UPS Ideas ?
This could be for an RV where there have been posts about TV receivers etc getting knocked out by slow switching 120v power inputs. In this case it is in the stick house. I have jury-rigged somethin...
Forum Discussion
MEXICOWANDERER wrote:
I remember my first Tripp Lite forty years ago....
400 watt square wave.
I connected it to a 90 watt high pressure sodium lamp
SQUEAL. WHISTLE........SCREEEE.......
Hatfield and McCoy. The lamp ballast definitely did not like square wave.
Note: modified sine wave did not exist then. The inverter was heavy and cost $400
Correct you are!
Yes, I HAVE encountered that old "squarewave" UPS in my travels as a Electronic Tech.. Was a field UPS that came back out of the field for the company I was working for at the time with dead batteries.. Was used for the POS (Point of Sale) system for a chain of stores.. Needless to say, we REPLACED it with a bit more modern MSW APC..
I was working as a "Bench Tech" at that time and my job was to setup new systems from scratch and repair all returned equipment for all of the companies customer sites.
I used to repair cash drawers, printers, the Server and workstation PCs and yes, the UPS units back then.. Those older UPS units really were not designed with battery replacement in mind and were a challenge.. Most UPS units simply needed new batteries with only a few unrepairable.. The dirt ugly case UPS units (customer sites often refused equipment with any plastic discolored, dents or scratches could not be returned to the field so they often ended up in my car.
I still have a couple of those older APCs plus a Minuteman laying around but after 30+yrs and multiple battery changes I have been slowly replacing with much newer Tripplites since the newer Tripplites are more stable with a generator than the older technology APC/Minuteman/Tripplite UPS units. Not to mention the older UPS units I have are getting really long in tooth and well past the EOL for reliability.
