Which voltage option for single phase supply?

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Discussion Overview

The discussion revolves around selecting the appropriate voltage option for a high-speed spindle being purchased from Italy, specifically considering the implications of using either 220V or 380V with a single-phase power supply in the UK.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests that 220V is the appropriate choice since it is the single-phase voltage typically used in the UK.
  • Another participant questions whether a Variable Frequency Drive (VFD) previously discussed would influence the voltage selection, implying that the VFD's output could be a determining factor.
  • A different viewpoint notes that the UK system is likely a 220/380Y, 3-phase, 4-wire system and discusses the implications of using either voltage, including the need for different circuit breakers and potential benefits of using the higher voltage option for smaller conductors and equipment.

Areas of Agreement / Disagreement

Participants express differing opinions on the appropriate voltage choice, with no consensus reached on which option is definitively better for the user's situation.

Contextual Notes

There are assumptions regarding the compatibility of the spindle with both voltage options and the existing electrical infrastructure, which remain unresolved.

Icestation2
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I am buying a high speed spindle from a company in Italy. They have two different voltage options available for the spindle which are either 220 or 380. I operate my CNC router using a single phase power supply. Can anyone confirm which voltage option I should go for.

My business is located in the UK.
 
Last edited:
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Icestation2 said:
I am buying a high speed spindle from a company in Italy. They have two different voltage options available for the spindle which are either 220 or 380. I operate my CNC router using a single phase power supply. Can anyone confirm which voltage option I should go for.

My business is located in the UK.

:smile: Hi, in my opinion you should go for 220V supply. It is single phase voltage between phase wire and neutral wire in the UK, if I'm not mistaken!
 
Last edited by a moderator:
Well your system in the UK is probably a 220/380Y, 3ph, 4w, system correct? Your single phase power supply has both Voltage connection options? If so, then using the higher Voltage would allow you to use smaller conductors and equipment, except that the 380V option would require a 2 pole circuit breaker, the 220V a single pole breaker. If the equipment you have in place will work with both voltages, it is just a matter of selecting the most economical installation option.
 

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