= voltage sag

olemus
toitepinge järsk langus madalamale 90% nimipingest,
kusjuures pinge taastub 10 ms kuni 10 min jooksul
= a short duration reduction in root mean square voltage

ülevaateid
https://www.riello-ups.com/questions/48-what-s-the-difference-between-a-voltage-sag-and-a-surge
https://en.wikipedia.org/wiki/Voltage_sag
https://core.ac.uk/download/pdf/295581021.pdf

vt ka
- alapinge
- pingemuhk