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

Discussion :: Three-Phase Systems in Power Applications - General Questions (Q.No.4)

4. 

In a certain three-wire Y-connected generator, the phase voltages are 2 kV. The magnitudes of the line voltages are

[A]. 2,000 V
[B]. 6,000 V
[C]. 666 V
[D]. 3,464 V

Answer: Option D

Explanation:

No answer description available for this question.

Chandana said: (Dec 10, 2010)  
Root 3 times phase voltage.

Anil said: (Apr 12, 2011)  
Phase voltage is 2000 volts.

So line voltage mutiply with root3 valu = 1.732.

2000*1.732=3, 464volts.

Bablu said: (May 23, 2011)  
Line voltage=root3 times of phase voltage.

Lavanya said: (Jun 17, 2011)  
Line voltage = (root 3 times) of phase voltage.

Saravana said: (Jul 12, 2011)  
Line voltage = root three times of phase voltage
=1.732*2000
=3,464volts

Siddu said: (Sep 13, 2011)  
In star connection line voltage equal to root 3 times of the phase voltage so answer is 2000*1.732=3464.

Vibha said: (Nov 30, 2011)  
vl=root 3 of vph

Shan said: (Dec 5, 2011)  
For Y(Star connection): Line Voltage=1.732* phase Voltage
For Delta connection: Line Voltage= Phase Voltage.
Accordingly,
=2000*1.732
=3464.10 volts...

Manohar Kr. Gaur said: (Dec 28, 2011)  
We know,
vl=root3*vph
then,vl=2000*1.732
=3464.10 volts

Gajendra Singh said: (Feb 11, 2012)  
WKT
V(line)=root3* V(Phase)
i.e.
V(line)=root3*2100
=3464.10volts

Ajakpogha Ferdinand O. said: (May 14, 2012)  
Vl=root3*Vph
= 1.7320*2000
= 3,464.1016V
where Vl=Line Voltage
Vph=Phase Voltage

Puni said: (Aug 27, 2012)  
What about in delta conn?

Chado said: (Dec 4, 2012)  
In wye connection: Line voltage = square root of 3 multiplied to Phase voltage while Line current = Phase current

In delta connection: Line current = square root of 3 multiplied to Phase current while Line voltage = Phase voltage

Venkidu said: (Jul 14, 2013)  
VL is equal to the Vph.

VL = root3*Vph.

= 1.732*2000.

= 3464.1016V.

Varadha Sit said: (Jul 14, 2013)  
VL= ROOT 3 INTO VP.

VP = 2KV = 2000V.

ROOT3 = 1.732.

VL = 1.732 [2000] = 3464.

Sanjay Verma said: (Nov 28, 2013)  
Line voltage = root three phase voltage, so 1.732*2000 = and is 3464.

Saleem Pasha said: (May 14, 2014)  
Line voltage = root3 times phase voltage.

Vishal said: (Aug 4, 2014)  
Why come 1.732 please answer I m not understand?

Arunpandiyan M said: (Aug 19, 2014)  
VL = 1.732*VPH.
VL = 1.732*2000.
VL = 3464.

Rajiv Gandhi said: (Nov 5, 2014)  
In a three phase system star connection line voltage is root of three so 2000kv multiply with root of three. It is right answer.

Sandeep Wasnik said: (Jan 17, 2015)  
vl = root three*vph.
= 1.73*2kv.
= 1.73*2000.
= 3460 volt.

Karthi said: (Feb 19, 2016)  
In a three phase system star connection line voltage is root of three. So 2000kv multiply with root of three.

In delta connection: Line current = Square root of 3 multiplied to Phase current while Line voltage = Phase voltage.

B.Teja Sri said: (May 7, 2016)  
In Three phase system star connection vl = root(3)Vph.

Given,

2kv = vph Where root(3) = 1.732.

vl = 2000 * 1.732 =3464.

Ranjan Gupta said: (Jul 17, 2016)  
2kv = vph root three * vph.
1.73 * 2000.
= 3460 VOLT.

Karna said: (Aug 27, 2016)  
In star connection line current = phase current,

Line voltage = 1/3 phase voltage.

And in delta connection line voltage = phase voltage,

Line current = root 3 phase voltage.

So, how is the answer 'd' correct?

By this star connection, the answer is 'c'. It's the right answer.

Musahak Khan said: (Jan 28, 2017)  
Phase voltage = 2000v.
So,line voltage = root3 * 2000 volt,
= 3464volt.

Musahak Khan said: (Jan 28, 2017)  
Phase voltage = 2000v.
So,line voltage = root3 * 2000 volt,
= 3464volt.

Musahak Khan said: (Jan 28, 2017)  
Phase voltage = 2000v.
So,line voltage = root3 * 2000 volt,
= 3464volt.

Siddu said: (Aug 29, 2017)  
Here, √ 3 * phase voltage.

Hussain Nuhaadh said: (Nov 20, 2017)  
1.7321 * 2000 = 3464.2.

Sunil said: (Aug 29, 2018)  
VL =1.732 Voh.
IL=Iph.

Himanshu Dakre said: (Sep 3, 2018)  
In star connected systems,
Line voltage is √3 phase voltage .
i.e. = 2000 * √3 .
Hence 3464 is the answer.

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