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YBM-12/0.4 Outdoor Prefabricated Substation (American Style)

The YBM-12/0.4 American Style prefabricated substation (also known as a pad-mounted transformer) is an integrated power distribution unit. Unlike the European style, it features a more compact design where the high-voltage load break switch and fuses are immersed in the transformer oil tank. It is highly efficient, cost-effective, and ideal for residential areas, public parks, and urban green belts where space and aesthetics are critical.

Product Overview

The American Style substation is characterized by its “dead-front” design and integrated structure. The transformer body, high-voltage load switch, and protective fuses are all placed within a sealed oil tank, which uses the transformer oil as both an insulating and cooling medium. This results in a significantly smaller volume and a simpler structure. The low-voltage compartment is attached to the front, providing a streamlined and safe interface for power distribution.

Product Features

  • Ultra-Compact Volume: Significantly smaller than European-style substations, making it easy to blend into urban landscapes.
  • Fully Sealed & Insulated: The high-voltage side uses elbow connectors (dead-front), ensuring no exposed live parts and providing maximum safety for the public.
  • Maintenance-Free Design: Due to the oil-immersed integrated structure, the internal components are protected from environmental contamination, reducing the need for frequent maintenance.
  • Corrosion Resistance: The enclosure is treated with specialized anti-corrosion coatings, suitable for harsh outdoor environments and coastal areas.
  • High Overload Capacity: The oil-immersed design provides excellent thermal stability and allows for reliable operation during peak load periods.

Technical & Artistic Details

The American-style substation is designed for high efficiency and low visual impact.

  • Low Noise Operation: The integrated design and specialized core construction minimize vibration and acoustic noise.
  • Simplified Installation: Arrives as a single unit, requiring only the connection of cables to the high-voltage and low-voltage terminals on-site.
  • Enhanced Safety: Equipped with pressure relief valves and oil temperature indicators to monitor the internal status of the transformer tank.

Model Meaning

Y B M – 12 / 0.4 – □

  • Y: Prefabricated (Yuzhuangshi)
  • B: Substation (Bianshandian)
  • M: American Style Design (American-type integrated)
  • 12: Rated High-Voltage (kV)
  • 0.4: Rated Low-Voltage (kV)
  • □: Rated Capacity (kVA)

Main Technical Parameters

Transformer & Protection Specifications

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