Answer / 7anoter4

Magnetic energy is W=B*H =miuo*H^2=K*i^2
Wmax=K*Imax^2 ¼*Wmax=K*Imax^2/4 i=Imax/2
The current equation it is: i=Imax*[1-e^(-t*L/R)] . If
i=1/2*Imax then : e^(-t*L/R)=1/2 and t=-LN(1/2)*R/L R=10
ohm L=0.250 H t=27.73 sec.

how to claculate earth strip size for 1500kVA transformer for neutral and body

4 Answers  

---

I WANT HOW CALCULATE TO CABLE FOR WELDING PLANT ?

0 Answers  

---

how induction generator generated the power without excition like syncronous generator.

3 Answers  

---

bsnl tta exam question

0 Answers  

---

What are the types of instrument transformer?

0 Answers  

---

why does make gain margin and phase margin on same plot.?

0 Answers  

---

what is resonance in electrical circuit and its effect? where we get high resonance and low resonance?

1 Answers  

---

Practical condition in 400KV Sub station:- Breaker(open) , isolator(open), Earthing (close) at both end e.g A & B. Now Open A Stn Earthing than Open B stn Earthing (Which have a 50MVA reactor) , AND suddenly show R,Y,B phase 704KV,573KV,118KV respectively. Que is without closing of breaker how it is possible.???? My Whats app No:07621840498 for Further Discussion. Pls experts suggest.

0 Answers  

---

What is the exact minimum vale of voltage between an earth and netural which can damage or can do malfunction of the electronic equipments ? If this is mentioned in any book, pl.give reference.

0 Answers   Bhushan Power Steel,

---

how to give earthing in ships?

1 Answers  

---

What are IP protections used for electrical panels, JB, equipments installed in explosive zones like Petrochemicals, Oil & gas

1 Answers  

---

What is control system?

0 Answers  

---