PREFAFRANCE prefabricated substations offer an optimised solution in terms of cost and installation speed. Thanks to factory prefabrication and controlled logistics, overall timelines are considerably reduced compared to traditional construction.
Installation Costs
- PREFAFRANCE monoblock concrete substation (1 transformer, approx. 3.28 × 2.38 × 3.045 m) → €6,000 to €10,000 excl. VAT (delivered assembled, transport and installation included)
- PREFAFRANCE modular concrete substation (2 transformers) → €10,000 to €15,000 excl. VAT (depending on configuration and options)
- HTA/LV connection (power > 160 kVA) → €14,000 to over €30,000 depending on location, power and network complexity
- Decennial maintenance → €400 to €600 for preventive maintenance of PREFAFRANCE equipment
Installation Lead Times
Thanks to factory prefabrication, PREFAFRANCE lead times are particularly short:
- PREFAFRANCE factory production: 2 to 12 weeks depending on order book and equipment level
- On-site installation & connection: 2 to 5 days (up to 7 days for modular substations)
- Studies and administrative procedures (Enedis/RTE): 2 to 8 weeks
- Civil engineering preparation (slab, earthworks, access): 1 to 3 weeks
Overall project duration: 2 weeks to 2–3 months, with only a few days for actual on-site installation.
PREFAFRANCE Substation Installation Steps
Studies & Authorisations (2 to 8 weeks)
- Definition of client requirements
- Site study and PREFAFRANCE integration plans
- Validation by Enedis/RTE and obtaining administrative permits
Civil Engineering Preparation (1 to 3 weeks)
- Earthworks, concrete slab, cable ducts, HV/LV reservations
PREFAFRANCE Factory Production (2 to 12 weeks, in parallel)
- Manufacture of concrete/steel enclosure
- Integration of equipment (ventilation, doors, rails, transformer, HTA/LV switchboards)
Delivery & Installation (1 to 2 days)
- Transport to site
- Craned into position
- Quality inspection and PREFAFRANCE acceptance report
Connections & Testing (2 to 5 days)
- HTA/LV cable connections
- Earthing installation
- Electrical testing and safety checks
Inspection & Energisation (1 to 2 days)
- Compliance verification
- Validation by network operator
- PREFAFRANCE substation commissioning
PREFAFRANCE Summary Table
| Prefabricated HV/LV Substation | Purchase & installation cost | 10-year maintenance | Production lead time | Installation lead time |
|---|---|---|---|---|
| Monoblock concrete (1 transformer) | €6,000 – €10,000 excl. VAT | ~€400 | 2 to 8 weeks | 2 to 5 days |
| Modular concrete (2 transformers) | €10,000 – €15,000 excl. VAT | ~€600 | 4 to 12 weeks | 2 to 7 days |
| HTA/LV connection >160 kVA | €14,000 – €30,000+ | Included | Depends on complexity | Depends on network |
Conclusion
PREFAFRANCE prefabricated substations significantly reduce lead times and costs compared to traditional construction. Thanks to their modular design and simplified installation, they offer a fast, reliable and safe solution, suited to both industrial and tertiary infrastructure needs.
