Required Transformer Capacity???

mkomaravelly said:

Dear All,

I have a requirement for Transformer..

7.5hp Motor with 3 Phase, 415Volts, For this requirement I need a Transformer.

Can any body suggest me required 3 Phase Transformer Capacity for the above said requirement.

 

Thank you.

Dear ;

Fisrt, this motor is a small & standard motor, and you can run it by using any ” 3 Phases + Neutral / 415/239V “, so, why you need a transformer ?

Please, explain more about the kind of supply that you have.

mkomaravelly said:

Dear,

We have got a requirement from customer side, more over its in Agricultural Area. Customer is preferring 3 Phase 10kVA Rating Transformer for the above mentioned hp.

Instead of 10kVA, we wanted to supply him 16kVA for other issues.

 

So,please reply me.

Thank You.

Dear ;

Refer to your answer, please note that the procedure to define the Power of transformer is as follow :

– The motor's power in ” kW ” is : 7.5 ( HP ) x 0742 = 5.5 kW

– The needed power assuming that ” Cos φ = 0.85 ” = 5.5 / 0.85 ≈ 6.5 kVA ( if the Cos φ is different, please re-do the calculation )

So, 10 kVA if suitable with around 50% plus than the needed power, but certainly with the standard percentages of ” Drop Voltage “.

Regards.