Container transformer station STKT is designed for operation in power grids with the upper voltage of 20 kV and is used to supply power receivers with 0.4 kV voltage, transferred from the station via cable lines.

The station casing is made entirely of alu-zinc sheet pained with primer undercoat in the form of a single transport element, comprising a uniform spatial system. In addition, the station is equipped with steel skids, allowing it to be moved.

The transformer compartment allows to insert oil distribution transformer of up to 630 kVA, set on the rails. Under the transformer, there is a tight oil sump with a capacity of up to 100% of transformer oil.

In standard version, the transformer compartment allows to insert transformer of up to 630 kVA.
The switchgear compartment allows to insert both air- and SF6-insulated MV switchgear with up to 4 bays, as well as LV switchgears with fuse disconnectors in output bays – up to 14 bays. Additionally, at the client request, LV switchgear can be equipped with a measuring unit and street lighting unit (after reducing the number of outflow bays to 12).

The used MV switchgears:

• air insulation: PEGASO, RMt-20 and RM20
• SF6 insulation: CGM COSMOS (ORMAZABAL), RM6 (manufactured by SCHNEIDER), 8DJ20 (manufactured by SIEMENS), Safe Plus, Safe Ring (ABB)

The used LV switchgears:

• RT, RTL, RTE, RTEa transformer stations

• The station was tested by the Institute of Power Engineering in Warsaw, Office in Gdańsk for compliance with the following standards: PN-EN 61330:2001, PN-EN 60298:2000, PN-EN 60439-1:2003 and has certificate no. 0101/LOG/95.