Manual transfer switch,240v

HTF said:
No it doesn't. The switch in the link only has a pair of contacts. Both off on 0 or one or the other on the 1-2 position. It needs 2 levels of contacts to cut both lines.
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please check your information before posting ...

HTF said:
Until I retire, electrical engineering is still my day job ;)
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You should know better than ;)

Pictures of the switch ....

Contacts 2-4

61cHeiy5UPL._AC_SL1500_.jpg


Contacts 1-3
61d0pbT2gGL._AC_SL1500_.jpg
 
wildebus said:
please check your information before posting ...


You should know better than ;)

Pictures of the switch ....

Contacts 2-4

61cHeiy5UPL._AC_SL1500_.jpg


Contacts 1-3
61d0pbT2gGL._AC_SL1500_.jpg
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First contact is between 1 and 2. The second, 3 and 4. Usually there is a little hidden bar connecting 2 and 4 or 1 and 3 to make the common connection. It can be seen just under the square washer on the screws
 
wildebus said:
Any why do you need 8 terminals?

You need 4 terminals for a 2 input, 1 output switch - a piar for Live and a pair for Neutral. The first one is not what I would buy, BUT it would work.
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There are 2 pairs with a common connection on one side which makes it 6 connections. 2 inputs grid, 2 inputs inverter and 2 outputs.
 
HTF said:
There are 2 pairs with a common connection on one side which makes it 6 connections. 2 inputs grid, 2 inputs inverter and 2 outputs.
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read my post (I corrected my post as I forgot to add the output lines before your reply).
 
This is what it looks inside that switch on each level except for the central cam design

20251105_144210.jpg
 
The one I linked is correct because since it's made as a change over from factory, the pair of screw connections on the picture right have an internal metal link making it effectively only 3 connections on each level. That is just how it is. Don't believe, your problem. Maybe someone else who understands will step in and confirm.
 
Thanks guys I think I will go down auto switching, now to find auto switch ,, there's so many, any suggestions very much welcomed.
 
Mr and Mrs Tupcox said:
Just looking at this one .easier to mount I think. Would it work,?https://ebay.us/m/X92Kso View attachment 77116
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It will but since it's automatic, might be more complicated to adapt. The one in the previous post is just 2 inputs and one output with manual switching and can be installed on the breaker panel next to the other circuit breakers.

You must take care to connect the on-board battery charger only to the mains wiring otherwise the inverter will feed it and try to charge the battery when it's supplying the 230v which will lead to a dead battery
 
HTF said:
It will but since it's automatic, might be more complicated to adapt. The one in the previous post is just 2 inputs and one output with manual switching and can be installed on the breaker panel next to the other circuit breakers.

You must take care to connect the on-board battery charger only to the mains wiring otherwise the inverter will feed it and try to charge the battery when it's supplying the 230v which will lead to a dead battery
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Thanks
 
Chasn said:
I used a relay rather than a switch. Power changes over automatically from inverter to EHU as soon as the external cable is connected and reverts to inverter on disconnection, so easy. Here is ia typical relay (double pole).

WANGCL 2PC AC 220V DPDT Relay, 2NO+2NC, 8Pin with Socket Base: Amazon.co.uk: Business, Industry & Science

WANGCL 2PC AC 220V DPDT Relay, 2NO+2NC, 8Pin with Socket Base: Amazon.co.uk: Business, Industry & Science
www.amazon.co.uk
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That's a low current signal relay. Does the job but is not the best choice. I use a motor contactor with 2 open and 2 closed power contacts like this one.

LC1D AC LC1D098 LC1D128 LC1D188 LC1D258 Contactor 4 poles Electric Power Contactor AC24V AC36V AC48V AC110V AC220V AC380V(LC1D258,48V) : Amazon.co.uk: Business, Industry & Science

LC1D AC LC1D098 LC1D128 LC1D188 LC1D258 Contactor 4 poles Electric Power Contactor AC24V AC36V AC48V AC110V AC220V AC380V(LC1D258,48V) : Amazon.co.uk: Business, Industry & Science
amzn.eu
 
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