A compact prefabricated substation combines medium-voltage switchgear, a transformer and low-voltage distribution equipment in a factory-assembled enclosure. It reduces on-site construction work and provides a compact power-distribution solution for projects with limited space or a demanding schedule.
Main Components of a Prefabricated Substation
Medium-Voltage Compartment
This section receives the utility supply and contains switching, isolation, metering and protection equipment. The configuration may include a ring main unit, load-break switch, fuse combination or circuit breaker.
Transformer Compartment
The transformer can be oil-immersed or dry-type depending on fire-safety, footprint, noise, maintenance and environmental requirements. Ventilation must match the transformer loss and site temperature.
Low-Voltage Compartment
The low-voltage section distributes power to downstream loads and may include the main breaker, outgoing feeders, capacitor compensation, metering, automatic transfer and communication equipment.
Benefits for Project Delivery
- Factory assembly and inspection before shipment
- Shorter installation and commissioning schedule
- Reduced civil construction and compact footprint
- Coordinated electrical and mechanical design
- Flexible layouts for different incoming and outgoing schemes
How to Select the Right Configuration
Define the Electrical System
Provide incoming voltage, transformer capacity, secondary voltage, short-circuit level, feeder quantities, protection philosophy and metering requirements.
Review the Site
Consider ambient temperature, altitude, dust, humidity, corrosive atmosphere, flood level, snow and wind loading. The enclosure material, IP rating, roof and ventilation system must suit the environment.
Plan Maintenance and Access
Confirm door positions, operating corridors, cable entry, lifting points and replacement access. A compact design still needs safe operation and practical maintenance space.
Common Applications
Prefabricated substations are used for factories, commercial buildings, residential developments, mines, construction sites, solar and wind farms, EV charging hubs and municipal infrastructure.
See the XNET YB-PRE Compact Prefabricated Substation or request a customized single-line solution.
