Hello, at my place of work we have some shapers and feeders for them, a common issue we have is we do not always remember to turn the feeders off and they get left on over night and are very hot to the touch in the morning. I was wondering if anybody could help me find what I need to get a low voltage signal from the feeders when they are on to allow for a power on light to help reduce the chance of overheating them and starting a fire.
They are 220v, each with there own lines to the circuit breaker. The internal componentS on the feeders themselves are all high voltage with only a variable speed switch.
My first idea was to modify a 220 v auto vacuum switch and take out the signal to its relay, but I have been unable to find a switch that is 220v

 

Hello, at my place of work we have some shapers and feeders for them, a common issue we have is we do not always remember to turn the feeders off and they get left on over night and are very hot to the touch in the morning. I was wondering if anybody could help me find what I need to get a low voltage signal from the feeders when they are on to allow for a power on light to help reduce the chance of overheating them and starting a fire.
They are 220v, each with there own lines to the circuit breaker. The internal componentS on the feeders themselves are all high voltage with only a variable speed switch.
My first idea was to modify a 220 v auto vacuum switch and take out the signal to its relay, but I have been unable to find a switch that is 220v

If they normally operate on a fixed schedule, just have a timer cut the power at the appropriate time. So turn it on and off manually and have a timer be the fail-safe.

 

If they normally operate on a fixed schedule, just have a timer cut the power at the appropriate time. So turn it on and off manually and have a timer be the fail-safe.

That sounds perfect! Would you by chance know what I could research to find something like that? all I could find was timers that turn on and off automatically.

 

It sounds like what you want is called an "ON DELAY TIMER" it starts when it is energized and turns off when it expires. The thing you need is one with a delay time of several hours.

Here is an example from a quick google search. I'm not recommending this particular part, just establishing the existence of such a thing.

https://www.mcmaster.com/on-delay-timers/

and another
https://www.se.com/us/en/product/RE...s..100-h---24..240-v-ac---solid-state-output/

Good Luck

 

Is there a reason you couldn't use 220 volt neon panel indicators?

 

I made pump on indicators for a customer some years ago. They were small current transformers, driving a bridge W04 rectifier, a resistor and high intensity LED.
These worked very well. Just feed a current carrying wire through the current transformer, and that is it.