content: At first I thought it was an Italian 3-prong (Type L) plug (with ground in the middle) but that one has all the prongs in a single plane. (16A & 10A respectively): https://files.catbox.moe/tid13y.jpg https://files.catbox.moe/100ld5.jpg Apparently it's a 1998 Brazilian standard with the middle pin (ground) slightly offset: https://files.catbox.moe/q197c5.jpg https://en.wikipedia.org/wiki/AC_power_plugs_and_sockets#Brazilian_standard_NBR_14136_(Type_N) The interesting snippet is:  "Brazil, which had been using mostly Europlugs, and NEMA 1–15 and NEMA 5–15 standards, adopted a (non-compliant) variant of IEC 60906-1 as the national standard in 1998 under specification NBR 14136 (revised in 2002).[16] These are used for both 220-volt and 127-volt regions of the country, despite the IEC 60906-2 recommendation that NEMA 5-15 be used for 120 V connections."  My bet is that her mistake was to connect a 127V appliance into a 220V socket after 'converting' a NBR 14136 plug into a "Europlug". This explains the smoke and the rest. Stupid regulations (127V and 220V on the same plug) get stupid results.