What Is a Compact Substation?
A compact substation integrates transformer, switchgear, low-voltage distribution and protection equipment into a compact enclosure. It is designed to save space while supporting safe and efficient power distribution for buildings, industrial sites, infrastructure and renewable energy projects.
Main Components
Transformer
The transformer converts incoming medium voltage into the required low-voltage supply for downstream loads. Oil-immersed or dry-type transformer designs may be used depending on application and environment.
Medium-Voltage Switchgear
Medium-voltage switchgear controls and protects the incoming power supply. It may include load break switches, fuses, circuit breakers or ring main units according to project requirements.
Low-Voltage Distribution Cabinet
The low-voltage section distributes power to downstream equipment, panels or buildings. It can include breakers, meters, busbars and protection devices.
Protection and Control Devices
Protection devices help isolate faults and support safe operation. Monitoring and metering components can improve operation visibility and maintenance planning.
Enclosure and Ventilation
The enclosure protects internal equipment from weather, unauthorized access and environmental conditions. Ventilation or thermal design should match the transformer capacity and operating environment.
Why Compact Substations Are Used
- Space-saving design for urban and infrastructure projects
- Integrated equipment for faster site deployment
- Customizable configuration for different voltage and load requirements
- Suitable for commercial, industrial and renewable energy applications
- Weather-resistant enclosure for outdoor installation
Selection Considerations
Before selecting a compact substation, confirm voltage level, transformer capacity, switchgear type, low-voltage outgoing circuits, installation location, enclosure protection, ventilation, standards and maintenance access.
NovaCova Compact Substation Solutions
NovaCova can provide project-specific compact substation configurations based on electrical design, site environment, local standards and customer requirements.
Typical Parameters to Confirm
| Main Sections | MV switchgear, transformer, LV distribution |
| Transformer Type | Oil-immersed or dry-type according to project |
| Installation | Outdoor or project-specific |
| Applications | Buildings, infrastructure, industrial sites, renewable energy |
| Customization | Voltage, capacity, enclosure, circuits, protection and monitoring |
Frequently Asked Questions
What equipment is inside a compact substation?
A typical compact substation includes medium-voltage switchgear, transformer, low-voltage distribution equipment, protection devices and enclosure systems.
Can the layout be customized?
Yes. Layout, voltage, capacity, outgoing circuits and protection devices can be configured according to the project.
Where are compact substations used?
They are used in commercial buildings, industrial facilities, infrastructure projects, residential developments and renewable energy projects.
Talk to NovaCova
Every power project has different voltage, capacity, environmental and safety requirements. NovaCova can support product selection, specification review and project-based transformer configuration for international customers.