Transformer Connections

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Lino

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Philippines
I have a 400/230 volts, 3-phase, 4-wire installations. There were single phase appliance loads rated at 230 volts single 2 wires. However, there are also appliance loads that are rated 230/115 volts suitable for a single phase 3-wire. Will it be possible for those appliance rated 230/115 volts, single phase 3-wire to be connected to the branch circuit of a 4oo/230votls, 3-phase, 4-wire since the single phase branch circuit would be rated at 230volts, 2-wire? Please clarify. Many Thanks.

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Jraef

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San Francisco Bay Area, CA, USA
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Electrical Engineer
I have a 400/230 volts, 3-phase, 4-wire installations. There were single phase appliance loads rated at 230 volts single 2 wires. However, there are also appliance loads that are rated 230/115 volts suitable for a single phase 3-wire. Will it be possible for those appliance rated 230/115 volts, single phase 3-wire to be connected to the branch circuit of a 4oo/230votls, 3-phase, 4-wire since the single phase branch circuit would be rated at 230volts, 2-wire? Please clarify. Many Thanks.
If the appliance is required to receive 230/115V single phase 3 wire, then no, you cannot do it with your system. Not only that, but because 230/115V is a North American specification, the frequency will be different. Only the appliance mfr can clear this up for you. Call them.
 
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