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Parts for high-current application

Discussion in 'General Electronics' started by C. Linus Hicks, Sep 24, 2004.

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  1. I want to build an automatic disconnect for a set of external batteries
    I have on a UPS so I can charge them faster than what the built-in
    charger on the UPS will do. However, I am having trouble finding parts.
    The batteries take an 8mm bolt, and I want to stay consistent with the
    batteries. The existing system is 1/0 and 2/0 cable so we're talking 150
    amps.

    In an enclosure, I want to have two binding posts, screw terminals, or
    whatever they are called. The outside should accept an 8mm bolt for use
    with a ring terminal. I plan on using 1/0 cable inside the box, so
    connection by ring terminals is an option, although the largest bolt
    hole I've seen is 1/2 inch. The bolt terminals should of course be
    insluated from the enclosure. It's a 48 volt system.

    I thought of using shoulder washers and a post or insert threaded for an
    8mm bolt, also threaded on the outside, but haven't found that either.

    Also, I need a 150 amp relay, 12 volts DC would be my preference.

    The places I have seen on the web that almost get to what I am looking
    for are marine/boating sites, with a few PV hits as well, but I have
    still found nothing suitable.

    Can anyone help?

    Thanks,
    Linus
     
  2. Yukio

    Yukio Guest

    150 AMP/12Volt Relay

    sounds like an Automotive Start solenoid to me !

    Yukio YANO
     
  3. Art

    Art Guest

    Simple FORD Start Relay with the Mains controlled by the Start terminal.
    Connect batteries to the Starter Terminal, connect Charging Source to the
    Battery Terminal, connect the Sense circuitry to the Start (Energize)
    Terminal to switch it on when the battery level is requiring charging and
    off when they reach required level. The vented enclosure can house the
    batteries and the cables, the Start Relay can be mounted on the outside of
    the enclosure. Any auto Parts Supplier can show you the various types and
    configurations available. Rest of the circuitry should be academic in
    design.
     
  4. Warren Weber

    Warren Weber Guest

    looking relay made for motorhome battery isolation will work. This can be
    constant on. I have been using such for a long time. Purchased at a NAPA
    automotive store. Warren
     
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