UK Electric brewery build

[djcorbetto]

Ive spent the past year collecting parts and piecing them together to make a control panel very similar to the one on the electric brewery website. However I have two areas left to wire up, the ssr's and the mechanical relays. I have purchased and fitted three relays that I believe are correct in terms that they are 240v but I can't figure out how to wire them up, any ideas?View attachment ImageUploadedByHome Brew1419335228.881911.jpgView attachment ImageUploadedByHome Brew1419335252.976389.jpgView attachment ImageUploadedByHome Brew1419335300.705198.jpg

JQX-40F 2Z is the relay I'm using

 

[stlbeer]

I've adjusted your pic just a bit.



This will help the discussion.

The bottom pair of terminals are for the coil. Hot 1 to one side and Hot 2 to the other. When energized the coil closes. I assume that's the operation you expect.

Note that from your second picture that the relay contact is making contact with the top set of terminals. (Hot1-1 to Hot1-2 and Hot2-1 to Hot2-2 in my drawing). These are called Normally Closed (NC) because with no power they are closed. When the coil is energized Hot1-3 is connected to Hot1-2 and Hot2-3 is connected to Hot2-2. Hot1-2 and Hot2-2 are the common terminals and Hot1-3 and Hot2-3 are the Normally Open (NO) contacts.

If you're using this to control the main power to the elements, I would use the 2nd and 3rd pairs of terminals - the common and NO pairs.

This way with the switch to the relay open, no power is flowing to the elements. When the switch to the relay is closed then the coil closes causing contact to the COM and NO pairs completing the circuit.

Please check this yourself first by just wiring up the coil and using a multi-meter to check voltages and continuity.

If you don't know how to do this, by all means have a proper electrician perform this work. I always give 220V systems additional respect in order to prevent an electrical shock situation. Please be careful.

 

[djcorbetto]

Do I need to put power to both of the hot 1 tabs?

 

[stlbeer]

No. The hot 1 column is just for half of the 220v power. The hot2 column is the other half of the power circuit.

 

[djcorbetto]

Sorry, the other half? I'm in the uk with 240v

 

[jwalkermed]

w/ 240V you should have two hot wires. 1 black the other red (in the USA). Each (120V) wire goes on one of the hot leads.

 

[dyqik]

w/ 240V you should have two hot wires. 1 black the other red (in the USA). Each (120V) wire goes on one of the hot leads.

Not in the UK. There's one hot phase (brown) which is 240V away from the neutral (blue). Earth is green/yellow. All domestic equipment is 240V single phase.

Please be careful posting about US wiring standards in response to questions from overseas, you can get things dangerously wrong. In particular, two-phase AC power is not used domestically in Europe.

 

[djcorbetto]

That was my fear. I obviously don't want to blow up myself and some very expensive bit of equipment. Thanks for your help. I will buy a multimeter for peace of mind

 

[stlbeer]

Yeah, I was afraid of that. In that case there's hot and neutral. Wire one side hot and the other side neutral. The relay will switch both sides at the same time.

 

[djcorbetto]

I will have a go with that tomorrow then and see what I can make work. thanks.

 

[BigFloppy]

IN = Common (C) - ALWAYS HOT
OUT = Normally Open (NO) - when coil gets energized, this will be hot
empty = NC = HOT WHEN NO POWER TO COIL

You could switch the Neutral using the opposite side connectors but there's really no need to

Coil Brown and Blue as shown, you would put a switch on the brown wire to manually disable the coil

 

[dyqik]

Yeah, you just need to wire the hot on one side of the relay. Ignore the other side, or use it to switch something else on another circuit if you have a use for it.

BTW, since the UK is on single-phase, the 120V brewery threads and circuits are probably the most useful for you. Just remember to use 240V components and the appropriate wire colours.

 

[djcorbetto]

so before I go ahead and wire this up, if I go by the last photo that big floppy did for me, I'm going to connect my live wire to the top tab on the left and side and the neutral on the other top tab on the right. i do have a switch, I have a key switch

 

[BigFloppy]

It might be the Yorkshireman in me explaining it wrong but I'm sure I said the top tabs are the ones you don't connect anything to...
Connect your Line and Neutral to the bottom tabs (the coil)

 

[djcorbetto]

Sorry I'm sure you wrote it ok, I just read it wrong

 

[djcorbetto]

does anyone know the best method of connecting cable up these? or is soldering the only option?

 

[djcorbetto]

View attachment ImageUploadedByHome Brew1420997674.574047.jpg