ZSSK Cargo 363 091Zeleznicna Stanica Petrzalka Zeleznicna Stanica..

Hmm .. Signs on the contact network. "Lift the pantograph" and "lower the pantograph" - this is understandable. What does this sign mean?
https://pp.userapi.com/c845522/v845522016/39535/z2Ng_bm3nxM.jpg

In this station you have 2 electrics lines. In Slovakia ( Bratislava) you have 25kV 50Hz but here you have the Austrian Electric 15kV 16,7Hz. When you ride from the right track to the left track you have the slovakian 25kV 50Hz electric. On the right track you have 15Kv 50Hz . But yet i have not idea why he has the second sign the for ''end of'' AC
I hope i can you help

@trainspotter
Thank you! I understood.
It turns out it is a kind of station docking various electrical voltages. I used to think that in Slovakia there is no alternating current on the railway. I usually saw only DC locomotives.