Answer / alok

In India according to indian standard we use + or - 30 degree phase shift between LV and HV side.
so we can use Dyn11(for star LV is leading delta HV with 30°) or Dyn01(for delta HV is leading star LV with 30°)

It depend on 12 hour clock like 1=30°,2=60°......11=330°or(-30°),12=0°

Is an SCR semi controlled device?

4 Answers   IOCL,

---

sometimes, eventhough the HV side of the transformer is opened there is a voltage in LV side .How is it possible?

4 Answers  

---

what is the pre charge circuit,what will be work which function it will be use plz tell me

0 Answers  

---

can anyone tel me what is competency of electrical supervisor??

2 Answers   ONGC,

---

What is protection for single phasing ?

6 Answers   SISL,

---

State magnitude criterion.

0 Answers  

---

where solid grounding and where grounding through ngr done and why?

0 Answers   NTPC,

---

what are different type of triping equipmen like MCB,MCCB and their differences

3 Answers   ABB, Schneider, UPPCL,

---

what is AB switch???

6 Answers   NTPC, Simplex,

---

ALL HT /LT PANEL TEST? DISCRIPTION.

0 Answers   Essar,

---

why power factor laggs and leads in case of inductance and capacitance??

1 Answers  

---

pls tell about gas insulated substation?which gas is used for that substation?above which rating we are used this substation?how we take maintenance in that substation?it means substation fully shutdown or live condition?if live condition means how?pls clear this things

1 Answers   Essar,

---