den_zuk

Thank you a lot, your guess was correct - the middle one was secondary tap. The red cable that going from 220 V plug through the switch was neutral ( for both first and secondary tap). Just right now is under load and working great, thank you again.

Ok boys, i agree that a photo will tell more so i make a fast shoot with phone and show you how it's look like.....on the box ( normal plastic box) there's no label , only one stamp - Made in China. Its not broken, only disassembled by my little son ( in searching for some interesting may be). The box was fully broken so i don't put it on the photo. On the photo in bottom corners are 220 v entry plug ( in left) and 110 V outlet in right . Upper left is normal 3A/250V AC switch and in right its transformer ( cables are :red blue blue ( and between first and after second blue there is an red and black cables that are connected directly to LED)). I'l be grateful if someone can help.

Please can anyone help me assemble this device that my son unfortunately broke (in searching for science ) ....it is some kind of 220 to 110 v converter (190 W), i draw a little picture how the components look like with their actual colors, there's no any labels on transformer or on the box (inside and outside). Maybe it is too easy for someone but for me its almost inhuman to resolve. Thank you.