# motor

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• #10434
nigel
Participant

can someone calculate the amps for these motor

1 5hp/3ph/ac drive motor 415volts/50Hz

2 2hp/3ph/ac conveyer drive motor 415v/50Hz

3 3hp/3ph/ac pump motor 415v/50Hz

4 5hp/3ph/ac pump motor 415v/50Hz

5 10hp/3ph/acdrive motor 415v/50Hz

6 2hp/3ph/ac pump motor 415v/50Hz

7 4kw/200v/dc conveyer feed motor

8 5kva/3ph/ac 415v/50Hz

9  .5hp/1ph/ac fuelpump motor

10 1hp/1ph/ac water feed motor

11 2hp/3ph/ac conveyor drive motor

12 10 hp/3ph/ac cold roomcompressor motor

#11930
Keymaster

dear,

what is conditions for calculations? like power factor etc

#11943
shahoreare
Participant

if any considaration like as pf or other……………..

#12149
Spir Georges GHALI
Participant

nigel said:

can someone calculate the amps for these motor

1 5hp/3ph/ac drive motor 415volts/50Hz

2 2hp/3ph/ac conveyer drive motor 415v/50Hz

3 3hp/3ph/ac pump motor 415v/50Hz

4 5hp/3ph/ac pump motor 415v/50Hz

5 10hp/3ph/acdrive motor 415v/50Hz

6 2hp/3ph/ac pump motor 415v/50Hz

7 4kw/200v/dc conveyer feed motor

8 5kva/3ph/ac 415v/50Hz

9  .5hp/1ph/ac fuelpump motor

10 1hp/1ph/ac water feed motor

11 2hp/3ph/ac conveyor drive motor

12 10 hp/3ph/ac cold roomcompressor motor

Dear ;

To be able to calculate the nominal current for a motor, you should know also the Power Fcator ” Cos φ ” for this motor, and if it's Single Phase  or  3Phases motor, then we can apply the formula :

– For Single pahse : I = P / V x Cos φ

– For 3 phases : I = P / 1.73 x U x Cos φ

where :

– P : Motor's Power in ” kW “, but if we have it in ” HP ” we can take each HP = 0.742 kW

– V : Voltage between phase & neutral

– U : Voltage between 2 phases

But we should also take into consideration another factor that's ” The Efficiency ” of the motor, So the final value of the motor's current is :

In = I / Efficiency

Regards.

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