Voltage Configuration Question

[andykee]

Looking to understand what the implications are if you supply power of single phase 240v line to line to a motor/controller that is rated for up to 240v but is labelled as L-N? (The motor controller is european/spanish)

 

[petersonra]

is this motor controller UL listed?

 

[Besoeker3]

Looking to understand what the implications are if you supply power of single phase 240v line to line to a motor/controller that is rated for up to 240v but is labelled as L-N? (The motor controller is european/spanish)

I think that would be fine. What you might have to consider is the voltage. European would be 50Hz. For USA it would be 60Hz.

 

[andykee]

is this motor controller UL listed?

I'm assuming yes.

 

[petersonra]

most of the time if it is UL listed, the terminals will be labeled L1 and L2/N, or something similar. or there will be a similar notation in the instruction manual.

 

[andykee]

I'm assuming yes.

I think that would be fine. What you might have to consider is the voltage. European would be 50Hz. For USA it would be 60Hz.

I think that would be fine. What you might have to consider is the voltage. European would be 50Hz. For USA it would be 60Hz.

I think that would be fine. What you might have to consider is the voltage. European would be 50Hz. For USA it would be 60Hz.

 

[andykee]

The manual just has a voltage range and doesn't mention configuration. It was only when I saw the attached.

 

[petersonra]

the picture is of a surge protector not a motor controller

 

[andykee]

Correct, that is in the controller.

 

[Hv&Lv]

Looking to understand what the implications are if you supply power of single phase 240v line to line to a motor/controller that is rated for up to 240v but is labelled as L-N? (The motor controller is european/spanish)

I would check to make sure the case or other components don’t “ring out” before you do that.
You may be energizing the frame.

 

[Besoeker3]

the picture is of a surge protector not a motor controller

Is your motor 60Hz or 50Hz?

 

[LarryFine]

I would check to make sure the case or other components don’t “ring out” before you do that.
You may be energizing the frame.

Agreed.

Make sure the N terminal is floating relative to the EGC, and the device doesn't depend on N being grounded.

 

[Carultch]

I think that would be fine. What you might have to consider is the voltage. European would be 50Hz. For USA it would be 60Hz.

Good point. It is common for motors to be cross-compatible with both the three phase grids of the USA and Europe, due to the coincidence that 400V / 50Hz is the same as 480V / 60 Hz. The motor has working principles that depend on the same "Volts per Hertz" ratio, and a rotation speed that is proportional to the frequency in Hertz. Such as 1800 RPM for 60 Hz, and 1500 RPM for 50 Hz.

The same can not necessarily be said for 240V motors, that likely are built for a 50 Hz frequency. The controller may have a DC power supply, which are commonly built to be cross-compatible for both frequencies. But I wouldn't expect the same for the motor.