question

Mark Moussa avatar image

3-phase Star supply to 3-phase Delta load

Hi,

In the Phoenix inverter manual I could read that the Phoenix is not suitable for delta configuration when used in 3 phase.

I am questioning the possibility to feed a 3-phase delta load from a 3-phase star source made out of 3 Phoenix inverters ?

Is that possible or there are any concerns ?

Kindly advise.

Thank you

3 phase
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1 Answer
Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @Mark Moussa

This is not possible, you'll have to use a transformer if you want to make this work.

The inverters have / need a fixed N-E connection so only Y topology works.

-edit- the load can be delta, so it does work, but the inverters themselves cannot be connected in delta. so your load has to be 400 VAC Delta (when using 230VAC inverters)

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Thank you @Daniël Boekelfor your answer.

In that case, even using star-delta starter with the motor cannot solve the issue ?

Hi @Mark Moussa

Oops..I seem to have misread your question!

Yes, a load can be 3 phase delta, no problem.

If the load is a motor, make sure to have enough capacity for starting it, for a bigger motor, a star-delta switch (or a variable frequency drive) can help starting up the motor easier.

Mark Moussa avatar image Mark Moussa Daniël Boekel (Victron Energy Staff) ♦♦ ·

Great. Thank you for your prompt response