Answer / baswaraj

The power ratio between Star to Delta is 1:3

Here is the Explanation:

Let?s suppose Vs be the supply voltage per phase.

So the line voltage of the supply will be ?3Vs.

Now assume any type of load; for simplicity assume it a
only resistive load.

And let it be ?R? per phase.



For Delta connected load:



Calculation for per phase power; PD= I2R



Where I ? load current (per phase)

And,

I = ?3Vs/R {as line voltage of the supply is directly
applied to the phase of the delta load}

So,

Pd = (?3Vs/R )2R = 3Vs2/R watts per phase.

For 3 phases:

P3D = 3Pd = 3*3Vs2/R = 9Vs2/R watts.



Now for Star connected load:



PS = I2R = (Vs/R)2R = Vs2/R watts

For 3 phases: P3S = 3PS = 3 Vs2/R watts



Conclusion:

P3S / P3D = 3Vs2/R / 9Vs2/R = 1/.

Define end float in a motor?

0 Answers  

---

what is the use of static frequency converter and static excitation equipment? and where it is employed? for what?

0 Answers   Toshiba,

---

Determine the BTU size of an aircon for 20 sq metre room

0 Answers  

---

What happens to a motor if it is connected in Delta connection

0 Answers  

---

what is the common earth

0 Answers  

---

what is the meaning of servo motor. In trains, what type of the motors we are using at the bottom of each compartment

5 Answers  

---

how df/dt relay operates & how it works?

1 Answers  

---

Where I can get the sample question for post of Junior engineer electrical-II For RRB Bhubaneswar.

0 Answers   Noida Power,

---

how much mininmum length required to conduct a DC Hipot Test on 33kV AC Cable with 45kV DC? Is it 20meter or Less then 20?

0 Answers   ABB,

---

why high voltage is reqiured or L.T. panels? what type of tests should be taken for electrical panels?

2 Answers  

---

what is speed of light?

8 Answers  

---

one cable insulation resistance 200 mega ohm. how find 250 meter cable resistance.

2 Answers   NTPC,

---