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Surge Protection & Inspection Intervals

PG
If it is considered that an unskilled person could not, safely, replace an SPD surge module;-

Should the recommended interval until the next inspection be shortened if an SPD is part of the Installation (to take into account the limited operating life of the SPD).

If so, are there any guides to the amount of interval reduction?


Regards

PG
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  • 0
    If you want a more accurate  car analogy it is more like the a traction control or diff lock cutting in for a limited number of times - i.e. something that is not needed day to day, and without which the vehicle can be driven normally, but cannot prevent all crashes.


    SPDs that are currently being sold are only effective for a limited range of magnitude of transient- most surge voltages are small and short duration do not start the things conducting at all, and the larger ones that set them conducting permanently are very much one shot events likely to blow the SPD and the still inject surge energy into the following wiring.

    In much the same way that most corners do not need traction control and even on cars with it you might move sideways on black ice.

    Worth fitting when the price point is right, but not generally.

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  • 0
    If you want a more accurate  car analogy it is more like the a traction control or diff lock cutting in for a limited number of times - i.e. something that is not needed day to day, and without which the vehicle can be driven normally, but cannot prevent all crashes.


    SPDs that are currently being sold are only effective for a limited range of magnitude of transient- most surge voltages are small and short duration do not start the things conducting at all, and the larger ones that set them conducting permanently are very much one shot events likely to blow the SPD and the still inject surge energy into the following wiring.

    In much the same way that most corners do not need traction control and even on cars with it you might move sideways on black ice.

    Worth fitting when the price point is right, but not generally.

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