Answer / bikkina

because of multiply with form factor 1.11

Answer / pradeep kumar gupta

most of the alternators in india are design by BHEL which is
pre design at 11kv because this voltage required by plant
auxiliary machine and instrument. and transmission line
but if we want to alternator of 15 or 16kv we can but we
have to give spacial order to manufacturing company which
will be very costly due to individual peace.

Answer / somesh upadhyay

the insulater is design for 11kv in xn line so the xn line
vtg are of the multiple of 11.for example 11kv*n=xn line vtg .
if there is a 12 insulater in one string then the xn vtg
will be 11kv*12=132kv.

Answer / naveenreddy

cause in power system we are using sinusoidal wave forms,so
the form factor of the sin wave form is 1.11,that is why we
are using multiples of 11...............


if we go beyond 15 or 16 we have to face so
many problums like insulation damages,in sufficient cooling
e.t.c

while conducting an experiment why we connect the armature rheostat in maximum position and field rheostat in minimum position

1 Answers  

---

We have .ht motor which is 60Hz.we run on 50Hz.so that it's speed reduce but we had one prob.that motor winding temp increase up to 135 deg.we want reduce this temp.what to do?we arrange ext.cooling fan but not much effect.we want reduce this temp. Inhouse without affecting much.cost. also don't want reWINDING OF MOTOR?

3 Answers  

---

how we select fuse rating for motor?

6 Answers  

---

what is softstarter? explain briefly where it is used?

2 Answers   Essar,

---

why fuse amperes rating are specified ratings like 32amp & 64 amps?

2 Answers  

---

what does a string of resistors in a series will do?

0 Answers  

---

IF THE OUTPUT OF A 100KVA, 415V GENERATOR IS STEPPED UP TO 11KV WITH A 500KVA TRANSFORMER,CAN THE TRANSFORMER BE LOADED ABOVE THE SOURCE GENERATOR RATING?

4 Answers  

---

wich type of cable is selected for wiring of 20hp motor?

5 Answers   Alchemist,

---

how would you determin the horsepower of a motor without a nameplate

3 Answers  

---

hello! can anyone explain to me how a 3 speeds table fan work? what are the factors that are controlling the speed of a normal table fan? Is it by varying the voltage or changing the magnetic field? would appreciate your reply :) thx in advance.

2 Answers  

---

how the ac voltage are selected like 220v,415v,750v,1000v& 1.KV,6.6KV,11KV,33KV,66KV,132KV,220KV & why these are selected like these orders

2 Answers   Jindal, JSW,

---

which pole motor is best ?4 pole motor or 6 pole motor,why?

2 Answers  

---