Transformator kioskowy, Transformer column in Praga district, Warsaw, Poland.

Transformator kioskowy is a cylindrical steel structure situated at the corner of 11 Listopada and Konopacka Streets in Praga. The column houses electrical distribution equipment with side openings that serve the neighborhood's power supply network.

The structure dates to Warsaw's early electrification period around 1903, when the Municipal Power Plant in Powiśle began operations. It represents the beginning of electrical infrastructure development across residential neighborhoods.

The cylindrical steel casing is often mistaken for an advertising column, a detail worth noting when spotting one. The kiosks belong to Warsaw's 5 kV network, which began with eight stations and 5 km of cable in 1904 and grew to 1,800 stations and 600 km of cable before the network closed in 1977.

The kiosk stands at a street corner near public transportation stops and is easily accessible for observation. Visitors can view the structure from the outside as it functions as active neighborhood infrastructure.

This particular example belonged to a network operating at 5 kilovolt until 1977. It remains one of the few surviving structures from Warsaw's original electrical system.