what is ratio test?



what is ratio test?..

Answer / ajeet pratap singh(power palnt

Ratio test is performed in transformers, CT , PT to know the actual voltage ratio .
here we will explain about PT ratio test.

As we know that PT contain Primary winding (A1 _ A2) & its secondary is S1 & S2.

Now Connect A2 to earthing link.Take 220 V ac supply from external source.
Connect A1 to phase of 220v & connect earthing link to neutral of 220 v AC.
Now use multimeter in secondary side.If PT ratio is 132/110/1.732
Then in secondary side multimeter will read 0.196volt. If this value is not found then ratio test is not ok.& voltage ratio is improper.

Is This Answer Correct ?    1 Yes 0 No

Post New Answer

More Electrical Engineering Interview Questions

how to select cable size?

4 Answers  


Resistance of a conductor in a close electrical ckt is practically zero why?

1 Answers  


Which one hurts more AC or DC Current ?

10 Answers  


The neutral to earth connection in my industry is showing a zero reading (shorted). I have a machine which has to be installed where neutral to earth is not shorted and shows a leak voltage <3 Volts. Please suggest me how it is possible.

6 Answers  


What are the advantages of nichols chart?

0 Answers  






why the starting torque is high in dc series motor..

3 Answers   GM General Motors,


What is the need for a controller?

0 Answers  


How much resistance between neutral earthing and body earthing of Power transformer?

1 Answers  


how squirrel cage & slip ring motor works? how they differ from each other

1 Answers  


How to convert 2 phase to 3 phase electricpower in induction moter?

0 Answers   HCL,


lightning arrester rating selection procedure: (line to line voltage(kV)/(squ.root of 3))*squ.root of 2. now the question is, IS this above formula correct for both STAR and DELTA connected system???

1 Answers  


difference between converter and invertor

2 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5085)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4452)
  • Electrical Engineering Interview Questions Electrical Engineering (16636)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)