[labren sondhi]

Sorry, the drop is not I x Z as indicated, but should be 

I²xZ

[labren sondhi]

Calculate your current from

kW=√3VIcosф

Work out your impedance Z from point A to B where A is at the sending end and B is 35 m away. Your voltage drop will be approximately I x Z. Your  voltage will drop by this amount.

[labren sondhi]

Ahamed,

To complete the equation for pump power calculation: the pump power (kW)  will be equal to flow rate in cubic metres per second x density of fluid in kg/cubic meter x acceleration due to gravitational force, 9.81 m/second squared, x head in metres. The shaft power (kW) will then be this pump power/pump efficiency.

 

[labren sondhi]

AHAMED said:

Dear Engineers,

 

I need some details about to  how to calculate the pump power from the general mechanical details.

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The pump will be required to pump Qn cubic metres of water per second to a head of H metres at n efficiency. Work out the pump power from these parameters considering that water density is unity. Is this information usefull? Check the units on both sides of the equation. 

Labren

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