Two Pumps in the Desert

[waleed]

Hello ,

I have two pumps , which I want only one to be ON at any given time. The pumps are triggered by several event , i.e. tank empty , irrigation pressure (manual open one of the valves) , irrigation controller.. etc.

I am thinking of using two ON delay timers with say 2 min. on delay on each pump , the timer will connect to the AB of the pump contractors. Now if the input to the timer X is on , the other will be off and vice versa.

So if one of the pumps (well) is already on , and I tried to switch on the other pump (booster) , the well pump will be immediately switched off and the booster pump will be on after 2 min.

Will this work ? Is there a better way to control the pumps ?

Many thanks for such great forum and great people ..

 

[waleed]

All you need is a n/o n/c contactor

Wonderful , many thanks , that what I was looking for , a simple smart solution cost effective and does not require dedicated professional

 

[waleed]

How many possible events are there?
Are you familiar with PLC's?

Yes I am , we have many in our manufacturing facilities , however the location of my farm is in a remote area with which it is hard to source a professional , thank you

 

[waleed]

The last thing you'd want to do in Saudi, is to complicate things. This installation is already suffering from other problems, outlined in another thread by the same OP!!

The current installation is perfectly OK , the 30HP submersible pump with its Schneider control panel is working fine. The only thing here is that I have acquired a new land with which I need the addition of the booster pump. As for Saudi Arabia, you may need to read more on the country's development.
Thank you

 

[waleed]

I assume you have a header tank/reservoir, if this is the case use a run till full float for that and use solenoid operated valves to divert the water to where you it.

I already have a tank with float switch that turns off the well pump with the tank is full and on when it is off. And that is one of the events that can trigger an action that is "not controlled" which I need to take precaution.

thank you

 

[waleed]

Usually we supply a booster pump via its own safety low-level controller to prevent dry run, we also use this control to activate any alarms required. We fit a separate level controller for the borehole pump that fills the tank. we sometimes also interlock the borehole pump with the low-level safety control unless there's probes down the borehole itself.

A float switch is already planned , which will protect the booster pump from running dry. However it should not be the same valve for well pump , because I need an "extra" water in the tank for disasters like electricity power down. This buffer will be used to irrigate sensitive plants.

Thank you

 

[ian.settle1]

The current installation is perfectly OK , the 30HP submersible pump with its Schneider control panel is working fine. The only thing here is that I have acquired a new land with which I need the addition of the booster pump. As for Saudi Arabia, you may need to read more on the country's development.
Thank you

Think you need to say sorry to Eng54 as he worked in your region of the world for a number of years and was one of the people who helped develop your country before he went to China

 

[waleed]

I would like to thank you all for your kind participation and ideas ..

Here is the design , correct me if any thing is missing :

Well pump is ON in the events of
1. Float switch is closed (i.e. tank is half empty)
2. Irrigation controller switch it on (we are to schedule the well pump during the day and booster pump during the night to minimize evaporation).
3. The N/C on the "central" contractor is closed (i.e. the booster pump is off), as suggested by rapparee.


Booster pump is ON in the events of
1. Float switch2 is closed (i.e. tank is is not empty)
2. Irrigation controller (or a farmer) open one of the solenoid valves with which the pressure switch connected to the "central" contractor will be triggered (The booster pump to run during the night to minimize evaporation). The N/O on the "central" contractor is closed thank you rapparee

Both pumps will have an ON delay timer (2 min.) to be sure we don't have issue with Amps ?

 

[waleed]

Think you need to say sorry to Eng54 as he worked in your region of the world for a number of years and was one of the people who helped develop your country before he went to China

I already thank Eng54 for his participation , as for saying sorry , I don't see a reason to apologize I only recommended him to read more on Saudi Arabia Development. I would like you to also kindly read on the subject , believe me it is not so "Bad" here. We may try to stick to the topic as per the forum rules.
Thank you

 

[Des 56]

waleed
Please do call again as soon as you need greater expertise than is available to you
I'm sure the ones who spent their time in order to help you in this thread will be overjoyed with the gratitude you have shown them

 

[Geordie Spark]

Two plugs and one socket ........ simple. :1eye:

 

[PEG]

Two plugs and one socket ........ simple. :1eye:

...And after ALL the technology,diplomacy,and politics...it takes a Geordie to bring it back to a good old threesome joke :joker:

 

[TJ Anderson]

Is the title to this thread the Arabian version of Fifty Shades of Grey?

 

[Jonspark]

Is the title to this thread the Arabian version of Fifty Shades of Grey?

Tel's gunna be well jel he didn't write that one

 

[Silly Sausage]

...And after ALL the technology,diplomacy,and politics...it takes a Geordie to bring it back to a good old threesome joke :joker:

Two holes short though!

 

[Knobhead]

I see the idiots are flocking in to roost.