Steel portals for 35-500kV outdoor switchgear

Unified steel structures for outdoor switchgear (OSG) of voltage 35-330 kV are designed for the suspension of bus-bar and installed in open areas of high-voltage stations.

Portals bus are made free-standing in a U-shaped structure with clamped on the foundation pillars and swivel racks with crossbars.

Girders are made with a lattice-type connection on the lap welding or a compound of the elements on the bolts.

For the manufacture of portals steel of C245 or C345 grades is mainly used.