Box Type Substation (10kV - 40.5kV) | Prefabricated Modular Compact Substations
Box type substations integrate high-voltage switchgear, distribution transformers, low-voltage switchboards, and auxiliary environmental controls within a factory-tested, weather-resistant enclosure. Engineered for utility grids, renewable energy plants, industrial complexes, and commercial infrastructure, these prefabricated units step down distribution voltages (up to 40.5kV) to operational low-voltage power (0.4kV - 0.8kV).
Manufactured in full compliance with IEC 62271-202, each substation is shipped fully wired, assembled, and routine-tested to minimize field installation time and civil works on site.
Product Types & Enclosure Configurations
|
Substation Type |
Structural Design |
HV Switchgear Options |
Transformer Range |
Primary Applications |
|
European Style Compact Substation |
Compartmentalized layout (HV, Transformer, LV separated) |
SF6 RMU / Air-Insulated Switchgear |
100 kVA - 3150 kVA (Oil / Dry-type) |
Urban distribution, commercial real estate, industrial parks |
|
American Style Pad-Mounted Substation |
Integrated transformer tank with side/front HV & LV cabinets |
Load break switch with bay-o-net fuses |
100 kVA - 2500 kVA (Liquid-immersed) |
Residential neighborhoods, underground cable loops, renewable collectors |
|
Solar / Wind Skid Substation |
Open skid or containerized modular housing |
35kV / 40.5kV GIS or AIS units |
1250 kVA - 6300 kVA (High-efficiency oil type) |
Utility-scale PV inverter stations, onshore wind turbine step-up loops |
|
Special Industry Substation |
Non-metallic GRC / Stainless steel reinforced housing |
Custom switchgear combinations |
Customized capacity |
Coastal high-salinity zones, mining operations, mobile temporary power |
Technical Specifications
|
Parameter |
European Type (YB Series) |
American Type (ZGS Series) |
Containerized / Skid Substation |
|
Rated High Voltage (kV) |
12 / 24 / 36 / 40.5 |
12 / 24 / 36 |
33 / 35 / 40.5 |
|
Rated Low Voltage (kV) |
0.4 / 0.69 |
0.4 |
0.69 / 0.8 |
|
Rated Capacity (kVA) |
100 - 3150 |
100 - 2500 |
1250 - 6300 |
|
Transformer Options |
Hermetically Sealed Oil / Cast Resin Dry |
Mineral Oil / Ester Fluid Immersed |
Natural Ester / Synthetic Fluid Oil Type |
|
Enclosure Protection Rating |
IP43 (Transformer) / IP54 (HV/LV) |
IP54 / NEMA 3R equivalent |
IP54 / IP55 |
|
Internal Arc Classification (IAC) |
AB 20kA 1s / AB 25kA 1s |
Tested per IEEE C37.74 |
AB 31.5kA 1s |
|
Corrosion Class (ISO 12944) |
C3 (Standard) / C4 / C5 (Marine grade) |
C3 / C4 |
C4 / C5-M |
|
Enclosure Wall Construction |
Double-layer sandwich panel / Aluminum-zinc steel |
Heavy-gauge powder-coated steel |
2.0 mm - 4.0 mm Corrugated steel container |
|
Operating Temperature Range |
-40 deg C to +50 deg C |
-30 deg C to +45 deg C |
-40 deg C to +55 deg C |
Renewable Energy Plants: Collector substations stepping up inverter output voltages (0.69kV / 0.8kV) to 33kV / 35kV / 40.5kV grid tie lines.
Utility Distribution Grids: Compact ring main distribution nodes for municipal expansion and underground power conversions.
Heavy Industrial Facilities: Dedicated primary power intake stations for mining, chemical plants, ports, and steel fabrication yards.
Critical Commercial Infrastructure: Standby and continuous power distribution centers for data centers, hospitals, and transportation hubs.
Engineering Customization Options
High-Voltage Component Sourcing
Option to specify Ring Main Units (RMUs) or Vacuum Circuit Breakers (VCBs) from ABB, Schneider, Siemens, or certified OEM equivalent lines.
01
Enclosure Materials & Finishes
Choice of aluminum-zinc coated steel, stainless steel (304 / 316L), glass-fiber reinforced cement (GRC), or thermal sandwich panels with polyurethane cores.
02
Smart Climate Control
Automated forced-air ventilation, anti-condensation heaters, internal humidity sensors, and air conditioning units for hot or arctic environments.
03
Monitoring & Communication
Factory pre-wiring for SCADA integration, smart digital meters, RS485 / Modbus / IEC 60870-5-104 gateways, and oil temperature/gas relay alarm circuits.
04
Factory Acceptance Testing (FAT)
Every completed box type substation undergoes integrated factory acceptance testing prior to dispatch:
Complete Loop Dielectric Test: Power-frequency AC withstand testing across high-voltage, low-voltage, and transformer interconnections.
Transformer Routine Testing: No-load loss, load loss, winding resistance, and transformer turn ratio (TTR) verification.
Mechanical & Interlock Operations: Verification of mechanical safety interlocks between HV switches, earthing switches, and enclosure doors.
Protection Circuit & Secondary Injection: Testing of protection relays, CT/PT ratios, and control circuit wiring continuity.
Environmental Sealing & Rain Test: Pressurized water spray testing verifying IP54 enclosure integrity against water ingress.
Compliance Standards
IEC 62271-202: High-voltage / low-voltage prefabricated substations.
IEC 60076: Power transformers design and testing standards.
ISO 9001:2015 / ISO 14001: Quality management and environmental protection protocols.
Packaging, Delivery & Lead Times
Structural Lifting Rigidity
Base frames feature heavy-duty structural channel steel with integrated lifting lugs rated for full-load crane hoisting without cabinet distortion.
Ocean Transit Protection
Enclosures are sealed in heavy-duty vapor barrier wrapping, equipped with internal desiccant packs, and packed into steel-skid wooden crates or shipped directly as certified ISO container units.
Production Lead Time
4 to 6 weeks following final engineering drawing approval (SLD and layout sign-off).
As one of the most experienced box type substation manufacturers and suppliers in China, we also support customized service. We warmly welcome you to buy high quality box type substation from our factory. If you have any enquiry about pricelist, please feel free to email us.
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