Pt 1: 2000 Volt UPS Battery Short Circuit 600+ Amps!

[@MrTheog1989]

Good honest fun right there!

[@sbreheny]

Regarding battery storage - the state of charge also matters. In other words, a battery which is kept at 24C can have a 5 or more year service life if you charge it periodically to keep it close to 100% state of charge. Higher temperature increases self discharge rate and it also increases the rate at which unintended degradation reactions happen - but some of those are reversible if the battery is recharged.

[@abetownneufeld6057]

You’re the man!! I use these batteries on wind turbines all the time and always wanted to do this 😂

[@sbreheny]

This is essentially an exploding bridgewire, although the internal resistance and inductance is too high to see the full shock wave behavior of one (when used as explosives detonators, they are driven by a big capacitor with very low ESR and very short leads)

[@LawpickingLocksmith]

Absolutely love this! I was always wondering why some railway systems like Italy use 3kV and can cruise passenger trains with like 130km/h. But most new trains go 25kv 50 or 60Hz. European central powers are 15kV 16.7Hz because of the skin effect. What about new HV DC lines do they go over 200kV ?

[@Sixta16]

European center power is certainly not 16.7Hz, it is 50Hz. That 1/3rd of 50Hz, 16.6667Hz, that is some old still carried over railway nonsense hopefully on phase-out already, as it requires 3x times as heavy transformers to be carried within the locomotives. Afaik, the 16.66667Hz system was used due to only pisspoor performing materials were available at the age of the creation of such supply voltage systems at early 20th century. Skin effect has nothing to do with this, but eddy current loss and hysteresis loss in early traction motors definitely yes.

[@LawpickingLocksmith]

@@Sixta16 Switzerland, Germany, Belgium had recently changed form 16 2/3 to 16.7Hz. Italy is going from 3kV DC to 25kV 50Hz.