Compact and Integrated AIS Voltage Transformer Solution: Overcoming Space Constraints, Empowering Retrofit of Legacy Sites

During the upgrade and renovation of power supply systems in urban cores and rail transit, legacy substations often face the critical bottleneck of cramped space. Especially for Air-Insulated Switchgear (AIS), the dispersed arrangement of traditional Voltage Transformers (VTs) and their associated equipment (surge arresters, disconnectors) severely consumes valuable space, becoming a "bottleneck constraint" hindering retrofits and upgrades. To address this, we introduce the ​Compact and Integrated AIS Voltage Transformer Solution, centered on "minimizing footprint and maximizing integration," breaking through traditional design limitations.

​Core Innovations:​​

1. ​Revolutionary Tri-function Integration:​​
• ​Breaking Boundaries:​​ Highly integrates the Voltage Transformer (VT), surge arrester, and disconnector into a single compact module.
• ​Space Efficiency:​​ Achieves an astonishing 40% size reduction compared to traditional discrete arrangements.
• ​Enhanced Efficiency & Reduced Load:​​ Eliminates complex connections and redundant structures between discrete devices, significantly simplifying internal switchgear layout and secondary wiring.
2. ​Vertical Stacked Layout for Space Expansion:​​
• ​Leveraging Vertical Space:​​ Abandons traditional footprint-centric thinking, fully utilizing the vertical space resources within the enclosure.
• ​Stacked Design:​​ The core integrated module and its auxiliary units adopt a multi-layer vertical stacking arrangement.
• ​Minimalist Installation:​​ Modular design supports back-to-back mounting, drastically improving space utilization, ideal for confined dual-mounting spaces.
3. ​Directed, High-Efficiency Forced-Air Cooling Duct:​​
• ​Precise Temperature Control:​​ Specifically addresses the heat dissipation challenges arising from high integration with an innovatively designed directed airflow duct.
• ​High-Power Forced Cooling:​​ Combines high-efficiency, low-noise fans to create a robust, directed forced air convection flow within the module and its stacked structure.
• ​Power Density Breakthrough:​​ Revolutionary cooling technology elevates the power density of this integrated solution to a remarkable 5kVA/dm³ (5kVA per cubic decimeter), ensuring stable, full-power operation within an extremely compact footprint.

​Application Scenarios:​​

• Retrofit of land-scarce substations in city centers
• Power supply systems for space-constrained rail transit (subway, high-speed rail), especially underground or elevated stations
• Industrial parks and building power distribution stations with tight land resources
• Shipboard platforms, mobile substations, and any scenario with extreme space sensitivity

​Significant Advantages & Value:​​

• ​Footprint Reduction by 50%:​​ With equivalent functional configuration, the overall equipment footprint is only half that of traditional solutions, completely overcoming space constraints at legacy sites.
• ​Extreme Adaptability:​​ Perfectly fits ultra-compact housing environments (e.g., 3m×2m cabins), providing a reliable solution for space-constrained scenarios.
• ​Doubled Deployment Efficiency:​​ Integrated modular design and simplified installation methods significantly shorten on-site construction and commissioning cycles.
• ​Enhanced Reliability:​​ Optimized cooling and layout reduce thermal hotspots and failure risks, resulting in stronger system stability.
• ​Total Lifecycle Cost Optimization:​​ Significantly saves valuable land resource investment, reduces civil works and installation costs, and simplifies later operation and maintenance.