Quote:
Originally Posted by Hdlaut
The data sheet says "Non-linear load, crest factor 3:1"
Does this apply, and if so how?
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I don't know what they mean by that, and whether it would be applied to the peak value (3500 o the old model, 5500 on the new) or the continuous power rating. 2000 on the, 5500 on the new models).
If it is applied as a maximum in comparison to the continuous rating, you'd have 6000 watts after applying the the factor 300% times 2000 watts is insufficient for most "1000 watt" microwave ovens, with reactance of about 7x (700%). I suspect that is is their method in providing in 300% "crest factor". 900 watts times the 7x typical reactance is only 6300 watts, and the 6000 watt "crest rating" would be short by only 5%.
These have been good questions on a complex subject. My own inverter (3000/6000) is rated for is rated for slightly more peak power than even the new Victron units, it has run a 900w microwave pretty hard (for two years, multiple trips totalling multiple weeks) with no damage so far. I know that it can exceed it's 3000w continuous rating for many minutes, but I never created a configuration to asses it's "peak" rating.
Most "peak ratings" are defined for 1/10 second as a continuous high AC power load. That kind of power demand is quite a bit different than reactance: Reactance occurs in conflict with each AC cycle (USA is 60 hz per second), a much shorter period in which a decent inverter design can handle a bit more abuse. But it all depends on the capacitor and transistor characteristics of the Inverter design - push them too hard, and they die young.