Answer / me

Greetings all,

iam working in an out door lighting design for our plant
and i calculated the total watt needed (sum of all lights)
= 53 kw, 220 volt

our power supply is 480V

so, I chosed a 75 KVA transformer dry type 480/220-127 V 3
phase 60 Hz

cable size from feeder to transformer primary = 50 mm2 (1/0
AWG)

cable size from transformer secondary to distribution panel
board = 125 mm2 (250 MCM)

distribution panel board main breacker = 250 A

So, are my calculations ok ? any changes or suggestions ?

thanks in advance

what is a circuit breaker. Weite the types of circuit breaker.

4 Answers  

---

what is the problem with single phase AC motors and how is it overcome?

2 Answers  

---

WHY FEEDERS TRIP IN COLD AND FOGY WEATHER?

2 Answers  

---

How to calculate impedance volt in Transformer?

0 Answers  

---

exolain the star delta connection

0 Answers   Toyota,

---

---

How to put breaker in service / test position.

1 Answers   KSEB, L&T, Siemens,

---

Why we did not feel electric shock in electric train?

1 Answers   NTPC,

---

Should the neutral earthing of 33/11KV D-S transformer, be connected to the earth grid?(Yes/ NO) why?

1 Answers   HAL, Vijai Electricals,

---

what purpose to use excaiter in DG.?

0 Answers   TATA,

---

Testing procedure of DG alternator stability test

0 Answers   Amprotec,

---

in which direction real power and reactive power flow and why???????

3 Answers  

---

please give some hindalco placement papers for written exam

0 Answers   Hindalco,

---