New SSR controller

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New SSR controller

Postby caspian » Sun Nov 19, 2017 3:32 pm

Hi all, some pics of my second controller, SSR based this time.

Cast alloy box from RS Online, quite a bit of work filing all of the holes for the panel hardware.
Heavy duty 2W metal wound resistor from RS.
Fotek 40A SSR, probably a chinesium clone, but works OK and doesn't get hot, even without the fan blast. SSR to heatsink and heatsink to box is all bedded with temperature transfer goop.
eBay special railmount Hall effect wattmeter.
Big 240V fan, shifts heaps of air.
eBay quarter turn switch, another chinesium special, I think it's "rated" for 600V/10A so hopefully it can handle 1800W peak and 1100W run without issues.
Everything common-rail earthed.

Next time I will reverse the position of the power switch and the control pot, the pot is a lot easier to wire and get neat.

Click for more biggerer pics.



Posts: 17
Joined: Tue Nov 24, 2015 9:07 pm
equipment: T500 boiler and copper pot still head

Re: New SSR controller

Postby bluc » Sun Nov 19, 2017 3:44 pm

Nice work :handgestures-thumbupleft:
Posts: 5979
Joined: Tue Apr 14, 2015 5:47 pm
Location: sunshine coast
equipment: 2" pot with 2" shotty 400mm long 5x 1/2" on a t500 boiler.
50l keg boiler 4" still mount 4" sight glass 1" drain..
4 plate 4" bubbler, 600mm packed section

Re: New SSR controller

Postby ThePaterPiper » Sun Nov 19, 2017 3:59 pm

:text-+1: Great job. Very neat.
Posts: 335
Joined: Sat May 27, 2017 5:56 pm
Location: Newcastle
equipment: 50L Pot Still with two inch column into a 700mm Liebig. Also have a 19l thumper interchangeable into the setup.

Re: New SSR controller

Postby A&O » Sun Nov 19, 2017 4:32 pm

Very very nice, good work.

Silly electrically challenged question, why use a metal casing? Is it function or looks?
Posts: 266
Joined: Tue Aug 15, 2017 6:01 pm
Location: Albany, WA
equipment: 4" Goddess Blockhead - 5 Plate + 500mm Packed section
50L Converted upside down keg

Re: New SSR controller

Postby caspian » Sun Nov 19, 2017 9:47 pm

mostly functional, because I wanted to try it. the material cuts pretty easily with hand tools and some patience.

it does automatically ground the pot body but you could do the same thing by soldering a wire from the back of the pot casing to a common ground if using a non-conductive housing.
Posts: 17
Joined: Tue Nov 24, 2015 9:07 pm
equipment: T500 boiler and copper pot still head

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