Author Topic: What is this  (Read 1646 times)

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Offline CicadaTopic starter

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What is this
« on: May 04, 2019, 06:34:56 am »
Hi

Does anybody know what the 2 items are in the pictures attached. It is some sort of switch. Only one of them can open as shown in the pictures. The other unit with the 3.7kw sticker on is sealed.

Does anybody recognize these components i.e. function, equipment in which it is used or brand.

Thanks
 

Offline Gyro

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Re: What is this
« Reply #1 on: May 04, 2019, 10:58:14 am »
If those are pipe connections going in underneath then it looks like a pressure switch with microswitch style snap action contacts. Try blowing through the input ports as see if it actuates.

It might possibly be for those pneumatically operated foot switches. From the condition of the contacts it looks new.
« Last Edit: May 04, 2019, 10:59:46 am by Gyro »
Best Regards, Chris
 

Offline Miti

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Re: What is this
« Reply #2 on: May 04, 2019, 11:42:03 am »
They look like differential pressure switches.
Fear does not stop death, it stops life.
 

Offline CicadaTopic starter

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Re: What is this
« Reply #3 on: May 06, 2019, 07:52:49 pm »
Hi.

Thanks for all the replies.
Ok here is some more photos.

This looks like a heating element inside the body with ceramic  tubes around it. I do not know by what mechanism the contacts are operated. When the contacts are closed current will flow though the heating elements from the one blade terminal to the other. Keep in mind there are O rings sealing the inside of the body where the heating elements sit.

I have no idea what this is. Would be interesting top know.
 

Offline max_torque

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Re: What is this
« Reply #4 on: May 06, 2019, 09:01:42 pm »
Looks like some form of resitive water heating device, possibly with a pair of bi-metalic switches to either avoid the device burning out (if there is too little water flow) or to actually control the water outlet temperature?  These sorts of things are used in showers and forother similar "low temperature" water heating
 

Offline Gyro

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Re: What is this
« Reply #5 on: May 06, 2019, 09:35:16 pm »
Hmm, I'm not sure what kind of heater would allow the water (or fluid) into contact with the 'element', but then, why the seal. There must be something actuating the switch contacts too - which I can't see. Thermal expansion of the coils?
« Last Edit: May 06, 2019, 09:37:52 pm by Gyro »
Best Regards, Chris
 

Offline amyk

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Offline Gyro

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Re: What is this
« Reply #7 on: May 07, 2019, 08:55:41 am »
Wierd!

Ratings between 3.7 and 7.3kW  :o

I still don't understand how they achieve electrical isolation, it would surely trip an RCD (/ human body)?
Best Regards, Chris
 

Offline CicadaTopic starter

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Re: What is this
« Reply #8 on: May 09, 2019, 08:47:14 pm »
 


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