Can u tell me design of switch yard

0 Answers   NTPC,

---

Where is 2 phase supply used commercially?

3 Answers   NTPC,

---

when a hand crancked meggar is used to check most three phase induction motors, how many tests r rquired? Why?

1 Answers  

---

how much amp MCB is required for 1/2 kva power back up?

2 Answers   Havells,

---

what is bjt & mosfet? what is rectifier & diode?

1 Answers  

---

by what factor the starting current is used when comparing star and delta connection for motor starting?

0 Answers  

---

During the main stator winding insulation testing (phase to ground)of 11kv alternator (Lerysomer) i found 0 and resistance with multimeter and found 20 killo ohm while the power cables are connected both end (Generator & VCB). In VCB PT (Potential transformer) are connected. Please any body explain that method of insulation is correct or not? also describe of PT connections

1 Answers   Private,

---

What will be the direction of rotation of a Alternator in case it goes in motoring action when connected with grid ?

6 Answers   DVC, NTPC,

---

If we want to change a contactor of faulty one what are the conditions want to fullfil

0 Answers   Qatar Shell,

---

how to measure the current by compact digital equipment with dislay which fit inside any equipment

0 Answers  

---

how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc

2 Answers  

---

draw 3 phase rectifier diagram

0 Answers   Equate,

---