Understanding 3-pin vs 380/415V Electrical Supply

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SUMMARY

The discussion centers on the differences between 3-pin (UK) electrical supply and 380/415V three-phase systems. It confirms that while converting single-phase to three-phase is technically possible, it is costly and complex, involving DC conversion and pulse width modulation. In countries like Australia and the UK, domestic supplies can access three-phase power at street level, with a typical voltage of 415 volts between phases. This setup may be suitable for equipment requiring 380/415V supply.

PREREQUISITES
  • Understanding of 3-phase electrical systems
  • Knowledge of voltage levels and phase differences
  • Familiarity with pulse width modulation (PWM) techniques
  • Basic electrical wiring and supply concepts
NEXT STEPS
  • Research the process of converting single-phase to three-phase power
  • Learn about the specifications and requirements for 380/415V equipment
  • Explore the implications of using pulse width modulation in electrical systems
  • Investigate local regulations and options for upgrading to three-phase supply
USEFUL FOR

Electrical engineers, technicians working with industrial equipment, and homeowners considering upgrades to their electrical supply systems.

vultac
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Hi Guys,

Im staying in a country that has 3-pin (UK) electrical supply.

I recently come across one of my equipment that need 380/415V 3ph 50hz 4 wire supply.

Please advise isit possible to hook them up? what's the difference.
 
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It is possible to convert single phase to 3 phase, but it is expensive to do this.

It involves converting the single phase to DC then chopping the DC into three streams of pulse width modulation, each 120 degrees apart.

So, you wouldn't do it unless you really had to.

However, the domestic supply in Australia (and probably the UK) is 3 phase at street level and one of the phases is brought into houses with a neutral. By paying extra, you can get all three phases brought into the house.
The voltage between phases is 240 * √3 or 415 volts.
This might be suitable for your machine.
 

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