Dual voltage 3 phase wiring

[Richard CoxParticipant @richardcox82602]

evening all

quick question I have a three phase compressor that has been running off a 230v three phase inverter the motor was configured in delta, I’m lending it out to someone who has three phase on site, do I just swap the terminals to star configuration,

i guess what I’m trying to ask is dual voltage motor

if 415v then motor should be configured in star

if 230v then should be configured in delta

regards Rich

[Richard CoxParticipant @richardcox82602]

[EmgeeParticipant @emgee]

Configure to High voltage by swinging the links over, make sure he has a suitable starter but you don't mention HP.

Emgee

[Richard CoxParticipant @richardcox82602]

Hi emgee

it’s a 5.5hp no starter, so the u2 v2 w2 should all linked with the busbars/straps And the u1 v1 w1 should have the phases connected

Rich

[EmgeeParticipant @emgee]

Hi Richard

Best to use a starter with any motor, especially that size if running at 3 phase 415v, or better still leave it delta connected and send your inverter which hopefully has some fault and overload protection on the output.

Emgee

[SteviegtrParticipant @steviegtr]

Posted by Richard Cox on 01/09/2020 22:16:23:

Hi emgee

it’s a 5.5hp no starter, so the u2 v2 w2 should all linked with the busbars/straps And the u1 v1 w1 should have the phases connected

Rich

Yes. But do not just rely on an isolator for switching. They are not meant for that.

Steve.

[Richard CoxParticipant @richardcox82602]

Hi Steve

it will utilise the pressure switch on the compressor for stopping and starting

Rich

[SteviegtrParticipant @steviegtr]

Posted by Richard Cox on 02/09/2020 08:40:05:

Hi Steve

it will utilise the pressure switch on the compressor for stopping and starting

Rich

Steve.

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