Dual voltage 3 phase wiring

Dual voltage 3 phase wiring

This topic has 7 replies, 3 voices, and was last updated 2 September 2020 at 16:48 by Steviegtr.

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1 September 2020 at 21:22 #493776
Richard Cox
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@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
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1 September 2020 at 21:22 #32133
Richard Cox
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@richardcox82602
1 September 2020 at 21:32 #493779
Emgee
Participant
@emgee
Configure to High voltage by swinging the links over, make sure he has a suitable starter but you don't mention HP.

Emgee
1 September 2020 at 22:16 #493784
Richard Cox
Participant
@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
1 September 2020 at 23:56 #493797
Emgee
Participant
@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
2 September 2020 at 07:40 #493804
Steviegtr
Participant
@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.
2 September 2020 at 08:40 #493809
Richard Cox
Participant
@richardcox82602
Hi Steve

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

Rich
2 September 2020 at 16:48 #493897
Steviegtr
Participant
@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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