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Solar Tripping M.C.B.

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Evenin' All,


What would cause a domestic solar panel system to trip off its 16 Amp M.C.B. in the consumer unit if any of the below happens please?


a, Turn off and on consumer unit R.C.D.


b, Turn off and on Dedicated solar system isolator switch.


c, Turn off and on  solar system 16 Amp. M.C.B. in consumer unit.


All happened on an overcast drizzly day.


Thanks,


Z.
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  • 0
    If it is inrush it will appear random.

    I once was asked to test the inrush current of a transformer (it was for aircraft use at 400Hz) and the first cycle measured 100 times nominal current if the instant of switching was as the voltage passed zero. If it was switched at voltage max then first cycle was near normal.

    The reason for this is that as the voltage passes zero then, in the steady state, the applied voltage is opposed by a rapidly decaying magnetic field but this is absent at switch on so the only opposition to the first half cycle is the DC resistance of the winding.
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  • 0
    If it is inrush it will appear random.

    I once was asked to test the inrush current of a transformer (it was for aircraft use at 400Hz) and the first cycle measured 100 times nominal current if the instant of switching was as the voltage passed zero. If it was switched at voltage max then first cycle was near normal.

    The reason for this is that as the voltage passes zero then, in the steady state, the applied voltage is opposed by a rapidly decaying magnetic field but this is absent at switch on so the only opposition to the first half cycle is the DC resistance of the winding.
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