I just purchased a 1200 watt inverter.It's suppose to handle up to a 3000 watt surge.I plugged a 10 amp circular saw into it.It started up but my voltage dropped down to 30 some volts and took approx.7 seconds for the saw to reach full speed.Why does it take so long?Does the saw drawl more than...
rhatcher,
I do know that these pump sizes were used in other customers plants with no problems. I realize that the motor voltage needs to be used to determine power but our customer will not open or pig tail the enclosure to find out the true volts. The equation I used to calculate motor power...
For power I used the following formula:
P = (1.73 x Amps x Volts x P.F. x Eff.)/746
P.F. being the motor Power Factor
Eff. being the motor Efficiency
Amps being the single leg current
and Volts being the motor voltage of 2300
Stan K.
I have two different size pumps using the same 900 HP, 2300VAC, 3PH, 60HZ motors. The pump efficiencies were determined using amp readings on the motors, with negligible losses between the motor and pump. Both pumps are determined to be 20% less effiecient than our curves show. We have these...
I have two different size pumps using the same 900 HP motors. The pump efficiency is being determined from the amp readings on the motors. Assuming very small losses in the gear box and Mech. seal I have 2 different size pumps that are both 20% less effiecient than our curves show. We also...
