Can any relays handle 32A?

Discussion in 'C-Bus Wired Hardware' started by DaleS, Feb 3, 2020.

  1. DaleS

    DaleS

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    Wondering if c-bus can be integrated into electric car charging.

    Fast charging requires 32A capable switching - are there any c-bus relays that can handle that?
     
    DaleS, Feb 3, 2020
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  2. DaleS

    bmerrick

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    Hi Dale,

    For 32A or 3 phase switching, you can run a contactor with a 240VAC coil downstream from a standard C-Bus RVF (eg L5512RVF) relay to switch much higher loads. The contactor supplies the switched primary load whilst the C-Bus relay just switches the contactor on and off supplying the contactor coil. This configuration is often used for underfloor heating systems for example.

    Here is a Clipsal 3 phase one I just googled but there may be a single phase unit at lower cost.

    Good Luck

    Brad

    :eek::cool::cool::cool::cool::cool::cool:
     
    bmerrick, Feb 3, 2020
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  3. DaleS

    chromus

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    *Edit* Bmerrick beat me with similar solution.

    You could use an ELV relay to control a separate (possibly custom built) relay module circuit that can handle the current.

    FWIW with the current draw that high I would look at a 50amp capable relay to give it longevity.
     
    chromus, Feb 3, 2020
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  4. DaleS

    DaleS

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    Thanks for the info guys, much appreciated!
     
    DaleS, Feb 3, 2020
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