Switch relay if power is too high

Node-RED
,
1

Hello,

Is there a way to have a relay of the Gerbo GX switch if the power becomes too high? I would like to have part of my installation switch off if the power measured by an ET112 becomes too high.

Thank you

2

Probably with node red. Got no way to make a flow for you though i do not use the ETs

3

Ok thank you i look in to that.

4

I think i do someting wronge. below some screen schots cane any one see what is wrong?

the relay shoot switch if the current going higher than 5A

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Schermafbeelding 2026-04-04 1457561261×528 25.3 KB

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Schermafbeelding 2026-04-04 145839682×836 25.7 KB

5

Try changing msg.1 and msg.5 to number 1 and number 5 using the dropdowns that now show msg.

6 
let input = msg.payload;

if (input > 5) {
    msg.payload = 1;
} else {
    msg.payload = 0;
}

return msg;

just add function and copy this code

7

I would add a hysteresis or timer to that logic, unless you want to really exercise the relay..

1 Like
8

Thank you all with the imput you gave it’s works. And a hysteresis is added.