Yes, I agree that you could set the overload to less than 100%. zai_jnr could measure the normal current over some time with the conveyor transporting the maximum amount of material, and set the overload to 110% of that (but not higher than FLA of course). The overload would then become a "poor mans mechanical problems detector". The overload will act faster. If the normal operating current is substantially less than FLA you will get something like 1-2 seconds tripping time in stead of 5-10 seconds.
edit: Leitmotif's suggestion about a mechanical safety is best if you can possibly manage that.
edit: Leitmotif's suggestion about a mechanical safety is best if you can possibly manage that.
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