Answer / bishnu das

first function of the bushing is to connect the winding to
the line with an insulation sorrounding the transformer.and
one lightening arrester also present in the bushing to
protect the tranformer winding.

Answer / satheesh

bushing is to separate the winding( line ) form the earth (transformer ground) hence to avoid the short circuit.according to the field analysis the bushing are made otherwise it leads to breakdown due to electrical stress applied

Why all transmission lines are AC, not DC line?

4 Answers  

---

It is a three inch fan and i want it to rotate to other direction .I've tried cutting the wire and reconnecting them inverse like black to white and white to black ,but it won't start rotating when i plug it in that way.And then it works again when i rejoin the wire to the way it is. I don't know what causing the problem.Is there anyone familiar with these small mortor?Any suggestion would be appreciated.Thanks!! http://i296.photobucket.com/albums/mm163/sasukebloodwheel/110527-105859.jpg

2 Answers  

---

Is there any difference between circuit breakers and isolators

7 Answers  

---

What do you meant by slip power recovery?

1 Answers   PSEB,

---

is dc shunt moter oprate on ac? if no why? if yes how?

8 Answers   IOCL, JJJ, Power Grid,

---

choose the non-switch device (A) transformer (B) diode (C) transistor (D) IC

3 Answers  

---

what is megar healthy value for ht &lt cables

2 Answers  

---

Why we use neutral cable just half from phase cable.Tell me briefly,please.

4 Answers  

---

To prevent the mal operation of a differentially connected relay while energizing a transformer, the relay restraining coil is baised with (a)second harmonic current (b)fifth harmonic current (c)third harmonic current (d)seventh harmonic current

2 Answers  

---

what is the Maximum voltage range for single phase

4 Answers  

---

While connecting the flood light plug on to the 415 V distribution panel,there was spark and the cable got burnt. Three ignitors of the flood light also burnt of. The lamps are of 400 W (total 6 lamps) connected through 1.5 mm2 cable. The plug was immediately removed from the circuit. There was a 30 mA RCD connected and a 250 A MCCB; however both did not trip. What could be the possible reasons for the circuit devices not to trip?Can someone assist please. Additional info if needed can be provided.

2 Answers  

---

What is dynamo?How it works and what is the function of dynamo in a DG.

3 Answers   Amrapali,

---