Float switch with start stop override - Page 2 - Electrician Talk - Professional Electrical Contractors Forum

Ray Cyr · 10-08-2009, 04:41 PM

In rereading the whole thread, I agree with those who said to use a hand-off-auto switch. The "hand" contacts would go directly to the motor starter and the "auto" contacts would go to the float switch and then to the motor starter.

mattsilkwood · 10-08-2009, 07:14 PM

Quote:

Originally Posted by John Valdes

This is how I would have drawn this circuit. I did not draw the OLR. I usually put it between the starter coil and the neutral. Yes, the neutral.

The only way you can shut that off is with the stop button. It will burn the pump up.

Ray Cyr · 10-08-2009, 08:11 PM

Quote:

Originally Posted by John Valdes

This is how I would have drawn this circuit. I did not draw the OLR. I usually put it between the starter coil and the neutral. Yes, the neutral.

This would actually depend upon the voltage rating of the starter coil and the type of system feeding it.

mattsilkwood · 10-08-2009, 09:31 PM

float switch.jpg
This is what i came up with but I would use a HOA.

Of course if you are useing line voltage for your float switch you can remove R1 and put the float in where the NO R1 contacts are.

pudge565 · 10-08-2009, 10:26 PM

Quote:

Originally Posted by mattsilkwood

Attachment 1945
This is what i came up with but I would use a HOA.

Of course if you are useing line voltage for your float switch you can remove R1 and put the float in where the NO R1 contacts are.

Ok I will see if this is what my instructor is looking for. On a side note when you want perfectly straight lines in paint hold down the shift key while making it and it will be perfectly straight.

mattsilkwood · 10-08-2009, 11:20 PM

I didn't label R3 on the first one.[ATTACH]1948[ATTACH]

Toronto Sparky · 10-09-2009, 04:33 AM

delete

mattsilkwood · 10-09-2009, 08:15 AM

float switch.jpg
The first drawing is wrong, I couldnt figure out how to change it on here.

lectricboy · 10-09-2009, 08:22 AM

Quote:

Originally Posted by pudge565

Ok I had misunderstood the instructor. He does want it to over ride the closed float switch. That way if it stuck closed and was pumping dry you could shut it off.

Then an HOA is the way to go.

John Valdes · 10-10-2009, 06:24 PM

What are you guys using for the drawing software? I need something.

mattsilkwood · 10-10-2009, 06:48 PM

Quote:

Originally Posted by John Valdes

What are you guys using for the drawing software? I need something.

Paint.

lectricboy · 10-12-2009, 07:47 AM

Quote:

Originally Posted by John Valdes

What are you guys using for the drawing software? I need something.

I use Visio.

Toronto Sparky · 10-12-2009, 12:38 PM

Meanwhile the water is running all the way down the street by now.

mattsilkwood · 10-12-2009, 07:53 PM

Quote:

Originally Posted by Toronto Sparky

Meanwhile the water is running all the way down the street by now.

That's what the stop button is for.

pudge565 · 10-12-2009, 11:14 PM

LOL well he has to ask the student that asked for help on this one where he found the requirements for it because we have not found it in the motor control books we have.