why dc series motors never start without some load, and what will happen if starting with out load..

1 Answers  

---

What is working principle of ACB and VCB?

9 Answers   Greenko, HCC,

---

what are RCBO ?

4 Answers   GE,

---

A double circuit with dog conductor 66KV Transmission line from wind farm evacuation to feeding substation having capacity of 25MW for transmission. Can same transmission network be considered for further expansion of Power & how much in MW. If we need to expand next 10-15 MW more will there any augmentation is required in transmission network? Kindly reply asap.

0 Answers  

---

To test Transformer we give HT side 440V to see wheather that it is producing 17.6V on LT to verify Voltage ratio is correct or not but when we give the 440V voltage to LT side then what will happen to HT voltage ?

3 Answers   Aditya Birla,

---

Please explain how to do 'tan-delta test' on AC generator? and where i get clear and brief detail, give any web page address.

1 Answers  

---

How to increase the kvah ?

1 Answers   IGP,

---

A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is onbserved the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?

1 Answers  

---

how dia of wire and angles are calculated for overhead shielding wire to protect substation equipment from lightening strokes???

0 Answers  

---

What is neutral earth voltage of transformer and what should be the value

3 Answers  

---

Why does increasing the magnetic flux in the main field of a d.c motor cause the armature current to reduce??

0 Answers  

---

What is the vector group of a transformer,how can it be found out?

0 Answers   Jindal,

---