The YBH series preassembled substation for photovoltaic and wind power generation, also known as the Hua-style preassembled substation (abbreviated as "Hua-style box substation"), complies with GB/T 17467 "High/Low Voltage Preassembled Substation." This product is suitable for voltage levels of 10kV/35kV, with a maximum capacity of up to 12,500kVA. Addressing the instability of new energy grids and the higher capacity requirements of step-up substations, the high-voltage side uses vacuum load switches or vacuum circuit breakers with a breaking current up to 31.5kA.

Main Features:

Large capacity, small footprint, safe, reliable, pollution-free; easy and safe operation and maintenance, unaffected by harsh weather; full thermal insulation protection, natural ventilation cooling; no need for oil change or refilling, eliminating concerns of American-style substations; no system downtime, power generation unaffected; transformer protected from direct sunlight, higher generation efficiency, oil quality unpolluted, 20-year warranty; compared to American-style substations, high-voltage load switch is separated from the oil tank, allowing flexible brand selection and easy replacement of load switches and fuses

Low-voltage side equipped with low-voltage bushings, low-voltage circuit breaker, low-voltage surge protector, dry-type transformer for maintenance lighting, uninterruptible power supply (UPS), and other necessary signal, protection, and metering components

All components use well-known domestic/international brands, enabling the box substation to pass national standard lightning impulse, power frequency withstand voltage, and induced withstand voltage tests, ensuring electrical safety during long-term operation

When the fan/inverter stops and the high-voltage circuit breaker/load switch is open, the low-voltage dry-type transformer is de-energized. The electromagnetic lock cannot be opened regardless of whether the high-voltage bushing is live, requiring an external key, posing a safety risk. To address this, our company equips the box substation with a UPS, ensuring the electromagnetic lock always has 220V operating power and can be opened when the high-voltage bushing is de-energized, avoiding user confusion and ensuring safe operation