Answer / hari krishna maganti

we r not useing always 2 or 3 phase suply..
for singie phase suply neutral is must.....

Answer / mintuk1@gmail.com

For transmitting the power generating substation transformer should connect delta star for step up at high voltage also getting ground wire for reducing third harmonic current in transmission line.

Answer / bhramit agarwal

bcoz ie is in star per phase voltage is 1/3^1/2 times the line voltage.so overall voltage decreases.and loss in a line is decreased.

Answer / suresh apgenco

to provide path for third harmonic currents and as line
voltage is equal to phase voltage, size of the conductor
will reduce.

Answer / prateek negi

BCOZ STAR POINT GENERATES NEUTRAL AND ELECTRICITY IS
DIDTRIBUTED IN THAT FORM WITH 3 PHASE AND ONE NEUTRAL

What should be value of Circuit breaker operating time and tripping time?

3 Answers  

what is the RMU and RMU system in sub-station(11kv,66kv.....)

2 Answers   Alstom, Torrent Power,

In DC current-excitation to transformer, why it sucks more current? Eventhough there is no power transfer between primary and secondary? R is very low so it should suck less current only na thn y its current increases?

2 Answers   Cairn,

why rotor resistance starter is not suitable for squrielcage induction motor?why it is suitable for slipring induction motor?

5 Answers  

If a transformer primary winding operates at 240v, the secondary at 120v and the load is 1500w & the transformer is rated at 92% efficient, what's the current flowing through the primary winding of the transformer? What is the formula for finding this?

0 Answers  

how can calculate 1kva generator running time in 1 liter keroscene

0 Answers   Kirloskar,

What is the difference between ARC & SPARK?

4 Answers   OPTCL,

what is the differance between ac induction motor and ac synchronous motor?

5 Answers  

What is a pulse transformer?? Can it be called as a dc transformer??

1 Answers  

can i use 10 mfd + 6 mfd instead of 15 mfd capacitor in single phase motor as running capacitor

3 Answers  

what is the Knee point Voltage?

3 Answers   AAPT,

what is there inside an inverter and how it works?

0 Answers