Why does the rotor rotate?

0 Answers   Elin, OPTCL,

---

i have ht transformer of 142 kva with air cooled facility,having secondary voltage 7850volt, and secondary connected full way bridge rectifier .i faced the problem repeatedly that transformer one coil and rectifier diode of two phase was burnt two times. i checked all the secondary ckt. no any short ckt found,then what will be the cause side

2 Answers   Modern Terry Towels,

---

In all analog voltmeters or ammeter showing some small size symbols. as well as a star and in star 2no. digit, resister symbol,and other. what is that's meaning ?

1 Answers  

---

why dc supply is given for excitation of ac alternator?how dc can produce flux?

5 Answers  

---

How voltage step down is done?

3 Answers   IOCL,

---

What do you mean by deregulated power system structure? Which structure (regulated/deregulated) is used by modern power system?

1 Answers  

---

what will happened to give the dc supply to ac transformer?

3 Answers   Sail,

---

WHY SEPARATELY EXCITED MACHINE NEEDS EXCITATION BY DC SUPPLY WHY NOT BY AC

0 Answers  

---

In power transmission using open belts or horizontal shafts it is preferable to have the slack side of the belt on the top because

0 Answers   Caterpillar,

---

When a single pase capacitor run motor- run on 230vac and Case(1)run with 8 Mfd 250 vac.capacitor , Case( 2) run with 8 Mfd 400vac capacitor. What is difference between both case regarding power ,efficiency etc?

0 Answers  

---

what is meant by fuzzy logic? what is fuzzification and defuzzification?

5 Answers   MEIL, Power Grid,

---

why is the vector group analysis done in transformer tests

28 Answers   K K Rao, Lloyds, Nicco Engineering Services Limited, Qatar Petroleums,

---