Tag
#ups
2 topics across all disciplines.
Emergency power and UPS — what stays alive when the supply does not
The difference between essential and emergency loads, why a UPS and a generator solve different halves of the same problem, what a battery autonomy figure really promises, and why the generator that has never run under load is not a backup.
Battery and DC system integrity — the supply that only matters when everything else has gone
Why a battery with the right float voltage can still be dead, impedance trending against timed discharge testing, the unearthed DC system and the first earth fault, duty cycles that grew, and the healthy UPS with a bypass nobody ever proved.