Intelligent Prefabricated Outdoor Box-Type substation

What Is This Equipment?

The YB-24 Intelligent Prefabricated Outdoor Box-Type Substation is a factory-assembled, compact power distribution unit that integrates high-voltage switchgear, a power transformer, and low-voltage distribution equipment into a single weatherproof enclosure. It belongs to the family of prefabricated substations, also known as “compact substations” or “packaged substations.”

Model Code Breakdown:

YB — Prefabricated Box-Type Substation

24 — Design series code, representing intelligent control and modular configuration

What does it do?

The core function of this equipment is to receive high-voltage electrical energy (typically 10kV or 35kV), step it down to low-voltage (400V/380V) through an integrated transformer, and distribute it safely to end-user loads such as residential communities, commercial plazas, factories, or EV charging stations.

Unlike traditional civil-built substations, the YB-24 does not require on-site assembly of individual components. It is fully pre-wired, pre-tested, and shipped as a single unit. It uses an oil-free dry-type or biodegradable oil-filled transformer (optional) and relies on natural or forced air cooling. The intelligent control system enables remote data acquisition, fault alarm, and automatic switching, making it ideal for smart grid applications.

Product Advantages

The YB-24 Intelligent Prefabricated Outdoor Box-Type Substation offers clear advantages over traditional substations:

1. Space Saving & Quick Installation

Occupies only 40% of the footprint of a conventional civil substation

Can be installed on a simple concrete pad within 2-3 days

No need for separate equipment rooms or ventilation shafts

2. High Intelligence

Standard equipped with RTU (Remote Terminal Unit)

Supports 4G/5G or fiber communication

Real-time monitoring of voltage, current, power factor, temperature, and door status

Remote trip/close and parameter adjustment

3. Safety & Environmental Protection

Oil-free design optional (dry-type transformer)

Arc-resistant high-voltage compartment

IP54 protection rating prevents dust and water ingress

Cable entry from bottom, eliminating exposed live parts

4. Cost-Effective Lifecycle

30–40% lower initial investment than civil substations

60% reduction in civil engineering costs

Lower maintenance cost due to modular component replacement

5. Adaptability to Harsh Environments

Operating temperature range: -25°C to +55°C

Anti-corrosion coating for coastal or industrial areas

Internal heating system optional for cold regions

Product Feature

Product Application

The YB-24 Intelligent Prefabricated Outdoor Box-Type Substation is suitable for a wide range of scenarios where fast deployment, small footprint, and intelligent operation are required.

Production Details

1. Enclosure Manufacturing

CNC punching, bending, and welding for high precision

Double-layer powder coating (zinc-rich primer + polyester top coat) ≥80μm

Salt spray test ≥500 hours

Roof with 5° slope to prevent water pooling

2. Internal Layout

HV compartment: SF6 ring main unit or load break switch, lightning arrester, high-voltage fuse

Transformer compartment: Transformer mounted on rollers, removable front panel for easy maintenance

LV compartment: Main breaker, branch breakers, automatic capacitor bank, intelligent monitoring terminal

All compartments separated by fireproof metal partitions (Class A)

3. Intelligent System Details

Temperature monitoring: PT100 sensors on transformer windings and enclosure interior

Door status: Magnetic contact switch with alarm to cloud

Energy metering: Class 1 or 0.5S bidirectional meter

Remote control: Supports IEC 60870-5-101/104, DNP3.0

Local control: Password-protected HMI with event logging

4. Cable Entry & Grounding

Bottom cable entry with rubber grommets (IP54 rating maintained)

Dedicated copper grounding busbar (40×4mm) throughout all compartments

Grounding resistance ≤4Ω

5. Quality Testing Before Delivery

Power frequency voltage withstand test (35kV for HV side, 2.5kV for LV side)

Transformer turns ratio and no-load loss test

Intelligent system communication test (30 min continuous ping)

Rain test (simulated 10mm/min for 1 hour)

Packaging & After-Sales Service

Packaging

Entire unit wrapped in stretch film + corrugated cardboard corners

Wooden pallet base with forklift slots

Desiccant bags inside enclosure to prevent moisture during shipping

All external openings sealed with waterproof tape

After-Sales Service Commitment

Warranty Period: 12 months from date of shipment (extendable to 24 or 36 months with paid service contract)

Frequently Asked Questions (FAQ)

Q1: Is the YB-24 Intelligent Prefabricated Outdoor Box-Type Substation suitable for coastal areas with high salinity?

A: Yes. The standard enclosure uses anti-corrosion powder coating with a thickness ≥80μm and passes a 500-hour salt spray test. For highly corrosive environments (e.g., ports, chemical plants), we offer stainless steel 304/316 enclosures and additional coating on internal busbars.

Q2: Can the transformer be replaced without replacing the entire substation?

A: Yes. The transformer compartment is designed with removable side panels and roller rails. The transformer can be pulled out from the front or side, and a replacement unit can be inserted without disturbing the HV or LV compartments. This modularity is a key feature of the YB-24 design.

Q3: Does the intelligent system support connection to a third-party SCADA system?

A: Yes. The standard controller supports Modbus RTU over RS485 and Modbus TCP over Ethernet. It can also be configured for IEC 60870-5-101/104 or DNP3.0 protocols. We provide a complete register map for system integration.

Q4: Is the YB-24 allowed to be placed near residential buildings regarding noise limits?

A: Yes. With a dry-type transformer, noise level is ≤55dB at 1 meter, which meets residential limits. For oil-immersed transformers, we add vibration damping pads and an acoustic enclosure inside the transformer compartment, reducing noise to ≤48dB.

Q5: What is the standard delivery time?

A: For standard configurations (800kVA or below, IP54, steel enclosure, with ring main unit), delivery is 15---20 working days after order confirmation. Custom projects (stainless steel, special color, extra height for overhead line entry) require 25---30 working days.

Q6: What transformer types are available for the YB-24?

A: The YB-24 can be configured with oil-immersed transformers such as S13/S20 or epoxy resin cast dry-type transformers such as SCB13/SCB14, depending on project requirements, installation environment, fire-safety requirements, and local standards.