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LED inrush current and generator set

Julien Leblanc
Hello,


I'm currently working on a sport field application where i need to power some LED reflectors (30 kW total).

I will also use a generator set, in case the network fails.


The inrush current of the reflectors is 3 times higher than their rated current, but the duration is only 0.2ms.


Could anybody tell me if i should take into account the inrush current when I choose the generator set power (that is, to oversize the generator)?

Or i should ignore the inrush current and set the power of the generator a bit higher than the total power of the reflectors?

I'm not talking about the circuit breakers of generator's outputs. Let's say one can choose them so that they don't trip.

If those breakers don't trip, is it possible that anything else happen to the generator set, because of the inrush current?


I've been searching through the specifications of many generator sets, but i cannot find any data on this specific problem (short overload).






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    mapj1:

    If you really cannot avoid dropping all the load on at once, then the genset will need to be over-size by 2 or 3 to reflect that, though in many ways that is just wasteful. If you can drop down to a minimal emergency light level when the ATS kicks over and then bring the bigger load on just a little later it will be better.

    Have you got a tame genset supplier ?- the folk who make them are normally more than happy to advise this sort of thing, but as it depends on the build, the 'generic' information covering different internal designs is quite variable.


    Yes, all genset suppliers i have contacted told me the same thing: choose a capacity which covers the added inrush currents of all LEDs.


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  • 0
    mapj1:

    If you really cannot avoid dropping all the load on at once, then the genset will need to be over-size by 2 or 3 to reflect that, though in many ways that is just wasteful. If you can drop down to a minimal emergency light level when the ATS kicks over and then bring the bigger load on just a little later it will be better.

    Have you got a tame genset supplier ?- the folk who make them are normally more than happy to advise this sort of thing, but as it depends on the build, the 'generic' information covering different internal designs is quite variable.


    Yes, all genset suppliers i have contacted told me the same thing: choose a capacity which covers the added inrush currents of all LEDs.


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