Answer / s.ravikumar

NORMALLY THE GENERATING VOLTAGE AT ANY POWER STATION IS 11KV.
THEN THE VOLTAGE(11 KV) HAS BEEN STEPPED UP TO 33KV,110KV,230KV OR 400KV.
THE REASON FOR STEP UP IS TO AVOID THE LINE LOSSES DURING TRANSMISSION AND DISTRIBUTION FROM GENERATING STATION TO THE SUPPLIER END(GENERALLY LONG DISTANCE).
ACCORDING TO THE LOAD AT SUPPLIER END THE RANGE OF VOLTAGE VARIES.
EXAMPLE:
SOME OF THE HOUSE HOLD ITEMS ARE 230V(SINGLE PHASE) RANGE:
1.TV
2.IRON BOX
3.FAN,ETC.
AND SOME OF THE HOUSE HOLD ITEMS ARE 430V(3 PHASE) RANGE:
1.3 PHASE MOTORS
SO IT IS CLEAR THAT EACH ITEM HAS SEPERATE VOLTAGE CLASS.SO WE CANNOT GIVE 230KV TO A 230V ITEM(IT DAMAGES THE INSULATION OF EQUIPMENT AND IF NO INSULATION THEN THE USER WILL SURELY GET DEATH).
,HENCE THE GENERATED 11KV IS STEP UP TO ANY OF VOLTAGE RANGES 33KV,110KV,230KV OR 400KV AND IF REQUIRED THE THAT SAME CAN BE STEP DOWN BY TRANSFORMERS LIKE:
1.400KV/11KV
2.230KV/11KV
3.110KV/11KV
AND 11KV/440V

NOTE:IF THE VOLTAGE LEVEL IS HIGH,THEN THAT MUCH OF INSULATION,GROUND CLEACRENCE HAS TO BE MAINTAINED.

Answer / a.p.nanjappa

high voltages are safe method to trasfer power generations
bulk power .
High vloltahe are directly used in iron steel factory arc
furnaces -400kv,230kv to 60,30kv arc furnaces, where
generation source very near or long distace net work.

industries adopt bulk supply.
domestic, medium comsummers are 400v,4W,and 230v -mobile
charger ,tv,washing machines, frinders, .....

when we increase load , current drawn from source also increases why ?

5 Answers  

---

How many gap between finger contact in a.c.b. and v.cb.?

0 Answers  

---

What is the actual meaning of thermal power efficiency ?

0 Answers  

---

why circuit breaker closing time is always higher then tripping / opening time.

13 Answers   United Phosphorus,

---

what is neutral ground resistance relay? how it is helpful in protecting system?

5 Answers  

---

battery spicgravity mesuserd?

1 Answers  

---

How to decrease or increase the range of voltmeter? can an ammeter be used to measure voltage? can a wattmeter used as voltmeter and ammeter?

3 Answers  

---

how "rabbit ACSR" conductors are more efficient than "weasel ACSR" conductors

1 Answers   AITM,

---

what is the differnce between vector and phasor? are both same or there is difference between two term.?

6 Answers  

---

which types of tests are required after commissioning of 6.6 kva tranformer?

3 Answers   Reliance,

---

What is auto transformer?

7 Answers   L&T,

---

is it possible to start a motor in felid connected to a remote mcc

0 Answers   BIET,

---