Ambient44
Member
- Location
- Oak Lawn, IL
I have 200Hp motor installation on a pump that will be 600' from the MCC the FLA is 230A @ 460V /EFF= 95%/ PF = 0.86 / No load current 60A/ in rush current X 6.3. with the voltage calculations for a 3-phase 3-wire motor load voltage drop I come up with the following; 0.158 (2 x res. of conductor) x 600(one way length of conductor) x 230 (current in conductor) x 0.866 divided by 179.4 (Cir. mills for 4/0 copper conductor) = 75 amps.
1. is this the correct calculation for a 3-phase/3-wire motor?
2. if this is correct what cir. mills should I use for the calculations, the normal conductor for the current ie 3/0?
3. If this is correct do I add the 75 to the FLA and size my conductors accordingly?
Additional information:
Locked rotor torque 230% / break down torque 240%/ Conductors are to be installed in GRC outdoors on a rack.
Thanks for your input.
1. is this the correct calculation for a 3-phase/3-wire motor?
2. if this is correct what cir. mills should I use for the calculations, the normal conductor for the current ie 3/0?
3. If this is correct do I add the 75 to the FLA and size my conductors accordingly?
Additional information:
Locked rotor torque 230% / break down torque 240%/ Conductors are to be installed in GRC outdoors on a rack.
Thanks for your input.