Main production groups
21
Complete Large Installations for the Electricity Distribution and Conduction
Complete Installations...
2111.11
Operation of high-voltage networks (transmission network operators)
2111.17
Transformer substations and stations (for public and industrial current supply)
2111.21
Transformer substations of man-sized construction
2111.24
Transformer substations of compact construction
2111.27
Switching stations, control centres and rooms (for public and industrial current supply)
2111.31
Electrical equipment for energy supply plants
2111.34
Network controlling equipment — Supervision equipment for h.v. switchgears see 2211.57 — industrial power control systems see 7911.21
2111.36
Systems for substation automation
2111.38
Substation control systems
2111.42
Flexible three-phase alternating current transmission systems (FACTS)
2111.44
Systems for high-voltage DC transmission (HVDC transmission)
2111.48
Smart Grids (infrastructure for intelligent power supply networks)
2111.51
Power factor correction systems for high-voltage networks
2111.53
Decentralized energy management systems (DEMS)
2111.62
Energy storages for electrical power networks (smart grids)
Cable laying...
2131.17
High-voltage cable laying (mounting)
2131.21
Low-voltage cable laying (mounting)
2131.24
Laying (mounting) of medium-high-voltage cables
2131.27
Laying of submarine cables
2131.28
Laying of offshore cables
2131.31
Laying (mounting) of data transmission cables, telecommunication cables
2131.34
Laying (mounting) of high-frequency cables — Planning and construction of CATV systems see 5211.17
2131.37
Laying (mounting) of optical fiber cables
Erection of electric lines...
2134.14
Planning and erection of contact lines
2134.21
Planning and erection of low-voltage overhead lines
2134.24
Planning and erection of medium-high-voltage overhead lines
2134.27
Planning and erection of high-voltage and extra-high voltage overhead lines
2134.32
Planning and construction of street lighting installations
