Can I connect a 1000W with a 600w smart fan speed controller?

[AndreiBuzz]

Hi everyone,

I'm trying to have a clear view of is ok to connect a 1000W industrial fan to a 400W Tuya smart fan controller. I have some knowledge about the electricity but I'm not totally sure if it matters the switch load as long as the fan has is own capacitor.


I'm asking this as I cannot find to buy a smart controller for the fan above 600w load.

I got few crypto mining rigs and need them ventilated. I want the fan speed to be controlled via Smart Life app using automation feature linked to the smart thermostat. And set the fan speed according to the room temperature.

Got already in place this system using 200W industrial fans, but need bigger fans. So I need to know if is any danger connecting the 1000w fan to the 400W smart fan speed controller.

Thank you in advance!

 

[James]

No, a 1000w load can’t be connected to a controller that is rated less than 1000w

 

[MJPD29]

No its not ok

 

[AndreiBuzz]

No, a 1000w load can’t be connected to a controller that is rated less than 1000w

Thanks James.

I actually connected it and it seems to be working and I'm not saying I did the right thing.

I'm asking now, even if it runs, what can go wrong?

The fan still has connected it's own capacitor. The motor won't be connected directly to the switch. See photos attached


Or, is there any way I could raise the load on the controller by adding/replacing any components. I got great soldering skills as I do phone microchip leve repairs.

Thanks for your time

 

[Jim_e_Jib]

Thanks James.

I actually connected it and it seems to be working and I'm not saying I did the right thing.

I'm asking now, even if it runs, what can go wrong?

The fan still has connected it's own capacitor. The motor won't be connected directly to the switch. See photos attached


Or, is there any way I could raise the load on the controller by adding/replacing any components. I got great soldering skills as I do phone microchip leve repairs.

Thanks for your time

Components in the controller will likely overheat and fail as more current than they are rated for will flow through them.

You need another 1000W fan to keep everything cool............. ?

 

[Avo Mk8]

There is a 1000W fan controller available:

Smart WiFi RF433 Fan Touch Switch Single Pole Neutral Wire Required 100-240V 10A

WiFi Smart Ceiling Fan Switch APP Remote Timer and Speed Control Compatible with Alexa and Google Home No Hub Required By Moeshouse Main Features: 1.¡ïHands-Free Voice Control: Works with amazon alexa and google home to voice control?your ceiling fan. 2.¡ïControl?From?Anywhere:Turn on or off...

www.moeshouse.com

for when the one you're overloading packs up ?

PS in answer to your question "what can go wrong" the answer is (possibly) it may catch fire, depending on what materials the manufacturer used and what, if any, approvals your 400W switch has.

 

[telectrix]

or you could use the controller to energise a contactor/relay .

 

[Jim_e_Jib]

or you could use the controller to energise a contactor/relay .

The controller will likely have a variable/PWM output to change the speed of the fan as the temperature changes.

The contactor will complain ?

 

[AndreiBuzz]

Thanks a lot guys for clearing my doubts.

Got another question, do you think this thermostat will do the job?
As in description says 5A for the fan and 3A for the valve. Theoretically, it should support 1200W load of the fan.


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HESSWAY-Thermostat de refroidissement et de chauffage, 2P, 4 tuyaux, assujetSmart Life, contrôleur de ventilateur à 3 vitesses, nous-mêmes avec Yandex Alexa Google - AliExpress 6

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a.aliexpress.com

 

[Avo Mk8]

5A fine, but this seems to be for a fan that has low, medium and high connections from the motor.
I thought you were after proportional control of fan speed, for a motor with a two wire connection?

 

[AndreiBuzz]

That's my concern, the wiring. Im fine with 3 static speeds if I cannot find a a proportional one. Can set a range of temperatures for each speed.

Having only two wires, L & N, (+ ground of course), I was thinking, If i split the L (live) in 3 and connect it to the thermostat, will it not act like when I set it on high will medium and low switch off and only high will supply the max voltage?

Or when I set it in medium the H and L from the thermostat to switch off and only the medium to supply the voltage?

As if not, and M L H will be active, there's no point getting it, right?

 

[Avo Mk8]

That's my concern, the wiring. Im fine with 3 static speeds if I cannot find a a proportional one. Can set a range of temperatures for each speed.

Having only two wires, L & N, (+ ground of course), I was thinking, If i split the L (live) in 3 and connect it to the thermostat, will it not act like when I set it on high will medium and low switch off and only high will supply the max voltage?

Or when I set it in medium the H and L from the thermostat to switch off and only the medium to supply the voltage?

As if not, and M L H will be active, there's no point getting it, right?

I thought this controller you are suggesting is designed for fans that have the 3 speeds internally controlled within the fan (eg by different capacitors or different taps on the windings), and three wires coming out from them. The same voltage comes out of this controller, just on a different terminal, so I don't believe your suggestion will work.
Happy to be proved wrong, but that's my opinion on the basis of what I see ?