Connect a Guinard Kietis single-phase pump to three-phase 220 V for use on a VFD

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Connect a Guinard Kietis single-phase pump to three-phase 220 V for use on a VFD




by Christophe » 06/09/22, 15:10

Generally it is the opposite that seeks to do: feed a tri pump in mono ... well me it's the opposite! : Cheesy:

In order to be able to use my 220V AC three-phase output VFD (see electricity-electronics-computers/who-would-have-already-used-a-vfd-to-simulate-three-phase-from-220v-t17282.html ) to vary the speed of rotation and especially the power of my solar pump, I would need to rewire it in three-phase 220V.

It is a single phase pump,

In your opinion, is it possible by seeing these photos of the single-phase wiring?

20220906_125228.jpg


20220906_125444.jpg
20220906_125444.jpg (451.62 KB) Viewed times 403


It is currently wired on three-phase 127V without neutral (= 230 V between phase, without neutral).

When cold I would have done this:

cablage_triphase_pompe_guinard_monophasée.jpg


Provided that the cable that goes into the motor and comes out is only a thermal...(which I think...)

Do you validate? Otherwise a little help would be welcome! Thanks Zamis!
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Re: Connecting a Guinard Kietis single-phase pump to three-phase 220 V for use on a VFD




by Macro » 06/09/22, 15:30

When cold, yes... When hot, check the direction of rotation...
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Re: Connecting a Guinard Kietis single-phase pump to three-phase 220 V for use on a VFD




by Christophe » 06/09/22, 17:39

Cool so that looks good! 8) You see that we can agree on the technique! : Mrgreen:

So for the meaning I thought about it: no chance of knowing the right one before trying! (I believe)

There is a reverse mode on the VFD...or more simply I reverse 2 of the 3 wires at its output...

The rewiring of the pump will impose to put it down because I only have 10 cm with the ceiling, sucks...

The pump is not primed at startup so if it turns upside down I don't think there is any risk of breakage (not necessarily true if it was primed)...
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Re: Connecting a Guinard Kietis single-phase pump to three-phase 220 V for use on a VFD




by izentrop » 06/09/22, 18:04

Check the resistance of the windings with an ohmmeter:
If all three are the same, that should do it, but usually the start winding doesn't carry the same current. It consists of a wire with a smaller section than the main winding (its
resistance is therefore higher).
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Re: Connecting a Guinard Kietis single-phase pump to three-phase 220 V for use on a VFD




by Christophe » 06/09/22, 18:05

Alright I'll do that, is that the one wired to the capacitor?

And if it's not good, what do I risk? How many % margin am I entitled to?
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Re: Connecting a Guinard Kietis single-phase pump to three-phase 220 V for use on a VFD




by izentrop » 06/09/22, 19:06

In general, single-phase motors have only 2 windings

All setups: https://sites.google.com/site/rebobinag ... monophases
The only one that might fit is 08.
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Re: Connecting a Guinard Kietis single-phase pump to three-phase 220 V for use on a VFD




by Christophe » 06/09/22, 19:10

I'm going to measure the Ohms...we'll see...

I have another single-phase pump which is three-wired...there's a double diagram on the cover that explains it so I think it's not that rare.

And guinard does three-phase push-ups...fingers crossed...

Otherwise, simpler, with the value of the capacitor we can know if it is a tri or mono winding??
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Re: Connecting a Guinard Kietis single-phase pump to three-phase 220 V for use on a VFD




by izentrop » 06/09/22, 20:20

Christophe wrote:Otherwise, simpler, with the value of the capacitor we can know if it is a tri or mono winding??
DON'T
Found in 2 seconds https://jadengineer.com/calcul-capacite ... -en-ligne/
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Re: Connecting a Guinard Kietis single-phase pump to three-phase 220 V for use on a VFD




by Christophe » 06/09/22, 21:20

What no ? Then yes ?

Thanks for the link, in three-phase it's between 45 and 53 µF... in mono it's 43 µF...

2µF difference doesn't matter...I'll look at the value...if I have a 50 µF, then it's a three-phase winding?
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Re: Connecting a Guinard Kietis single-phase pump to three-phase 220 V for use on a VFD




by Christophe » 06/09/22, 21:36

Uh it's a 10µF for a 670W motor : Mrgreen: ...I get it quedale...anyway I never understood anything about these filthy electric motors! : Lol: : Lol:
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