Factory Direct European Style(YB)Compact Substation 11kv 22kv 33kv Outdoor Prefabricated Box-type Distribution Transformer Unit

The Factory Direct European Style(YB)Compact Substation 11kv 22kv 33kv Outdoor Prefabricated Box-type Distribution Transformer Unit is a factory-assembled outdoor power distribution solution engineered to IEC 62271-202 and GB/T 17467 standards. Manufactured by Zhejiang Jingyu Technology Co., Ltd., this prefabricated compact substation integrates a high-voltage switchgear compartment, a transformer compartment, and a low-voltage distribution panel into a single outdoor enclosure — eliminating on-site civil construction of a conventional transformer room. Available in 11kV, 22kV, and 33kV classes (plus 6kV, 10kV, and 10.5kV variants), with transformer capacities from 50 kVA to 2500 kVA, this outdoor prefabricated box-type distribution transformer unit is supplied factory-direct for utility, commercial, and industrial applications.

A critical point for procurement engineers: while this prefabricated compact substation arrives factory-tested, site civil work — foundation construction, cable trenching, and earthing grid installation — remains part of the project scope. Projects that overlook civil interface coordination encounter installation delays that frequently exceed equipment-related issues in schedule impact.

Core Technical Specifications

Configuration Selection Guide

Selecting the correct configuration for this compact substation requires matching the HV switching topology to the network connection type and the LV panel to the load profile. If your project connects to a ring-network feeder, an SF6 RMU with at least three ways is the standard starting point. If the grid authority or environmental specification prohibits SF6, solid-insulated RMU alternatives provide equivalent switching without SF6 gas. For radial feeder applications, a VCB panel or LBS + fuse combination reduces cost without compromising protection coverage.

On the LV side, reactive power compensation should be sized at the order stage when motor or inductive loads are present — retrofitting later is significantly more expensive. If load growth is anticipated, specifying spare feeder positions at procurement is substantially more cost-effective than structural expansion after commissioning.

• SF6 RMU (3-way / 4-way): Ring-network distribution — most common for utility and commercial substations
• Solid-Insulated RMU: SF6-free — EU projects, green building, environmental compliance
• VCB Panel (single or dual incoming): Radial feeder, generator backup, industrial plants
• MCCB LV Panel (8/12/16-way): Standard residential and commercial distribution
• Reactive Compensation (30%/40%/60%): Motor-heavy applications, power factor compliance
• Dual Incomer ATS + Dry-Type Transformer: Hospitals, data centers, critical loads

Typical Application Scenarios

The YB Series outdoor prefabricated compact substation is deployed across residential communities, commercial centers, industrial parks, hospitals, and renewable energy stations. For residential developments, the customizable enclosure — available in any RAL color with stainless steel or aluminum composite panel cladding — integrates with landscaping and architectural themes. Walk-in compartments allow routine maintenance without occupant disruption. Multi-feeder LV panels support diverse tenant power requirements, and the modular design accommodates future capacity additions without structural changes to the enclosure.

For wind farm and solar PV collector stations, the YB compact substation supports custom low-voltage input configurations (0.69kV, 0.8kV) to accommodate inverter output standards, stepping up to 10kV or 35kV for grid export. Reactive power compensation and voltage regulation support can be integrated at the LV panel level to meet grid connection requirements. For industrial parks with significant motor loads, draw-out LV panels and 60% reactive compensation banks with detuned harmonic filtering address power quality requirements and utility penalty avoidance.

In hospital and data center applications, the dual-incomer ATS configuration with dry-type transformer provides N+1 supply redundancy and eliminates oil-fire risk in occupied buildings. The independent three-compartment architecture allows HV or transformer maintenance without de-energizing the LV panel — a key operational advantage for facilities requiring continuous power supply availability throughout their operational lifecycle.

YB European-Type vs. ZGS American-Type Compact Substation

Unlike the ZGS (American-type) compact substation — where HV components and the transformer share an oil tank and HV maintenance requires tank access — the YB maintains fully independent fire-rated compartments with dedicated access doors. Transformer replacement and HV service are performed in separate rooms without cross-sectional de-energization. This compartment independence reduces maintenance-related outage risk over the substation's 25–30 year service life.

The trade-off is clear: the YB compact substation occupies approximately three times the floor area of a ZGS unit, with higher equipment cost. For roadside installations in space-constrained urban settings, the ZGS may be appropriate. For residential compounds, commercial districts, and industrial parks where walk-in maintenance and long-term serviceability are priorities, the YB architecture provides superior lifecycle value as an outdoor prefabricated box-type distribution transformer unit.

Commercial Terms

Zhejiang Jingyu Technology Co., Ltd. is an ISO 9001:2015 certified manufacturer of prefabricated compact transformer substations and medium-voltage distribution equipment, exporting to 80+ countries. KEMA type-test capability and full Factory Acceptance Test (FAT) programs are available for projects requiring third-party witness testing or grid authority pre-qualification documentation. Custom engineering services include non-standard voltage ratio substations, split-module transport designs for access-restricted sites, and solar PV-specific configurations. Contact us with your single-line diagram and site requirements for a customized technical and commercial proposal.

Product Gallery

FAQ

1. What is the standard configuration and voltage combination of your European type box substation?

Our European box substation adopts separate compartment design including high voltage chamber,transformer chamber and low voltage chamber. The common voltage combination is 10kV/0.4kV. We canadjust internal components, transformer type and overall layout according to your project grid conditionand actual load requirement.

2. What capacity range can you offer for this European box substation?

Available capacity covers 30kVA to 2500kVA. We can equip oil immersed or SCB dry type transformer inside the box as your preference, and customize the external dimension of the enclosure to match your on-site installation space limitation.

3. What IP protection grade does the box enclosure have? Can it adapt to outdoor harsh environment?

Standard enclosure IP44. We can upgrade anti-corrosion coating for coastal, high humidity or dustyoutdoor sites. The whole structure is specially designed for outdoor installation with reliable rainproof anddustproof performance.

4. What certification do you have for European type box substation?

All our European type box substations come with CE certification. Relevant CE documents can be provided for your tender submission and customs clearance.

5. What is your warranty period for European box substation?

We provide 10 years warranty for our European type box substation. Technical support will be available throughout the whole warranty period to solve your operation problems.