LED to monitor motor

Marnhullman · 24 May 2020

I have a water treatment plant in my garden that, in winter and bad weather, I do not monitor as frequently as I probably should. The pump should run constantly 24/7.

The unit is isolated by a fused spur which, currently, does not have an led but I am going to replace it with one that does. If the pump in the treatment plant should fail will the led go off or does the led just indicate that the power supply has failed? I would like to be able to monitor the pump remotely.

Advice appreciated.

RF Lighting · 24 May 2020

The indicator on an FCU just indicates the presence of power at the FCU. It would extinguish should the fuse in the FCU blow, but it will not tell you if the pump has stopped operating for a different reason.

You can use a current monitoring relay to tell you if the pump is actually running, and use this to trigger some sort of signalling device such as a light, buzzer or something which notifies your mobile phone.

winston1 · 24 May 2020

RF Lighting said:
You can use a current monitoring relay to tell you if the pump is actually running,

No you can't. A stalled motor will still draw current.

flameport · 24 May 2020

winston1 said:
A stalled motor will still draw current.

That is true, but the current for a stalled motor is entirely different to normal operation so both non functioning and stalled are easily detected.

oceansoul · 24 May 2020

What you need, is to be monitoring the flow that is being pumped. What is being pumped and what pipe size?

RF Lighting · 24 May 2020

winston1 said:
No you can't. A stalled motor will still draw current.

Wrong as normal Winston, and as usual you have not added anything useful to this thread at all.

Why not suggest a better alternative if a current monitoring relay can’t be used? (It can)

Taylortwocities · 24 May 2020

Flow switch on pump outlet.

Meerkat

Taylortwocities
11 Dec 2009
53

Simples.

SUNRAY · 24 May 2020

Taylortwocities said:
Flow switch on pump outlet.

Meerkat

Taylortwocities

11 Dec 2009

53

Simples.

I find a differential pressure switch across the pump is more reliable.

SUNRAY · 24 May 2020

winston1 said:
No you can't. A stalled motor will still draw current.

Oh yes he can...

winston1 · 24 May 2020

RF Lighting said:
Wrong as normal Winston

FOR GOD'S SAKE. I'M NOT WRONG. A stalled motor will still draw current. What is more it will be a large current as there will be no back EMF. You obviously know nothing about electricity and magnetism.

Read Flameports post. Tell him he is wrong as well instead of picking on me.

RF Lighting · 24 May 2020

You do know that current monitoring relays also operate on over current don’t you?

Flameport is not wrong. Just you.

JohnW2 · 24 May 2020

Taylortwocities said:
Flow switch on pump outlet.

I would say that's actually the best solution - since, in the final analysis it is presumably water flow which actually matters to the OP.

One can (despite winston's attempt to confuse) use electrical methods to detect whether or not the pump motor is running fairly normally but, at least in theory, the fact that a pump's motor is functioning normally does not guarantee that water is being pumped satisfactorily (anywhere, or to where it is meant to be being pumped).

Kind Regards, John

winston1 · 24 May 2020

RF Lighting said:
Flameport is not wrong. Just you.

I am NOT wrong. This is what Flamepot said, "That is true"

He agrees with me. Either we are both wrong, or we are both right.

You are deliberately picking on me accusing me of being wrong when I am not. Were you the classroom bully at school?

RF Lighting · 24 May 2020

winston1 said:
FOR GOD'S SAKE. I'M NOT WRONG. A stalled motor will still draw current. What is more it will be a large current as there will be no back EMF. You obviously know nothing about electricity and magnetism.

Read Flameports post. Tell him he is wrong as well instead of picking on me.

Extract from the technical data sheet of a Schneider branded current monitoring relay which you say can not be use to detect a stalled (jammed) motor.

winston1 · 24 May 2020

JohnW2 said:
(despite winston's attempt to confuse)

Not really, I just stated that a stalled motor would still draw current.

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

LED to monitor motor

Similar threads