This was happening with analog transformers where a high voltage spike (mostly caused by induction) , was turning a commonmstodola wrote:Transient suppression (to explain for others) is to stop very very high voltage spikes that are created when brown outs and black outs occur
50/60 Hz transformer to behave like a Tesla coil , producing high voltage and burn secondary regulation circuitity !
This won't happen in a SMPS , since in fact rectifies any input current with high value capacitors that can completely suppress any spike
and eliminate it , but also in CE designs (as in mine) , a suppression zener diode of 1000A (for μS) is used to protect primary stage
switching from voltages over 650 V where already SMPS Fets works fine !
- What a simple ST-BY UPS will do in case of grid power overloltage / spikes ? Nothing at all ... 'cause voltage is present !
- What a simple standalone overvoltage protection (without UPS) will do in the same case ? This will shut down abruptly grid power supply ,
causing grid power blackout by itself and maybe data loss in your Pa4X if you were under saving procedure !
So I repeat once more , that Switching Mode Power Supplies (SMPS) like the one that your Pa4X has , can handle every weird behavior of grid
power , can work in any voltage between 90 - 450 volt safely and you need no futher protection ( except thunder discharge that will burn
everything in your home including any internal protection and maybe You too
) !Therefore the only thing that a SMPS can't do is to supply your device over 0.2-0.3 seconds in case of grid blackout where a UPS is needed if
you execute important functions like Update/Save or even Performing !
Now how SMPS behaves under Grid power blackout ? It's exactly as you pull the plug cord from your grid socket or turn off rear power switch
(as in pa3X) ... so simple , so safe !
I think that all of you must be aware of this reality , don't be panic and waste your bucks for non existing threats that some other manufacturers advertise !
Hope this helps
