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    priyantha's Avatar
    priyantha Posts: 1, Reputation: 1
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    #1

    Oct 9, 2010, 07:20 PM
    How does 4 pole RCD operates in a unbalanced three phase system without neutral
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Oct 10, 2010, 04:33 AM
    The sensing coil will still monitor for any earth leakage and trip if any is seen over tolerance.

    Need to check with the manufacturer or your RCD, as many need either a neutral or earth ground on the 4th pole for the test button to operate properly.
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