Alternety
Like an engineer
Does anyone know of a pressure switch I can use with my well system that OPENS the contacts to run the pump and closes them to stop?
Reversed pressure switch
- Thread starter Alternety
- Start date
Seekonk Supply
New Member
- Messages
- 2
- Reaction score
- 0
- Points
- 0
I'm confused. How is electricity going to flow, with an open circuit?
Sponsor
Paid Advertisement
R
Rancher
Guest
Sure, just use the contacts to operate a relay, or pump contactor, what you want is a double pole double throw relay, which means you have contacts for either normally open or normally closed, any contractor electrical supply house will have what you need.alternety said:
Rancher
Speedbump
Active Member
May I ask why?
bob...
bob...
Bob NH
In the Trades
Go to www.grainger.com and look at stock numbers 6B452, 5B416, 2FG93, 1V630, And 6B437. Perhaps one of them will suit.alternety said:
Speedbump
Active Member
Boy! are they proud of their products!
Alternety
Like an engineer
One of the Square D units looks good.
The reason - the motor control uses an open circuit to run. I am not sure why they did that; but they did. The power does not flow through the pressure switch contacts; just a control current.
Rancher - I know. I just want something that looks "regular" to handle it. I have other things to joust with.
The reason - the motor control uses an open circuit to run. I am not sure why they did that; but they did. The power does not flow through the pressure switch contacts; just a control current.
Rancher - I know. I just want something that looks "regular" to handle it. I have other things to joust with.
R
Rancher
Guest
Can you tell us what the motor control looks like, it seem like you probably have what you already need to do the job.alternety said:
Rancher
Alternety
Like an engineer
It is a Baldor BC140. It supplies variable speed DC motor control. It supplies up to 180 VDC at about 11 A.
I am going to check with the factory and see if there is another point inside that would accept the close to run signal. There is a set of pins that allow that but they don't actually remove power from the motor when it is stopped. I found this out experimentally. The motor hums when it is "off".
I am going to check with the factory and see if there is another point inside that would accept the close to run signal. There is a set of pins that allow that but they don't actually remove power from the motor when it is stopped. I found this out experimentally. The motor hums when it is "off".
Bob NH
In the Trades
What happens if you use a switch in the normal way to simply disconnect power from the thing that is giving AC to the controller? I guarantee it won't run if there is no AC.
Alternety
Like an engineer
Switching the DC would circumvent the soft start and I don't believe they recommend switching the output. Switching the input would work but I just have the feeling that it would be better for the controller if it did not keep turning it on and off. I am not sure how soft start will react to this approach either.
I also have to implement low water protection. The source of this signal is a low voltage relay contact. It is a double throw so there is not a problem.
I would really just rather use the provided control points in the controller.
I also have to implement low water protection. The source of this signal is a low voltage relay contact. It is a double throw so there is not a problem.
I would really just rather use the provided control points in the controller.
Similar threads
