Chargers My Charger :)
- Thread starter Graham Lawrie
- Start date
Graham Lawrie
Well-Known Member
Just got to wire it, if I can figure out how to with help on here
Graham Lawrie
Well-Known Member
I have read Gabas thread , watched your video Tony, as well as reading Deano1,s thread.
Slowly getting to grips with the wiring, but not 100% I have the same set up as Deano, but not sure on the switch wiring?
I have not seen the diagrams everyone mentions?
I basically need an idiots diagram, eg 12v side switch wires.....to the 24v switch side. Is it earth to earth , positive to positive, where does the jumper go etc.
thanks
Graham
Tony
Staff member
Switch? Are you wanting to put a switch on the output only of the PSU's, or are you wanting to put a switch on the AC side of it as well? I guess in either manner, I can explain.
On the AC side, I'm guessing you are running 240vAC over there, you will put the switch, which is capable of handling 770w of power at your voltage, on the hot wire. There should be 3, hot, common, and ground. You will want to do the hot with teh switch. This will turn the PSU's on and off.
On the DC side, you are going to need a switch that is capable of 40a at 24 volts DC. You will put this switch on the ground side of the wire. DC current is Direct current meaning it only travels in one direction.
If you are going to run, as I am, both 12vDC and 24vDC, then you will need a switch on each of the sides. Both on teh ground though. Just remember, the lower the voltage, the higher the amperage given the same wattage.
I hope this makes sense, I have a lot going on here right now and my head is a little scrambled.
On the AC side, I'm guessing you are running 240vAC over there, you will put the switch, which is capable of handling 770w of power at your voltage, on the hot wire. There should be 3, hot, common, and ground. You will want to do the hot with teh switch. This will turn the PSU's on and off.
On the DC side, you are going to need a switch that is capable of 40a at 24 volts DC. You will put this switch on the ground side of the wire. DC current is Direct current meaning it only travels in one direction.
If you are going to run, as I am, both 12vDC and 24vDC, then you will need a switch on each of the sides. Both on teh ground though. Just remember, the lower the voltage, the higher the amperage given the same wattage.
I hope this makes sense, I have a lot going on here right now and my head is a little scrambled.
Graham Lawrie
Well-Known Member
That makes sense Tony I want to have the two switches the same as Deano for 12v and 24v.
I want to have the two switches the same as Deano for 12v and 24v.
Graham Lawrie
Well-Known Member
Love the terminology USA= HOT COMMON GROUND. UK= LIVE NEUTRAL EARTH. LOL
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USA= HOT COMMON GROUND. UK= LIVE NEUTRAL EARTH. LOL- - - Updated - - -
Tony could you do a sketch of what you mean by the switches both on the ground please
Stambo
Well-Known Member
Has anyone tried using a couple of crossover relays instead of putting the high current through switches?
Very simple to do, all you need is a low current on off switch and 2 crossover relays.
Relay rating would depend on how much current you expect to put through them but I imagine 50 amp relays would suffice.
I could draw up a simple diagram if anyone wants.
Using this method, once set up is virtually fool proof.
You turn AC side on and off to power up the system.
You use one small toggle switch to select 12 or 24 volts.
Very simple to do, all you need is a low current on off switch and 2 crossover relays.
Relay rating would depend on how much current you expect to put through them but I imagine 50 amp relays would suffice.
I could draw up a simple diagram if anyone wants.
Using this method, once set up is virtually fool proof.
You turn AC side on and off to power up the system.
You use one small toggle switch to select 12 or 24 volts.
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Stambo
Well-Known Member
I was bored and thought someone might be interested so I drew up a diagram.
It works like this.
SWITCH OFF
No relays are energised.
Relay 1 connects the negative from psu 1 to the negative output through the normally closed contact.
Relay 2 connects the positive from psu 2 to the positive output through the normally closed contact.
This gives you 12 volts with both psu in parallel.
SWITCH ON
Both relays are energised.
Relay 1 disconnects the negative from psu 1 from the negative output, and connects it to the positive of psu 2.
Relay 2 disconnects the positive from psu 2 from the positive output, and connects it to the negative of psu 1.
This gives you 24 volts with both psu in series.
The relays are 12v and are energised only from psu 1.
This method uses both relays in parallel on 24 volts thus sharing the current load.
On 12v each relay runs current from only one psu, again sharing the current load.
All wires connect only at the dots.
Any questions feel free to ask.
Relays are such wonderful toys, you can do so much with them.
If anyone wants me to scan and upload my diagram in PDF format let me know and I will take it to work Monday and do it.
It works like this.
SWITCH OFF
No relays are energised.
Relay 1 connects the negative from psu 1 to the negative output through the normally closed contact.
Relay 2 connects the positive from psu 2 to the positive output through the normally closed contact.
This gives you 12 volts with both psu in parallel.
SWITCH ON
Both relays are energised.
Relay 1 disconnects the negative from psu 1 from the negative output, and connects it to the positive of psu 2.
Relay 2 disconnects the positive from psu 2 from the positive output, and connects it to the negative of psu 1.
This gives you 24 volts with both psu in series.
The relays are 12v and are energised only from psu 1.
This method uses both relays in parallel on 24 volts thus sharing the current load.
On 12v each relay runs current from only one psu, again sharing the current load.
All wires connect only at the dots.
Any questions feel free to ask.
Relays are such wonderful toys, you can do so much with them.
If anyone wants me to scan and upload my diagram in PDF format let me know and I will take it to work Monday and do it.
Slobberdog
Well-Known Member
My switches go through the pin block in the centre so it switches the psu on/off not inline on the output wires,
Slobberdog
Well-Known Member
Here's a few deconstructed pics inside my box,
Behind my pole connectors.
Here's the outputs from the psu's
And here with a switch added,
Hope they help you a bit more Graham, I went for simple switches to avoid the confusion of having to wire them. Cos I'm not that great with electricary.
Behind my pole connectors.
Here's the outputs from the psu's
And here with a switch added,
Hope they help you a bit more Graham, I went for simple switches to avoid the confusion of having to wire them. Cos I'm not that great with electricary.
Stambo
Well-Known Member
So you only use 1 psu for 12v and 2 for 24v?
Slobberdog
Well-Known Member
Yep, Stambo, I pretty much only use one side at the moment but have plenty more power to go for 6s setups, that is why I put switches on the psu's I can isolate the second one when I don't need it on.
Graham Lawrie
Well-Known Member
Kind of??
What my question now is, do I have to join the pole connectors ? like in your first picture.
I think what I will do is try a drawing and post it up.
I think I am at the stage I am over complicating it for myself
Slobberdog
Well-Known Member
I done it that way because I only put one connector on the terminals, you have both options avail to yourself
Graham Lawrie
Well-Known Member
Both options?
I will take some pics and post up
You will see mine is the same at the PSU out as yours, just mine are on their side due to space.
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I have still to fit the 12v connectors on the left hand side