Can three-phase 220V power be used to power single-phase 220V devices?
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The generator outputs three-phase 220V, meaning the voltage between L1, L2, and L3 is 220V. The voltage between L and N is 110V. The electrical appliances require 220V single-phase power; what is the correct wiring method? Some people say that it is sufficient to connect any two of the L1, L2, L3 live wires to the electrical equipment; in other words, there is no true neutral wire in practice. The neutral wire is also charged. That is, the voltage between L and N is 220V. The voltage between L and PE is 110V, and the voltage between N and PE is 110V. Will this wiring method have an impact on the use of electrical appliances such as single-phase 220V air conditioners? There is another question: can the lights also be connected using any two of the live wires from L1, L2, and L3?
This is interesting. I think the lights can be used, but first it’s necessary to determine the purpose of the neutral wire in other devices; it’s best to use an isolation transformer.
This is a problem I encountered in Saudi Arabia while abroad; I hope experts can share their opinions!
I consulted an electrical designer and a field technician, and they said it’s possible to do this.
A isolation transformer is added; the primary side uses line voltage, while the secondary side generates a ground and neutral wire. DYN wiring
This post was last edited by /ty/ty/ty on 2019-9-28 at 20:24. Remember, in marine power supply systems that use this type of ground-insulated power supply method, it is necessary to install online insulation monitoring instruments, and the equipment must be properly grounded. The main purposes are to prevent electric shock and ensure power supply reliability.