Symbol 6409 from IEC 60417 - Title/Meaning: Resistive VDIS Function/description: To indicate that the structure of the coupling system is resistive.
Additional information: 
See also IEC 60417-6408.
For technical detail including the location of the graphical symbol, see IEC 62271-213.
Own work using: iso.org/obp/graphics/grs/1fbcf558-d643-4065-ac4d-013a7704bb25 200.png
Vectorization:  Mrmw