YBDM-12 Series Underground Box-Type Substation

The YBDM‑12 series underground pad‑mounted substation refers to a complete set of equipment housed entirely within a fully sealed enclosure and installed below ground level. Like its above‑ground counterpart, it features identical internal components: a 10 kV input voltage is stepped down by a transformer to a distribution voltage of 400/220 V before being delivered to the load points. It can be used in ring‑network distribution systems or as a terminal substation for radial grid applications. The enclosure boasts excellent corrosion resistance, superior compressive strength, and absolute sealing. Guided by our mission to develop first‑class power equipment, enhance the urban environment, and serve society, our company has introduced and integrated advanced foreign technologies to create an environmentally friendly series of metal underground substations.

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Oil-Immersed Power Transformer Series

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Product Description

　　Product Overview:

　　　　The YBDM‑12 series underground pad‑mounted substation refers to a complete set of equipment housed entirely within a fully sealed enclosure and installed below ground level. Like its above‑ground counterpart, it features identical internal components: a 10 kV input voltage is stepped down by a transformer to a distribution voltage of 400/220 V before being delivered to the load points. It can be used in ring‑network distribution systems or as a terminal substation for radial grid applications. The enclosure boasts excellent corrosion resistance, superior compressive strength, and absolute sealing. Guided by our mission to develop world‑class power equipment, enhance the urban environment, and serve society, our company has introduced and integrated advanced foreign technologies to create an environmentally friendly series of metal underground substations.

Product Features:
　　1. The complete set of equipment for the fully underground, pre-assembled substation is entirely housed within a fully sealed enclosure. The interior of the enclosure is divided into a high-voltage switchgear room, a transformer room, and a low-voltage switchgear room. Each compartment is equipped with lighting, interlocking switches, and features forced ventilation, temperature control, heaters, and other auxiliary devices.
　　2. The enclosure is fabricated from stainless steel and treated with multi‑layer anti‑corrosion measures, ensuring that from the base to the wall surface it can withstand 50 years of underground immersion without exhibiting even the slightest sign of corrosion.
　　3. All sealing points, including equipment access openings, personnel entry/exit points, and cable penetration entries, must be capable of withstanding the seepage pressure of groundwater, with no water stains appearing on the interior side and maintaining a dry, non‑damp condition within the wall.
　　4. The narrower end of the enclosure is equipped with two water collection troughs, allowing rainwater to be swiftly drained into the sewer system during rainfall, thereby preventing it from entering the interior of the prefabricated substation.
　　5. In addition to draining rainwater, the water collection trough also serves as an air intake for internal circulation and ventilation. Air entering the enclosure through this inlet facilitates air exchange, helping to maintain a balanced temperature and humidity inside the enclosure and thereby reducing the transformer’s temperature rise.

　　Ordering Instructions:
　　When placing your order, please provide the following parameters:
　　1. Product Model
　　2. Rated Capacity
　　3. Voltage Combination
　　4. Scope of Adjustment
　　5. Frequency
　　6. Connection Group Designation
　　7. Short-circuit impedance
　　8. For products with special requirements, specify the technical specifications.