YBM-12 prefabricated substation Key Specifications
- Product Series: YBCMC
- Product Brand: Yue Biao
- Rated Capacity: 30–1250 kVA (Transformer)
- High-Voltage Side Rated Voltage: 12 kV (Optional 6 kV, 3 kV)
- High-voltage side rated current: 630 A / 1250 A
- Low-voltage side rated voltage: 0.4 kV
- Low-voltage side rated current: 100–2500 A
- Rated frequency: 50 / 60 Hz
- High-voltage thermal withstand current: 20 kA / 2 s, 25 kA / 3 s
- High-voltage dynamic stabilized current: 63 kA
- Low-voltage dynamic withstand current: 30–60 kA
- High-voltage power frequency withstand voltage: 42 kV / 1 min
- Low-voltage power frequency withstand voltage: 2 kV / 1 min
- Enclosure structure: Square or triangular
- Protection rating: IP3X to IP54 (enclosure)
- Design life: >30 years

Product Overview:
The YBM-12 pre-assembled substation is designed for 10 kV ring network power supply, dual-source power supply, or terminal power supply systems, serving as a complete unit for transformation, distribution, metering, compensation, control, and protection. In addition to the transformer, the high-voltage side is equipped with a four-position (or two-position) load switch, backup protection fuses, and plug-in fuses. The low-voltage side can be customized with control devices, distribution equipment, compensation units, and metering instruments according to user requirements. Transformer oil serves as the insulation and arc-quenching medium.
Primarily applied in industrial and civil power field ring networks and end-of-line power supply projects, this product is suitable for urban high-rise buildings, urban and rural structures, residential communities, lighting technology development zones, small and medium-sized factories, mining and oil fields, and temporary construction sites. It serves to receive and distribute electrical energy within power distribution systems. The entire product features compact size, simple installation, low noise, low losses, comprehensive protection, easy maintenance, and high cost-effectiveness.











