Pumps running confirmation

[Darkwood]

You can get adjustable ones spin and they have the added bonus of ensuring waterflow so if any restrictions occur its seen, differential pressure switches also can be adjustable but that cant always tell a blocked flow as the pressure can still remain high.

A faulty valve or blockage wont be seen by most sensors as the motor will keep going and just cavitate (in some cases this reduces current demand of motor believe it or not as the cyclonic water assists the motor)...

 

[grantr37]

Hi team,
Control panel for 2 submersible pumps, duty, assist.

Need to come up with something to confirm pumps running, not just signal to do so.
Was thinking ct on the outgoing connections but I would need a pair of voltage free contacts from this to create a confirmation signal.
Is there a Siemens or similar module known to do this?

Thanks,

Boydy

Hello, what are the pumps being used for? I ask this as every usage has a different possible solution/improvement that can be applied to it......will help me to work out what you might want to find out about....


grantr37

 

[guest119]

Sorry, been drip feeding info, should have started with the big picture.

Factory sewage wet well.
2 pumps (duty-to a certain level. assist-at higher level) submersible Flyght pumps.
Float switch operating at overflow pipe spill level currently sending its own alarm.
Pumps send the ---- on to the street sewer.
No access to pumps or valves, no mechanical solution.


Problem.

Float sending too many alarms.
No alarm required in bad weather when the spill will be mostly clean/rain water and the pumps are just not keeping up but will eventually.
Alarm required when float operates and pumps wont obey ultrasonic run command, ie mains fail or both switched off downstream or both ragged up and tripped their overloads.
Analogue wont work in mains fail.

Available alarms

Well high.
Well spill (float)
Pump running/stopped
Pump available/not available (stop selected,or not)
Pump tripped/not tripped
Mains fail


Thanks for current support,

Boydy

 

[Darkwood]

This poor setup requires a re-draft of the control system and possible redesign its flawed in many ways by the sound of it as it dosn't really operate correctly in all conditions hence they are just adding sensors to try give more indication if its working and although it might give a little more info its not going to address the operational issues and its something i couldn't do on a forum ... even with the info supplied

Good luck

 

[guest119]

Just to add instead of edit of above.
A spill generates a hefty fine therefor need the float to call out only on a ---- spill, not a dilluted spill.

Boydy

 

[Darkwood]

Well sounds like this needs a complete new control system to address the problems rather than adding extra indicators and no offense meant but because of the opening question you asked i would assume its out of your field of experience ...by all means add the indicators as asked but dont get any deeper because you may become liable on any alterations that dont work as expected and with fines been handed out you want to avoid any blame.