Answer Posted / srikanth.kondru

very simple

we need to know the Load of the sub station ..
for example it is 1000 H.P
as we know that 1 H.P =1.5 amps
voltage is 220 KV
power ,p = 746KW = 1.732*0.8*220KV*I
I = 746 KW/1.732*0.8*220KV
= 2.4 amps
S=220*2.4*10^6 =532 MVA

How to choose size of the cable w.r.to current carrying capacity ...

2248

---

The knee point of a current transformer is normally unique and known.So why in the nameplate of a CT they put the minimum value like this Vk> 400v.

1431

---

What is stepper motor. What is its uses?

1334

---

how could we calculate the no of outgoings from a 800 watt distribution board

1861

---

if a number of plc s are there then how many modbus to be used

2002

---

Differentiate between Zero and Negative sequence current

1953

---

regarding safety what would u consider the most important rules to observe when inspecting electrical equipment?

2096

---

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1854

---

how can we find thae value of capacitor for single phase motor. what is difference between starting capacitor and running capacitor.

2433

---

Explain the process of commutation in a dc machine.

1098

---

Where can I get CPWD electrical specifications & Shedule of rates? Please help me

2299

---

Can anybody inform me about the pattern of ECIL GET( Graduate Engineers Trainee) interview for Electrical students? Will there be HR round as well? I thought of preparing for 2 to 3 subjects thoroughly. Will it be sufficient? Please share your thoughts.

2198

---

What is transister define the transister ammiter ,base, colector.

2275

---

What is the unit of magnetic flux density?

1234

---

Starting times for soft starter & power factor is thier any standard or datas available in manufactures list. Kindly suggest.

1971

---