Prefabricated Substations
YB0-12/0.4 Compact Prefabricated Substation
Model YB0-12/0.4
Combines medium-voltage equipment, a transformer and low-voltage distribution in a prefabricated enclosure. Suitable for ring-network or terminal supply arrangements serving industrial sites, residential developments and public distribution networks.
Share your rated data, quantity and project requirements.
View this model in our 2026 catalog ↗
Project configuration reviewTechnical documentation support
Product Overview
YB0-12/0.4 prefabricated substation is designed for ring network or terminal power supply applications. It is commonly used for urban public power distribution and street lighting projects and industrial, mining, commercial, and residential electrical projects, with the final selection based on rated data, drawings, and site conditions.
EPC companies, electrical contractors, utilities, developers, and overseas distributors can request configuration review for prefabricated substation. Please send transformer capacity, HV/LV voltage combination, enclosure layout, foundation drawing, and incoming / outgoing cable scheme, quantity, destination, and any project standard requirements for quotation.
Model and Meaning
- YB: high-voltage / low-voltage prefabricated substation
- Layout code: identifies the enclosure layout shown in the technical document
- High-voltage side rated voltage, low-voltage side rated voltage, and transformer rated capacity must be selected for the ordered configuration
Technical Specifications
YB0-12/0.4 Technical Parameter Table
Review the YB0-12/0.4 rated data, selected configuration, and project requirements before quotation.
| Group | Item | Unit | Parameter |
|---|---|---|---|
| High-voltage unit | Rated frequency | Hz | 50 |
| Rated voltage | kV | 6 / 10 / 35 | |
| Maximum operating voltage | kV | 6.9 / 11.5 / 40.5 | |
| Rated current | A | 400 / 630 / 1250 | |
| Transfer current | A | 1200-3150 | |
| Power-frequency withstand voltage to ground and phase / isolating break | kV | 42 / 48 | |
| Lightning-impulse withstand voltage to ground and phase / isolating break | kV | 75 / 85 | |
| Rated short-circuit breaking current, current-limiting fuse | kA | 31.5 | |
| Transformer unit | Rated voltage | kV | 6 / 10 / 35 |
| Rated capacity | kVA | 30-2000 | |
| Tap range | % | +/-2 x 2.5% / +/-5% | |
| Connection group | Yyn0 / Dyn11 | ||
| Impedance voltage | % | 4 / 4.5 / 6 / 8 | |
| Low-voltage unit | Rated voltage | V | 220 / 380 / 690 / 800 |
| Main-circuit rated current | A | 50-4000 | |
| Branch current | A | 5-800 | |
| Enclosure | Protection level, conventional products | High-voltage room IP33; transformer room IP23; low-voltage room IP33 | |
| Noise level | dB | <= 50 |
Installation Dimensions / Drawing
Applications
YB0-12/0.4 is mainly selected for urban public power distribution and street lighting projects and industrial, mining, commercial, and residential electrical projects. The final application should match the confirmed prefabricated substation, rated data, and site installation conditions.
- Urban public power distribution and street lighting projects
- Industrial, mining, commercial, and residential electrical projects
- Construction sites, parks, docks, hotels, and related distribution applications
Ordering Instructions / Information Required for Quotation
ForYB0-12/0.4, send transformer capacity, HV/LV voltage combination, enclosure layout, foundation drawing, and incoming / outgoing cable scheme, quantity, destination, and the expected delivery schedule. The engineering review will be based on the selected prefabricated substation and project drawing.
ORDERING INSTRUCTIONS
- Provide the model, capacity, quantity, color, size requirements, and enclosure material.
- Confirm transformer model, performance, connection group, tap range, and impedance requirements.
- Provide the high-voltage and low-voltage primary wiring scheme and component specifications.
- Confirm transformer-oil requirements: 25#, 45#, or high-flash-point oil.
- State any power intelligent-management network or property-management access requirements for the box-type substation.
- Provide the use-environment requirements.
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