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fatmat
Joined: 12 Apr 2020 Posts: 9
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Link Posted: Sun Apr 12, 2020 4:22 pm Post subject: Relays |
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Hello I have just carried out my first test brew on my new build system. Everything was going great till the boil,my system is a 70 litre stainless kettle with a 6kw element. I used the plans from the electric brewery but had trouble sourcing the 30A/240V DPDT or DPST relay with 110-120V AC coil. I went ahead and used HHC71A-JQX-30F-220VAC from aliexpress (see diagram) and they overheated and melted the bases. When I set my PID's to 100 degrees they melted and tripped the breaker, is this caused by bad parts or something else? I have fitted a cooling fan and a temperature readout to my SSR heat sink but the others overheat, could this be an issue?
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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fatmat
Joined: 12 Apr 2020 Posts: 9
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Link Posted: Sun Apr 12, 2020 5:13 pm Post subject: |
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Thanks for the swift reply Kal, when I said the others overheat I meant the HHC71A-JQX-30F-220VAC relays. So if I was to replace with one of your recommend relays they also won't over heat? I'm a worried I spend a lot on new relays and shipping and I have the same problem.
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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fatmat
Joined: 12 Apr 2020 Posts: 9
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Link Posted: Mon Apr 13, 2020 8:29 am Post subject: Relays |
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Kal could you check this diagram please, is it correct to run one 6kw element? Many thanks
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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fatmat
Joined: 12 Apr 2020 Posts: 9
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Link Posted: Mon Apr 13, 2020 2:28 pm Post subject: Relays |
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Thanks for replying, the bus bars are jumped in my panel sorry.
for the element I used 4mm 3 Core H07RN-F Black Rubber Cable 110V 240V HO7RN-F Indoor Outdoor Cable (1m)
The thicker cable on the diagram is US 10 gauge I used 6mm
The thinner cable on the diagram is US 14 gauge I used 2.5mm
Not shown on diagram all earthed Thanks
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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fatmat
Joined: 12 Apr 2020 Posts: 9
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Link Posted: Mon Apr 13, 2020 2:54 pm Post subject: |
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Sorry what used was
The thicker cable on the diagram I used 6mm
The thinner cable on the diagram I used 2.5mm
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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fatmat
Joined: 12 Apr 2020 Posts: 9
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Link Posted: Mon Apr 13, 2020 3:19 pm Post subject: |
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Could this overkill cause heat issues? I can't find my purchase history to check, I had no problem connecting.
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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fatmat
Joined: 12 Apr 2020 Posts: 9
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Link Posted: Mon Apr 13, 2020 3:42 pm Post subject: Relays |
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Hope this helps
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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fatmat
Joined: 12 Apr 2020 Posts: 9
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Link Posted: Mon Apr 13, 2020 4:14 pm Post subject: |
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Sorry had to go in my control panel, couldn't see at first. 2.5mm and 4mm.
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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fatmat
Joined: 12 Apr 2020 Posts: 9
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Link Posted: Mon Apr 13, 2020 5:09 pm Post subject: |
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Cheers Kal, I appreciate your help and time. I'm going to fit two 40A DP Contactors and run a stress test. Thanks again!
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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