase have 2 connecting terminal

Answer / manish gupta

there is much difference in single phase induction motor and three phase induction motor. First,single phase induction motor is not self starting it requires some capacitor to create voltage difference to start.While three phase induction motor is self starting it do not require capacitor to start.
second single phase induction motor is used for small load eg. fan etc. while three phase induction motor for large load eg. lift,elevator etc.
third single phase induction motor uses less power while 3-phase induction motor uses much power.1-phase are smaller in size while 3-phase induction motor are bigger in size

for star delta connection,,why the contactor star not burn,when red,yellow and blue cable is looping.

2 Answers   Mahindra Water Utilities,

---

Do you know how to connect a motor of different H.Ps?

5 Answers  

---

How much ampere can withstand for 2sq mm c able?

2 Answers  

---

what is the difference between RCCB and ELCB?

3 Answers  

---

why the current is denoted by the letter 'i'

1 Answers  

---

what are the duty ratings in DG sets?

1 Answers   L&T,

---

what are the affects of loose connection in electrical circuit.

14 Answers   HP,

---

Three phase power is measured with two wattmeeter for balance three phase load.the reading of one wattmeter is zero.we can conclude that the power factor of balance load is?

1 Answers  

---

Why does the rotor rotate?

1 Answers   Machino Polymers, OPTCL,

---

What are the electrical engineer roles and responsibilities in chemical plant?

0 Answers  

---

difference between moore and mealy model

2 Answers   Google, IBM, TCS,

---

In a 3Ph induction motor(old) 6 wires came out from terminal & not mentioned u1,v1,w1,u2,v2 & w2. how can find out the terminals? how can connect to star delta starter??

1 Answers  

---