Construction and erection works at the site of Troyanovo-3 mine are at sub-site 110/20/6kV Substation No.7; Reconstruction of 20kV and 6kV SWGs and earth-fault protection Primary commutation
Substation No.7 rehabilitation includes, as follows:
- Primary commutation of 20kV and 6kV SWGs, earthing system – procurement, erection and commissioning;
- Secondary commutation of 20kV and 6kV SWGs, transformer star point earthing at 20kV and 6kV side - procurement, erection and commissioning;
- Lighting installation and construction works.