Pump alarm and shut off system

[Ron52]

Presently I have an effluent pump in a remote septic tank that activates from the pump float switch. A current sensor in the house will energize a piezo buzzer indicating that the pump is running and does shut off. A normal pumpout would be around the 10 minutes.
I would like to have a system that allows the pump to shut down after about 20 minutes if the float isn't working properly or the pump isn't working properly thus saving the pump from running until it burns out ( that happened to me once) . I would then like a warning alert that the pump has failed and continue to alarm until power is shut off to the pump and float. It isn't feasible ( without much cost) to run a wire to the septic tank and float switch which would make it a more simple solution. I have attached a diagram of the present setup.
Hopefully some of you will have some ideas. Thanks.

 

[Minder]

Seems as though you could use the current sensor to trigger an ON-Delay timer set for 20min, the timer relay could open the line to the pump, simultaneously latching a relay with a contact also feeding what ever alarm you wished.
M.

 

[Alec_t]

Does the float switch sense high or low level or both?

 

[Ron52]

Seems as though you could use the current sensor to trigger an ON-Delay timer set for 20min, the timer relay could open the line to the pump, simultaneously latching a relay with a contact also feeding what ever alarm you wished.
M.

Thanks for you quick response. I'm not an electronics person so not sure how a ON-Delay timer works. So the power source would be connected to the timer so would that timer have to be in a normally closed position? If the float switch hasn't disconnected after 20 minutes then the timer relay would cut the power to the pump? Would then not the timer reset to normally closed and continue with the same sequence. Excuse my ignorance.

 

[Ron52]

Does the float switch sense high or low level or both?

The float switch detects high level and cuts in pump until the float reaches the low position and cuts out pump like a normal sump pump set up.

 

[Minder]

Thanks for you quick response. I'm not an electronics person so not sure how a ON-Delay timer works. So the power source would be connected to the timer so would that timer have to be in a normally closed position? If the float switch hasn't disconnected after 20 minutes then the timer relay would cut the power to the pump? Would then not the timer reset to normally closed and continue with the same sequence. Excuse my ignorance.

The idea I had is to set the timer on when the output of the current sensor is on the relay starts to time for 20m, If less, then the timer resets, if 20m then the timer times out and latches in a relay which opens the line to the pump, it would also set the alarm which stays on until the system is reset manually etc.
M.

 

[Ron52]

The idea I had is to set the timer on when the output of the current sensor is on the relay starts to time for 20m, If less, then the timer resets, if 20m then the timer times out and latches in a relay which opens the line to the pump, it would also set the alarm which stays on until the system is reset manually etc.
M.

Thanks for the info and now I need to study your information on the different timers. I understand what you mean now and just a matter of getting my head completely around it and ordering the proper timer and relay. Thanks again and much appreciative of your answer.

 

[Minder]

For circuits in general, latching in relays with contacts/P.B.s etc, there is this.
Telemecanique wiring diagrams
Max.

 

[Ron52]

For circuits in general, latching in relays with contacts/P.B.s etc, there is this.
Telemecanique wiring diagrams
Max.

Thanks a lot!

 

[32Vwasbetteronboats]

I would think it would be easier to take apart one of these automatic pumps already designed to do all that current sensing and timing and modify it for a different pump.

Maybe

 

[Ron52]

I would think it would be easier to take apart one of these automatic pumps already designed to do all that current sensing and timing and modify it for a different pump.

Maybe

Thanks for your suggestion. I need an effluent pump however and even this type of pump would not allow me to know if it was working or not from a remote location. I think the modification would be terribly hard to do with an effluent pump. I do appreciate your help.

 

[32Vwasbetteronboats]

http://www.data-command.com/applications/lift-station-monitoring/

Monthly payments like a "free" home security system !!

Maybe look at stuff they use in farming , those guys always pumping and watering stuff.

www.google.com/search?q=greenhouse+computer+control+system