12/0.4kV Prefabricated Secondary Distribution Substation
✅Factory Manufacture, Reliable Quality
✅Small Footprint, Flexible Layout
✅High Safety,fully enclosed
✅Easy Expansion and Relocation
- Product Introduction
12/0.4kV Prefabricated Secondary Distribution Substation(also called box type substation 12kV/0.4kV) is a complete, pre-assembled, outdoor-installed power distribution device that converts 10/12kV medium-voltage electrical energy into 0.4kV low-voltage electrical energy and distributes it to end users. It integrates all the functions of a traditional built substation into one or several transportable metal enclosures.
Core Functions:
1. Voltage Transformation: Steps down voltage from 10/12kV to 0.4kV via the transformer.
2. Power Distribution: Distributes electrical energy to multiple outgoing circuits through low-voltage switchgear for end-user consumption.
3. Protection and Control: Provides overload, short-circuit, earth fault protection for the transformer and low-voltage circuits, and enables remote monitoring and metering.
4. Power Factor Correction: Often integrates low-voltage reactive power compensation devices to improve grid efficiency.
Main Components
| Compartment | Core Equipment |
|---|---|
| High-Voltage (HV) Compartment | 12kV Ring Main Unit (RMU) (SF₆ or Vacuum Insulated) • Incoming Unit (with load-break switch or circuit breaker) • Outgoing Unit (for transformer protection, often using a "switch-fuse" combination) • Possible metering or surge arrester unit |
| Transformer Compartment | 12/0.4kV Distribution Transformer • Capacity: Typical range from 315kVA to 1600kVA. |
| Low-Voltage (LV) Compartment | 0.4kV Low-Voltage Switchgear Assembly • LV Main Circuit Breaker (Air Circuit Breaker - ACB) • Multiple Feeder Circuit Breakers (Molded Case Circuit Breakers - MCCB) • Automatic Reactive Power Compensation Device (Capacitor Banks) • Intelligent Monitoring/Measurement Units (for data acquisition and communication) |
Prominent Advantages
● High Reliability: Factory prefabrication eliminates on-site assembly errors; independent compartments prevent fault propagation.
● Flexible Configuration and Expansion: High-voltage RMUs and low-voltage switchgear can be added or reduced modularly as needed, offering strong adaptability.
● Excellent Operation and Maintenance Convenience: Each functional compartment has an independent door with clear equipment layout, making inspection, maintenance, and equipment replacement very convenient.
● Powerful Function Integration: Easily integrates intelligent monitoring systems (SCADA), remote communication (DTU/FTU), enabling the "four telemetries" (telemetry, teleindication, telecontrol, and teleadjustment). It is an ideal node for distribution network automation.
● Strong Environmental Adaptability: High enclosure protection rating (IP40 or above), suitable for harsh outdoor environments; appearance can be beautified to blend with urban landscapes.
Typical Application Scenarios
● Urban Public Distribution: Power distribution centers for streets, parks, and street lighting.
● Residential and Commercial Areas: Dedicated substations for large communities, shopping malls, and office buildings.
● Industry and Infrastructure: Primary distribution points for factories, airports, ports, railways, and data centers.
● New Energy Sector: Grid connection points for wind farms and photovoltaic power stations.
● Temporary Power Supply: Temporary power sources for large construction projects and event venues.
Our Partners
Buseinss partner: State grid, China Southern Power Grid, China Huaneneg, Sdic Power, CHD, TK, Sinopec, Petrochina, China Guodian, Aux, China Railway, China Railway Construction, CNNC, China mobile,Life's Good,Tianneng, China 3 Gorges, CR power, Siemens and CATL.
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