Ok I will clear this baby up once and for all to reasure any new Profilux owner.
Very high loads associated with ballasts specifically striking loads that can strike at over 40 amps, in time can put gradual wear on a power bars switchable relay contacts. This was in the main due to relays only being rated to the standard house hold supply limited current of 20 amps
In time in North America controller manufacturers NOT just Profilux started to get relay sticking issues. I say again NOT just GHL.
So GHL being the extremely proactive company that it is, to help out existing users with "series 1" power bars brought out the HIGH AMP power bar. this had two great advantages, it took away the high striking load of the these ballasts and put them on a seperate circuit and onto a devise with 200amp rated relays, it also enabled the user to spread the loading better, as any power bar no matter who makes it should not have more than 15 amp current draw on one ring main outlet.
So that provided a cure for people who wanted to use high load devises specifically with high strike rates.
Then GHL went one better, they launched the series 2 power bar, this has no fuses in it and also had high in rush protected relays in every socket, rated at 200amp total current load.
Ok so now you have a power bar that can take huge in rush currents with no chance of sticking relays. But as I have spent many hours stressing on here , this does not take away the fact that the power bar (and this applies to ANY power bar no matter who makes it) should not have more than a 13amp total load applied to it in sum, why 13 amp? - never run an engine on full revs expecting harmony for long! In other words nothing is designed to be run at maximum rating constantly.
So where does that leave the HIGH AMP extension now? Simple terms, it provides the user with a series 1 or series 2 power bar the option to extend the loading of their 6 way or 4 way power bar, this enabling more devises to be attached the main power bar.
Why was this an industry wide issue - Well it is but only in North America, the reason being is that as we all know we are stuck with a very low AC voltage range of 110V which does not carry current (amps) very well. So you see it has nothing to do with GHL but the voltage that is made available, and that is why it is an industry wide issue. It is then up to the manufatcurer to offer a satisfactory solution which GHL did very quickly providing various secure methods of application
But as a final note, I commend GHL so highly for being amazingly proactive in finding a rapid solution to an industry wide issue, and providing the user a variety of different options to make the use of sensitive power bars without restriction or fear of long term damage.
I have heard more than once stories of this old info being touted as a negative towards ProfiLux forgetting to tell the person that profilux was one of the few companies to act on this development and provide the user with an advanced solution to high power devises.
I do hope this now puts this to rest.