How to test the vector group of a Yd11 transformer? what are the relations to be checked between various vectors to confirm this vector group?

0 Answers  

---

Definition of grid?

7 Answers   L&T, Pace Power Systems, Vijai Electricals,

---

what are the sample questions asking to the test cunducting for electrical superwising lisence test?

0 Answers   APTransco,

---

Whether it is possible to measure energy at the input of rectifier transformer (12 pulse with very high odd harmonics)

0 Answers  

---

what are the specifications for Dc cables of higher rating

1 Answers   Reliance,

---

We have two Al.busbars each of size 125mm*10 mm connected in parallel.To increase the current rating ,can we connect third busbar of size 100mm*10mm in parallel to existing two busbars?In my opinion ,if we connect busbars of different sizes in parallel,then the busbar of lowest size will take much current.So this type of paralleling should be avoided .Am I correct?

1 Answers   PDP Steel,

---

what is deffrence between squirral cage and wound rotor in IM?

0 Answers   ME,

---

Sir we have 12.5 MVA(110/11KV) transformer (Y-Y) connected,which tripped showing earth fault,when we charged transformer it stood OK ,but on connecting 11 KV feeders it tripped showing earth fault.our service engineers found that the B phase and R phase phase connecting to neutral broken from HV OLTC(on load tap changer),and R phase and Neutral is ok.Dissolved gas analysis shows that accetline content is high,tan delta value is 12.My dout is it is an internal fault of transformer,why REF or diffrential relay is not acted?

1 Answers  

---

110 KW MOTER DOL STATER 240SQ.MM CABLE MOTER AND STARTER DISTANCE IS 110 METER WHAT IS VOTAGE IN MOTER END AND SYSTEM VOTAGE IS 415 V HOW I CAN CALCULTE

2 Answers  

---

errection check list for transformer maintenance

0 Answers   RRB,

---

I have a current transformer with 1 main reading meter with transformer outside the building and a control panel having 5 CT reading meters with black round coils inside the building. I want to know, A) when current pass through the Transformers, will the current be reduced or be the same and after that B) when current pass through the CT meters with black round coils, will the current be reduced or be the same. C) in the above process will the reading of the main meter be same or different, from the total reading of all the 5 CT meters.

0 Answers  

---

What do you mean by an instrument transformer?

0 Answers  

---