Answer / vishal

It is not ri8 ..generating station may generate voltage at nnormally
15 kV......

v=I*R, i.e V is directly proportional to I. now P=V*I. so V=P/I. thus v is inversely proportional to I. so what is the correct one? If both are correct than for which kind of condition this 2 differ

3 Answers  

---

what is the max working temperature of an oil filled transformer say of about 1500kva.

3 Answers  

---

What is servo motor? what is its purpose?

0 Answers  

---

What is Procedure the procedure to select CT's & PT's in 66kV and above substation

1 Answers  

---

7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?

0 Answers  

---

---

For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

0 Answers   Hormozgan Steel,

---

What happened when the field winding of dc series motor is open?

2 Answers   Bhel,

---

what is pmg and its use

2 Answers  

---

What is 2P*0.5 sqmm screened copper cable and what is the use of it..?

1 Answers  

---

I have 480V Single phase and I am trying to figure how big of a transformer (KVA's) and Primary breaker size I need to provide 200 Amps at 240V for a building.

1 Answers   Wipro,

---

why the generating / transmitting voltage is in the order of multiples of 11(ie 11kv,22kv,33kv......)

1 Answers  

---

What are the steps for Testing of 6.6KV HT Panels?

5 Answers   BSL,

---