Magnet clamp in Fronius Inverter

quique
quique Solar Expert Posts: 259 ✭✭
in PV Installers Forum - NEC, Wiring, Installation #1
I was wondering if anyone in here has installed a fronius 11kw uniphase because the box includes a Permastat Static Dissipative plate and Magnet clamp But they are not mentioned in the manual.

Sorry, the permastat marked plates are for combining strings but what is the magnet for?
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,639 admin
    #2
    Re: Magnet clamp in Fronius Inverter

    Sounds like tools for working on the inverter... the Permastat sounds anti-static material/work surface. Used when you are pulling circuit boards out of the box to be replaced. The magnet--to hold the screws????

    Permastat can also be the shrink wrap used in packaging--To reduce static buildup during packing/unpacking (static electricity is a very common killer/life reduction event for modern electronic devices).

    -Bill "just guessing" B.
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • quique
    quique Solar Expert Posts: 259 ✭✭
    #3
    Re: Magnet clamp in Fronius Inverter

    The static bag thing is a copper plate which does seem to appear in the manual talking about being a piece for combining strings.

    The magnet is a clamp magnet. It came in a bag with a 8" black cable and an 8" red cable and the magnet is encased in a plastic clamp which closes over the set of wires.
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  • gww1
    gww1 Solar Expert Posts: 963 ✭✭
    #4
    Re: Magnet clamp in Fronius Inverter

    are you sure it is a magnet. It sound like something you slip over the wire to count amps or watts.
    gww
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,639 admin
    #5
    Re: Magnet clamp in Fronius Inverter

    Sounds like a copper plate (bus) to connect all the solar array/strings common negative leads together???

    The "magnet"--Is it really a magnet or a Ferro Magnetic Material (basically a material used to make transformer and inductor cores). These are used to "filter out" radio interference from electronic devices (one of many uses). Ferrite Beads:

    Attachment not found.

    You run the wires through the center of the bead, and clamp it shut (if you have room, you can wrap/loop the wires tthrough the clamp to further reduce radio noise.

    -Bill "other guesses" B.
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #6
    Re: Magnet clamp in Fronius Inverter

    There are Current Sensors (current transformers) that can clip around a wire, much like the ferrite chokes, and they can measure the amps in the wire, under the insulation.
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