connecting open sprinkler to 3phase centrifugal pump

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July 12, 2014 at 12:59 pm #23049

abdoz
Participant

Greetings,

I purchased 3 opensprinklers last April,

I have a farm with a 3 phase centrifugal pump with the following details,
Ebara Pumps 3M 40-200/7.5
http://www.ebara-pumps-online.com/acatalog/Ebara-Pumps-3M-40-200-7.5-364.html

And controlled with push button to on/off the pump, through Motor (Phase) Protection Relays: http://krk.com.tr/urunler_eng.asp?islem=detay&ID=280&aID=&kID=

I just want to know how to connect the pump to the sprinkler, I know that station one for master which a pump can be connected to.

Best regards,

July 13, 2014 at 3:41 pm #27561

abdoz
Participant

Hi Everybody,

I just want to make sure if I need any external 24VAC start relays, to be connected to the water pump or not.

BR,

July 15, 2014 at 5:12 am #27562

Ray
Keymaster

I took a quick look at the datasheet and looks like the pump runs on either 230V or 380V. It can’t be directly connected to OpenSprinkler as a station (because each station only outputs 24V AC). Instead, you will need a pump start relay. If you are in the US, you can buy a pump start relay on Amazon or local home improvement stores. For example, this seems to work well:
http://www.amazon.com/Orbit-57009-Sprinkler-System-Horsepower/dp/B000I19I5E
Do make sure to check the horse-power ratings.

July 15, 2014 at 3:09 pm #27563

abdoz
Participant

Thanks Ray for your reply,

Pump power rating is 7.5 kW – 10 HP

I guess this start relay will not work, what do you see.

July 18, 2014 at 8:55 pm #27564

Ray
Keymaster

7.5kW, 10HP? That’s a beefy pump. The Orbit one clearly doesn’t work. You may have to search ‘pump start relay 10HP’ and see the available options.
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