Substations 110/380 kV
Turnkey in the EPC(M) model: planning, procurement, construction and commissioning – in record time.
01
EPC(M) Scope of Services
Planning. Procurement. Construction.
Planning
Complete engineering in line with our grid connection engineering services – from concept to detailed design.
Procurement
Long-term supply agreements with renowned manufacturers ensure predictable delivery times.
8–12 months
Main transformer
5–8 months
HV/MV switchgear
Construction
Proven, fast construction process – civil and electrical works included.
2–3 months
110 kV civil works
Construction times by work package
| Work package | 110 kV | 380 kV |
|---|---|---|
| Civil works | 2–3 months | 3–4 months |
| Electrical works incl. installation, commissioning & grid integration | 2–3 months | 3–4 months |
02
Capacity Classes
Power classes and typical configurations
| 40–80 MVA | 63–120 MVA | >100 MVA | |
|---|---|---|---|
| Main transformer | 1 transformer | 1 transformer, double split | Multiple transformers |
| HV bays | AIS / HGIS / GIS | AIS / HGIS / GIS | AIS / HGIS / GIS |
| MV side | MV GIS, single busbar | MV GIS, sectionalised busbar | MV GIS, multi-sectionalised busbar |
| Reactive power compensation | Capacitor Bank / SVG | Capacitor Bank / SVG | Capacitor Bank / SVG |
AIS vs. GIS – technology comparison
AIS — Air-Insulated Switchgear
- Proven and widely used technology
- Easy visual inspection
- Flexible future expansion
- Requires a larger site footprint
- Suitable where sufficient land is available
GIS — Gas-Insulated Switchgear
- Highly compact configuration
- Enclosed high-voltage equipment
- Suitable for restricted or demanding sites
- Reduced exposure to external environmental conditions
- Project-specific lifecycle assessment required
03
Alternative Construction Method
Prefabricated Substation
As an alternative to conventional construction: fully prefabricated stations.
Prefabricated and Modular Substation Solutions
- Prefabricated GIS modules
- Modular medium-voltage buildings
- Prefabricated protection and control rooms
- Factory-installed auxiliary systems
- Factory testing before delivery
- Reduced construction interfaces on site
- Modular future expansion
Prefabricated modular substation
Related: The grid connection for your large-scale storage system → BESS Turnkey Solutions