12/24 volt sys Rev 1

Discussion in 'OnBoard Electronics & Controls' started by Nick Proctor, Apr 3, 2022.

  1. Nick Proctor
    Joined: Apr 2022
    Posts: 3
    Likes: 0, Points: 1
    Location: Orange Ct.

    Nick Proctor New Member

    Normally bats connected in parallel Solid lines 12v system
    For 24v system bashed lines
    12v system. Batt in parallel. s2 closed s1 open. Solid lines. Charging to 12v system
    12v from batt 1+ and batt 2 - as recommended in other sites. Boat power
    24v system s2 open s1 closed batts in series Doted lines
    24v from bat 1 - and batt 2 + to power windlass
    System ret to 12v for normal operation
    s1 and s2 manually operated for simplicity 86C6B37F-A94A-48D3-B7F6-D4FE7D757D8D.jpeg
    Appreciate all previous comments !!
    Comments on above ??
    Or alt design using (2) 12v batteries
    Thanks
    Nick
     
  2. fallguy
    Joined: Dec 2016
    Posts: 5,884
    Likes: 1,162, Points: 123, Legacy Rep: 10
    Location: usa

    fallguy Senior Member

    No

    S1 open
    S2 closed

    Available voltage is 12v, parallel connection

    Windlass will behave uncertainly, probably draw high current. Don't pretend you won't turn it on by accident.

    Rest of system behave normally.

    S1 closed
    S2 open

    B2 has a dead short, fire will result

    To do what you want needs more than a couple switches.

    This device uses sensing relays to determine what to do, so to speak.

    https://www.yandina.com/acrobats/TrollBridge24.pdf
     
    Last edited: Apr 4, 2022
  3. fallguy
    Joined: Dec 2016
    Posts: 5,884
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    Location: usa

    fallguy Senior Member

    Here is what happens when you throw S1 and it WILL turn red, fast

    FBA54F1F-0306-48D7-8D6F-700EBBB0CB25.jpeg
     
  4. Nick Proctor
    Joined: Apr 2022
    Posts: 3
    Likes: 0, Points: 1
    Location: Orange Ct.

    Nick Proctor New Member

    The switching mechanism reminds me of the series parallel switch that was in the old Mack trucks.
    If sw3 were added bet a1+ and b1+ would this solve the problem??
    Thanks for the troll ridge det !!
    And for the reply
    Nick
     

  5. fallguy
    Joined: Dec 2016
    Posts: 5,884
    Likes: 1,162, Points: 123, Legacy Rep: 10
    Location: usa

    fallguy Senior Member

    Well, yes, but...

    A manual switch would never be allowed; the only way would be for the switches to automatically exclude the possibility of shorting, so both could never be on...

    I don't know all the electronics well enough to go beyond basics. I can tell you that your general direction is not good.

    Varying voltages is best done by keeping power supplies discrete.
     
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