AC Submersible Pump

[AlamoSolar]

jon - tell us about your qualifications to be making recommendations?

Consider using Grundfos SQ pumps to eliminate the startup load issue. Or create your own similar system with a VFD, 3 phase motor and a controller.

I'm trying to connect an ABB VFD with a solar firmware version to power a 3HP 3 phase pump.

Anybody has any experience with that?

[russ]

Consider using Grundfos SQ pumps to eliminate the startup load issue. Or create your own similar system with a VFD, 3 phase motor and a controller.

jon - tell us about your qualifications to be making recommendations?

[jon_r]

Consider using Grundfos SQ pumps to eliminate the startup load issue. Or create your own similar system with a VFD, 3 phase motor and a controller.

[Jigar]

AC pump

i have 2 X 3HP Falcon submersible pumps and want to run Solar On Grid. Could anyone help me how much watt solar panel, how much kwh inverter will require and other parts ?

For single 3 Hp pump
solar panel-2.5Kw
Inverter -3KVA

Mod note - No advertising allowed

[ananthapriya]

This program is will work very well and you do not have to any changes in current installation and you can directly connected to existing pump. Its better you go for such system.

[russ]

The company has not provided the pump curves. They say they designed it as a CSR initiative and have installed them in remote areas in Africa which are not grid connected. However, the response to the product has compelled them to commercialize it. However, they say they do not have the pump curves.

This is some fly by night outfit that was into manufacturing ladies knickers last week? If they don't even have a pump curve they have designed nothing but simply repurposed the product of some other party.

[green_regards]

Motor reduced = pumping reduced. The Pump Curves become all important.

The company has not provided the pump curves. They say they designed it as a CSR initiative and have installed them in remote areas in Africa which are not grid connected. However, the response to the product has compelled them to commercialize it. However, they say they do not have the pump curves.

[SunEagle]

Like I said, it will never work with a single phase pump motor. The link is for a VFD controller, and it can manage the available solar power, and run the 3 phase motor at reduced capacity.
Motor reduced = pumping reduced. The Pump Curves become all important.

You also have to watch the speed of the motor. If you go too slow the natural cooling affect is negated because the fan blade connected to the motor shaft is turning too slow. Most TEFC motors don't like to go slower than 20 Hz or about 1/3 normal speed for any length of time without external cooling.

[Mike90250]

Like I said, it will never work with a single phase pump motor. The link is for a VFD controller, and it can manage the available solar power, and run the 3 phase motor at reduced capacity.
Motor reduced = pumping reduced. The Pump Curves become all important.

[Brijesh]

I have enclosed the solar panel requirements as specified by Schneider, again as a pdf file.
[ATTACH]2752[/ATTACH]

Green Regards.

Thanks for update !!!

[green_regards]

I have enclosed the solar panel requirements as specified by Schneider, again as a pdf file.
Solar PV Panel ratings.pdf

Green Regards.

[FloridaSun]

I have enclosed the details of Schneider Electric VFD and solar panel ratings for various motor capacities. However, they do not mention the need for batteries. Also, a few systems have been installed using these drives and panel wattages and apparently they are working fine (have not seen them personally. checked them on youtube.) Have I missed something? Or is there any difference in the actual performance V/S their claims?
[ATTACH]2750[/ATTACH] [ATTACH]2749[/ATTACH]

Thanks in advance for any clarification,

Green Regards

interesting link... I downloaded what I thought was the 'solar sizer' (but maybe it's not) from Schnieder-electric and see a basic schematic that shows no battery but still can't figure out panel requirements. It needs a 200volt source?
Wating to hear more from the experts here.......

[green_regards]

A single phase, 4KW inverter, will NEVER power a 3HP pump to full power. Using a 1:3 VFD as a soft start, you may get it to run, but the losses in a single phase 3hp motor, would require nearly 6KW to run it, and more to start it up. There are internal motor losses, Power Factor Losses and others you likely have not considered.

PV panels & inverter cannot run a motor directly, you need, as Naptown stated, batteries to stabilize the power.

I have enclosed the details of Schneider Electric VFD and solar panel ratings for various motor capacities. However, they do not mention the need for batteries. Also, a few systems have been installed using these drives and panel wattages and apparently they are working fine (have not seen them personally. checked them on youtube.) Have I missed something? Or is there any difference in the actual performance V/S their claims?
Altivar 312 Solar Catalog_drive details.pdf Solar PV Panel ratings.zip

Thanks in advance for any clarification,

Green Regards

[inetdog]

we get sunlight 8am. So my wish is to start my pump at 8am itself. it run 8hours a day. Money is not issue. But it should run in on grid system

If you get sunlight at 8am, that is not the same as saying that you will be getting a useful amount of power from the solar panels at 8am. There are web sites that will show you the panel output on an hour-by-hour basis through the day, but as a very rough rule of thumb if sunrise to sunset is 12 hours the KwH you get from the panels will be only about five times the Kw rating of the panels. We simplify that by saying that you have 5 sun hours during that 12 hour period.
But if you cannot run the pump at low power or use batteries, then what little power the panels start to produce at 8am will be wasted until the sun is high enough to actually run the pump directly.

[Mike90250]

A single phase, 4KW inverter, will NEVER power a 3HP pump to full power. Using a 1:3 VFD as a soft start, you may get it to run, but the losses in a single phase 3hp motor, would require nearly 6KW to run it, and more to start it up. There are internal motor losses, Power Factor Losses and others you likely have not considered.

PV panels & inverter cannot run a motor directly, you need, as Naptown stated, batteries to stabilize the power.