he YB Series Prefabricated Substation is a compact, integrated power distribution unit that combines high-voltage electrical equipment, transformers, and low-voltage electrical apparatus. It is designed for use in diverse settings such as urban high-rise buildings, urban and rural construction sites, luxury villas, parks and squares, residential communities, high-tech development zones, small to medium-sized factories, mining and oil fields, and temporary construction sites, serving to receive and distribute electrical power within a distribution system. This product complies with the national standard GB/T17467 “High-voltage/Low-voltage Prefabricated Substations” and the technical specification SD320 “Technical Conditions for Compact Substations”.
The YB Series Prefabricated Substation is a product series independently designed and developed by our company to meet the needs of urban power grid construction. This series integrates medium-voltage switchgear, transformers, and low-voltage distribution equipment into a complete packaged unit according to specific wiring schemes.
This prefabricated substation series is suitable for 12kV, 50Hz three-phase AC systems, with capacity configurations up to 1600 KVA. It is ideal for applications in residential communities, commercial buildings and hotels, large construction sites, high-rise buildings, industrial and mining enterprises, and temporary construction sites. It is suitable for both ring main and radial terminal power supply systems.
The series features a compact structure, high degree of factory assembly, safe and reliable operation, easy maintenance, and an aesthetically pleasing design. Its advantages include small size, minimal land occupation, a wide range of customizable options, reduced on-site installation work, short installation and commissioning cycles, and the flexibility to be relocated close to load centers.
◆ Ambient Air Temperature: Maximum +40°C, Minimum -25°C.
◆ Altitude: Not exceeding 2000 meters. Can be used up to 4000 meters with specially ordered transformers and low-voltage components.
◆ Installation Site: Vertical inclination not exceeding 5°, free from severe vibration and impact.
◆ Relative Humidity: Not exceeding 90% (at +25°C).
◆ Atmosphere: Free from conductive dust, explosive hazards, and gases corrosive to metals and electrical components.
◆ Outdoor Wind Speed: Not exceeding 35 m/s.
◆ Enclosure: Designed with reference to advanced international technology and practical needs. Features include robustness, good thermal insulation and ventilation, dust protection, protection against small animals, aesthetic appearance, and ease of maintenance. Various enclosure materials are available, such as aluminum alloy plate, steel plate, composite plate, stainless steel plate, and non-metallic materials (e.g., glass fiber reinforced concrete).
◆ Electrical Configuration: The high-voltage side typically employs load-break switches or optionally vacuum circuit breakers, equipped with comprehensive anti-misoperation interlocking. Options include SF6 ring main units like XGN20-12L, and ring main switchgear like HXGN15A and HXGN17. Transformers can be oil-immersed, fully sealed, or dry-type. The low-voltage compartment can be equipped with GGD-type distribution boards.
◆ Protection & Metering: The substation offers complete protection, ease of operation, and optional high/low-voltage metering. Automatic reactive power compensation devices can be supplied based on customer requirements.
◆ Thermal & Condensation Management: The roof is a double-layer structure filled with foam plastic for excellent thermal insulation. Independent interior ceilings are designed for the high and low-voltage compartments. The transformer compartment is equipped with anti-condensation measures and automatic temperature monitoring, heating, and cooling devices.
◆ Ventilation: The cabinet employs natural ventilation, with forced ventilation options available. Dust filters are installed on door and side panels corresponding to the louver positions.
◆ Installation: After positioning the product on the foundation, tighten the anchor bolts, then install incoming/outgoing cables. A comprehensive inspection should be performed before energization.
◆ Maintenance (Fuse Replacement): To replace high-voltage fuses, the load-break switch must be opened first before accessing the compartment for operation or maintenance.
◆ Inspection: Disconnect the power supply before inspection and proceed according to the instruction manual.
◆ Ordering: When placing an order, specify the model, specifications, quantity, types and specifications of electrical components, and the enclosure paint color.
◆ Special Requirements: Any other customer requirements can be discussed during the order placement.
