Answer / abdul rahman

Each unit as in each flat 5kw ?? That would be 250kw for 50 flats.
250kw into 1.8 would be total current = 450amps
Cable sizing Acc to Dubai STDs for 450amps would be 
2runs x 4C 150sq.mm Cu + 1C 150sq.mm ECC 

Transformer sizing u need to take into account 20-25% future use efficiency of t/f and diversity factor

So for 250kw it would be 250x1.2x.8/.9 nearly 300kva transformer.

If not into production, how far did you follow the design and why did not you see it into production?

0 Answers   Bharti, Havells, Intel,

---

our factory is going under construction mean time transformer 1000 kva 2 nos &load break swithch 12 kv & 4 nos 750 kva 2 nos & 380 kva 2 nos generator to be errcted.how to arrange earth pits &how to earth connect & neutral pit how to calculate in earth bit size.

0 Answers  

---

In 11kv transmission line whats the maximum power can be drawn?

1 Answers   Concast, Prestige,

---

I have 90KW Motor 60 Hz,380V Pf 0,88. after testing the Motor without Load is the no load Current 36 A,but wenn i put load after 2 hours the current increase more than 156 A. Can anybode tell me waht is the Problem?

4 Answers   ABB,

---

my UPS suddenly goes off and all panel light also blow off.This happens even main electric supply is not interrupted.After some time it automatically starts functioning normally.Batteries are new.

0 Answers  

---

what deffrence between KW $ KVA ?

7 Answers  

---

How to determine the Power factor is Leading,Lagging & Unity ?.I don'thave any Meters.

3 Answers  

---

I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. Between alternator & breaker one stepup transformer used. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

0 Answers   Jindal,

---

WHAT ARE THE EFFECTS OF SERIES RESONANCE AND PARALLEL RESONANCE ON THE CIRCUITS PARAMETERS?

0 Answers  

---

How to select the different contactors ( starter combination) for different AC motors? what about fuse cappacity 4 different motors too?

2 Answers   Equate,

---

where we take earth in hill station

1 Answers  

---

two 100W/230V bulb are connected in series. what would be the voltage drop across 1 bulb

6 Answers  

---