Prefabricated Compact European Type Substation

A Prefabricated Compact European type Substation is a factory-assembled, three-chamber enclosed power distribution unit designed to receive, transform, and distribute medium-voltage electricity to low-voltage loads. Unlike traditional concrete-built substations that require weeks of on-site construction, this unit arrives ready for connection.

What is it?

The Prefabricated Compact European type Substation (also known as a European box substation) consists of three distinct, separated compartments:

1. High-voltage (HV) compartment: Houses switchgear, protection relays, and metering devices.

2. Transformer compartment: Contains a oil-immersed or dry-type transformer.

3. Low-voltage (LV) compartment: Contains distribution panels, circuit breakers, and outgoing feeders.

These three chambers are arranged in an "I" or "II" shape within a single, weatherproof steel or composite enclosure. Every compartment is physically separated by metal partitions to prevent fault propagation.

What can it do?

This equipment performs three core functions:

1. Step-down voltage conversion: Converts incoming medium voltage (6kV, 10kV, 20kV, 35kV) into usable low voltage (400V, 230V).

2. Protection and isolation: Automatically isolates faulted circuits via fuses or circuit breakers, protecting downstream assets.

3. Load management: Distributes power to multiple outgoing circuits, enabling selective switching, metering, and monitoring.

Because the Prefabricated Compact European type Substation is pre-wired and tested at the factory, it eliminates complex on-site wiring errors. It serves as the nerve center for final power distribution in residential blocks, factories, solar farms, and EV charging stations.

Product Advantages

When you choose the Prefabricated Compact European type Substation from Lugao Power, you gain five distinct competitive advantages over conventional substations and American-type alternatives.

Advantage 1: Superior Personnel Safety

The three-compartment "compartmentalized" design is the hallmark of any genuine Prefabricated Compact European type Substation. Each section is fully interlocked with mechanical and electrical interlocks. For example, the LV door cannot open unless the main breaker is OFF; the HV door cannot open unless the earthing switch is CLOSED. This sequential safety logic prevents live-front exposure, drastically reducing arc-flash risks for operators. American-type substations, in contrast, often have exposed live parts during fuse replacement.

Advantage 2: Uninterrupted Power Supply Capability

Unlike American-type units where replacing a fuse requires de-energizing the entire transformer, our Prefabricated Compact European type Substation allows independent maintenance. You can open the LV compartment for meter reading while the HV side remains live. More advanced versions can accommodate a loop-switching RMU (Ring Main Unit), enabling a "two-in, two-out" configuration that maintains power to downstream customers even during upstream faults. This makes it indispensable for hospitals and data centers.

Advantage 3: Excellent Thermal Management

Each transformer compartment features forced ventilation (automatic thermostatically controlled fans) plus natural convection louvers. The physical separation means heat generated by the transformer does not affect sensitive electronic relays in the HV compartment. Our tests show internal temperature stays 15–20°C lower than non-segmented designs during summer peak loads, directly extending insulation life.

Advantage 4: Extreme Environmental Adaptability

Built to IP54 minimum (dust-tight and protected against water jets), the enclosure withstands salt spray, sandstorms, and heavy rain. A 40mm air gap plus anti-condensation heaters prevent internal moisture. Operating range: -40°C to +55°C. This robustness is why the Prefabricated Compact European type Substation is the default choice for coastal wind farms and desert solar projects.

Advantage 5: Lower Total Cost of Ownership (TCO)

Initial purchase price may be 15–20% higher than a comparable American-type unit, but TCO over 20 years is 30% lower. Why? European-type units have replaceable, modular components (you change only a faulty fuse, not the whole busbar). Oil containment sumps prevent ground contamination fines. Minimal civil works (just a flat concrete pad) versus building a concrete room saves $5,000–$10,000 per unit in installation labor.

Product Features

Below are the specific engineering features of our Prefabricated Compact European type Substation:

Production Details

Lugao Power manufactures every Prefabricated Compact European type Substation in our ISO 9001-certified 25,000m² factory. Below are key production details that differentiate our quality.

Material Selection

Steel: Imported DX51D+Z275 galvanized steel, sheared and bent on a CNC turret punch (tolerance ±0.2mm).

GRP (Glass Reinforced Polyester): Offered for coastal orders – zero corrosion, but higher cost. Fire retardant class VO (UL94).

Transformer Core: Amorphous metal or CRGO silicon steel (M5 grade, 0.23mm thickness). No-load loss reduced by 70% compared to standard steel.

Assembly Process

Compartment fabrication: Separate welding jigs for HV, Transformer, and LV sections. Each compartment is leak-tested with a soap solution (for oil containment).

Painting: Pretreatment (degreasing, phosphating) → Epoxy primer (80μm) → Polyester topcoat (70μm). Salt spray test: 720 hours without creepage.

Internal wiring: Halogen-free, 90°C-rated copper cables, crimped with hex dies (pull-out test >200N). All terminals labeled with heat-shrink markers.

Transformer installation: Oil-filled transformers undergo vacuum drying (residual moisture <0.5%). Dry-type transformers are impregnated under vacuum pressure (VPI) twice.

Quality Control Checks

1. Dielectric test: 28kV/1min for HV side; 3kV/1min for LV side.

2. Heat run: Full load at 40°C ambient for 8 hours; temperature rise monitored by 12 PT100 sensors.

3. IP test: Dust chamber for 8 hours, followed by water jet test (12.5mm nozzle at 100 liters/min).

4. Functional interlock test: 50 open-close cycles on every switch.

Customization Options

1. Color: RAL 7035 (light gray) standard; any RAL code upon request (+15 days lead time).

2. Cable entry: Bottom (through plinth) or side (gland plates).

3. Smart features: IoT-enabled remote monitoring (current, voltage, temp, door status) via 4G/WiFi.

Packaging, Shipping, Warranty

Packaging & Shipping

Each Prefabricated Compact European type Substation is lifted using four built-in lifting lugs (tested to 2× gross weight). Packaging procedure:

● Interior: Silica gel desiccant packs (2kg) placed inside each compartment to absorb transit moisture.

● Cable entries: Sealed with plastic caps and self-vulcanizing tape.

● Exterior: Stretch-wrapped with VCI (Vapor Corrosion Inhibitor) film, then covered with a heavy-duty waterproof tarpaulin.

● Crating: Bolted onto a steel shipping skid (1200mm height for forklift pockets). Corner protectors and strapping bands.

Lead time: 25 working days for standard 630kVA unit; 35 days for custom orders (including smart metering).

Warranty & After-Sales

Warranty period: 12 months from date of commissioning or 14 months from shipment (whichever comes first).

Coverage: All manufacturing defects in materials or workmanship. Does not cover damage from lightning, flooding, overloading beyond nameplate, or unauthorized modifications.