3~motor rated for 500V/50Hz/0,75kW and 575V/60Hz/0,86kW

[andstef]

What will be the difference in current flow, speed and power if I connect 3~motor to mains 400V/50V or to mains 480V/60Hz. In which case will be the current and power bigger? Will be the speed different?

3~Motor data are as follows:
50Hz/ 500V/ 0,75kW/ 1,92A/ 2855/min
60Hz/ 575V/ 0,86kW/ 1,96A/ 3455/min

 

[jwerthman]

I'm not sure what your question is. You seem to have all of the data for each motor already. From the data you provided, the 500 V motor is slightly lower power input (.75 kW) and current (1.92 A) and lower speed (2855 rpm). Your choice of motor is really going to depend on what your power system voltage and frequency are. You don't want to buy the 575V/60Hz motor if your system is 500V/50Hz, and vice versa.

If I'm not understanding your question, please clarify and I'll try again.