Interested to Buy Any Domain ? << Click Here >> for more details...
3phase 4 wire system is more reliable or 3 phase 3 wire systems?
- 4 Answers
- 6312 Views
- I also Faced
- E-Mail Answers
Answer Posted / suraj chawardol
We should have clear concept regarding where 3 phase 3 wire system used and where 3 phase 4
Wire system used
1.3 phase 3 wire system= In India electrisity is generat at 11 or 33 kv.then it is step up with the help of tranformer. To transfer it from generation station to substation 3 phase 3 wire system is used. Then it is step down at substation or directly feed to application having such rating. Genarally 11 kv feeder are brought near to distrubution transformer near to load ( near to home genarally called DP). The input to distribition transformer is 11 kv feeder and output of transformer is 440 v , 3 ,phase 4 wire system. ie 3 phase R,Y,B and one neutral.
2. 3phase 4 wire system = the secondary side of transformer is star connected so line voltage become 1/sq root 3, ie near 240 v . Our home appliances are design to work at Approximataly 230 v ,50 hz so we need any one phase and neutal for single phase load .
3. Also for high power application we need 3 phase 3 wire system such as Induction motor.
4. Both the system have its own importance depending on applications.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,
-What shall be short circuit current of LV switchgear for a 1000 kva, 11.415kv, 3 phase tranformer with 5% reactance.
What does the kvar means?
is the value of inductance depends upon the value of thitha in doubly excited machine??
what material is used in capaciter
Application Comparison between 22KV (UE)and 33KV (E) system. Are we allowed to use 33KV (E) cable in lieu of 22KV (UE) cable. What are the technical disadvantages.
we specify current in case of feeder but in case of distributor voltage, why?
What is the difference between security constraint unit commitment and security constraint optimal power flow?
what is the function of impulse relay
There is any especial requirement for motor to drive through with VFD?
If we have use two power cable for incomer, that time how many use cbct for earth leakage protection? 1 or 2 if 1 way? If 2 way?
The D.C. spark test is applicable to single conductor cable & assemblies of insulated single conductor cables without insulation shield,metallic sheath or metalic armor?
how to failure indution motor insulation & how to improve heat in motor insulation
How to select the gauge of wire for winding of motors? How to select number of turns for winding of three phase induction motor?
what are factors comes under relay setting (distance relay 7sa52) under OPEN DELTA VTs connection??
