Electrical Engineering - Three-Phase Systems in Power Applications - Discussion

Discussion :: Three-Phase Systems in Power Applications - General Questions (Q.No.1)

1. 

In a three-phase system, the voltages are separated by

[A]. 45°
[B]. 90°
[C]. 120°
[D]. 180°

Answer: Option C

Explanation:

No answer description available for this question.

Siva said: (Feb 11, 2011)  
In 3ph power the phase angle b/w each ph in 120 deg elec.

Jinesh said: (Jul 15, 2011)  
One rotation of the waveform is 360 deg. So to balance each phase are displaced at 120 deg.

Gvk said: (Sep 15, 2011)  
In phasor representation of three phase supply the angle b/w each phase will be 120 deg.

Vinay said: (Sep 20, 2011)  
360/3 Degree phase is equal to 120 Degree.

Karthikeyan said: (Oct 1, 2011)  
Total phase angle is 360 so each of 120.

Murugesan said: (Dec 3, 2011)  
Phase difference in.

2 phase =90 degree, 4 phase=90 degree, 3 phase =120 degree.

Happy Grewal said: (Dec 12, 2011)  
The phase diff is same in 3 phase system so the phase diff is 360/3 Degree phase is equal to 120 Degree.

Nibha said: (Jan 11, 2012)  
Total=306 and for 3 phase angle the degree will be 360/3=120 degree.

Ankita said: (Feb 5, 2012)  
One cycle constitutes about 360 degrees angle. So to complete a cycle in a 3 phase individual phases are 120 degree apart from each other.

Sethupathi said: (Feb 6, 2012)  
In Three phase circuit angle between RYB phases are 120 degree.

Jitendranath Panda said: (Jun 27, 2012)  
In 3phase system total phase angle 360'.

So difference between two phase 360/3 = 120'.

Vinod Kumar said: (Sep 21, 2012)  
In 3phase system Totle phase angle is 360. So each have 120 degree.

Anil said: (Apr 5, 2013)  
Actually three phases are made 120 degree from per phases due to phase difference.

Saishekar said: (May 23, 2013)  
Single phase 360/1 = 360.

Two phase 360/2 = 180.

3 phase 360/3 = 120.

Jose said: (Jun 17, 2013)  
Cycle = 360 degree and 120 degree by phases.

Subhash Prajapat said: (Jul 6, 2013)  
Total 360. And for 3 phase angle the degree will be 360/3 = 120 degree.

Chhabila said: (Jul 11, 2013)  
In a balanced system the three phase voltages or currents separated by a phase difference of 120 degree.

Nithyashri said: (Aug 12, 2013)  
ANGLE B-R = 120.

ANGLE R-Y = 120.

ANGLE R-B = 120.

TOTAL = 360.

Naval said: (Jan 27, 2014)  
Three phase 360, So one phase 120.

Ramadevi said: (Feb 5, 2014)  
Each phase having 120 degree. Answer is C.

S.Hari said: (May 2, 2014)  
In alternator the three phase windings are set in 120 degrees displacement each other.

Aaron S Mulwanda said: (Aug 10, 2014)  
The phase difference in 3 phase power system is the same. A complete circle has 360deg. Therefore, the voltages are separated by 120deg, 360/3=120.

Hemanth said: (Sep 3, 2014)  
For the phase circuits other than 1 and 2. The phase angle can be calculated by using the formula "360/n".

Where "n" is the number of the phases.

In case of 2 - phase the angle is 90 degrees.

Rajiv Gandhi said: (Nov 5, 2014)  
Each phase placed on 120 degree phase angle.

Jagadish said: (Mar 14, 2015)  
In 3-phase s/m voltage are separate by 120.

Naresh said: (Nov 13, 2015)  
Total 3 phase 360 for each phase 120.

Dharmendra Kumar Singh said: (Jul 31, 2016)  
Total take complete in one rotation then formed 360 if division by 3 then come 120 so we take phase difference in three phase 120.

Mukesh Kumar Ghotra Bemoth said: (Nov 7, 2016)  
In three phase system the phase sequence with angle 120°.

G.Mounika said: (Nov 16, 2016)  
Nice answer with the clear explanation, Thank you all.

Rupesh Raaz said: (Dec 18, 2016)  
In 3-phase balaced s/s, the 3-phase are 120' part from each other.

Since, phase voltage are 120' appart to each other in a similarly mannar, the line voltage will be 120' appart to each other.

Shankar Yadav said: (Mar 10, 2017)  
Total RYB angle is 360.

360/3 then each phase is 120.

Siddu said: (Aug 29, 2017)  
Three phases are R Y B and they are differed by an angle of 120 degree.

Shadan said: (Mar 13, 2018)  
1phase =how many degree?

Shyam said: (Jan 30, 2019)  
In three phase, each phase is displaced in 120°s; elec.

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