Elektor Formant Modular

hi,

I wondered if any of our German speaking friend could tell me what a 
couple of compnents are from tne mss2000 book.

Netztrafo 2 x 18v/s(schutzisoliert)
schalter
haltewinkle

Please could anyone tell me what these words mean or send me a link 
to a picture.

Thanks
Kris Bishop