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What if additions to the load cause further harmonic distortion – will the AIM Filter be damaged by a greater level of harmonic distortion than originally measured?

April 26, 2017additions aim cause damaged distortion filter greater Harmonic level load

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What if additions to the load cause further harmonic distortion – will the AIM Filter be damaged by a greater level of harmonic distortion than originally measured?

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No, the AIM Filter is current limited and any harmonic current in excess of the AIM Filter rating will simply flow to the source. The AIM Filter will happily run in current limit all the time without any adverse effects, but the excess current flowing to the source may still effect other equipment that might be connected to the network. Dependant upon the size of the excess harmonic load current (say 15%) then an option might be to install an additional parallel AIM Filter to bring the THD down to an acceptable 5%. It will not be necessary to fit additional CT’s if an additional AIM Filter is fitted as there is provision on the Signal Interface Board to use the original CT’s.