# What are load calculations for a transformer?

1. Jul 27, 2009

### shaibaaz3

what are load calculations for a transformer???

A 44kv line is distributed into the industry using around 8 transformers 3750kva, 2500kva and 1500kva. What does this mean and what are the load calculations for this???? Also how is it distributed???

2. Jul 27, 2009

### negitron

Re: what are load calculations for a transformer???

KVA is simply volts times amps. And, it's usually three-phase, so you divide the line-to-line voltage by the square root of 3 to find the line-neutral voltage. So, for example, if you have 44 kV into a 3750 kVA transformer, the maximum current will be 3750 / (44 / SQRT (3)) / 3 = 49.2 amps per phase primary current.

3. Jul 27, 2009

### shaibaaz3

Re: what are load calculations for a transformer???

thank u.....

4. Jul 30, 2009

### m.s.j

Re: what are load calculations for a transformer???

Distribution of load on individual transformers is related to their rated power and impedance voltage. For detail calculation you can refer to Transformer Riddle No. 27 from http://electrical-riddles.com

Last edited: Jul 30, 2009