Answer / faizan

For cable selection we need supply voltage,load current and distence between source to load end ,then we can choose the size of cable and also it depends on meterial of cable,( cu/alu )..

Answer / pratap

70 ton=245280watt
I=245280/1.73x440x.8
 
  =402 Amp
cable size 400sq.mm(3 phase +neutral)

conditions for parallel operation of dc generators

4 Answers  

---

what will be the effect on the voltage .if power frequency is increasing or decreasing.

2 Answers  

---

I am abt to give IOCL intrv.Plz sir guide me for IOCL intrvw (Electrical).Which subject to be consider. questions are generally asked from which subject.Plz help me out.

0 Answers   IOCL,

---

what you mean by transformer neutral earthig

1 Answers   IOCL,

---

as we know that N=120f/P speed of an im can be controled only through changing no if poles, can we control by changing the frequncy????

7 Answers   JSW,

---

How to decide and select the different earthing wire size for the different types of earthing

0 Answers   Suzlon,

---

What is the Working principle of ELCB and RCCB?

1 Answers   Geo Miler, L&T,

---

What is difference between isolator and circuit breaker?

0 Answers  

---

Is there a chance for a motor speed to become negative..?? What is the reason for such a phenomenon.? In that case does the motor works as a generator..???

1 Answers  

---

how to identify conection leads of an unknown electric motor

0 Answers  

---

where connected OLTC for transformers?

3 Answers   Apollo, CBRE,

---

I have a 25 KVar capacitor bank at my facility.How to check the capacitor bank ??

2 Answers  

---