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.