3 Phase Compact Unitized Substation

For procurement parties facing space constraints in urban or underground projects, our 3 Phase Compact Unitized Substation features a highly integrated design that combines transformer, HV/LV switchgear, and control system into a single unit. Compared to traditional split-type substations, it reduces installation space by 40%-60%, making it ideal for residential communities, commercial plazas, and urban rail transit projects. The compact structure also simplifies on-site layout planning, solving the pain point of complex spatial coordination for large-scale power distribution projects. Available in closed, open, and box-type layouts, it can be flexibly adapted to indoor and outdoor installation scenarios.

Safety is non-negotiable for your power system-our compact unitized substation adopts a Class H (180°C) insulation system for internal transformers. Windings are wrapped with Nomex paper and encapsulated by F1-level flame-retardant epoxy resin via vacuum casting (VPI) technology, eliminating oil leakage and fire risks. The entire unit has passed IEC 60076 and UL fire safety tests, with no toxic gas emission in case of fire. This design meets the strict safety requirements of hospitals, data centers, and basement power rooms, helping you avoid potential safety accidents and compliance risks.

To address heat accumulation issues in integrated units, we've equipped the substation with a centralized and efficient cooling system. The internal transformer adopts natural air cooling (AN) with optimized ventilation slots, and the unit's overall ventilation design ensures smooth air circulation. For high-load scenarios, optional forced air cooling (AF) with low-noise fans is available, supporting AN/AF automatic switching based on real-time temperature. The low-noise fans (≤55dB) and optimized iron core lamination reduce the unit's overall noise level to 48-65dB (depending on capacity), complying with IEC/GB noise standards and maintaining a quiet environment.

If your project is located in harsh environments, our compact unitized substation's robust environmental resistance will meet your needs. The unit's protection grade can be customized from IP30 to IP44, effectively resisting dust, moisture, and slight corrosion. It operates reliably in a wide temperature range of -25°C to 40°C and supports high-altitude operation up to 4500m, adapting to coastal high-humidity areas, dusty industrial zones, and highland projects. This solves the problem of poor environmental adaptability of ordinary substations, ensuring stable power distribution in complex conditions.

We understand that efficient operation and maintenance (O&M) is critical for you-our substation is equipped with a compact unitized substation intelligent central monitoring system. Built-in PT100 temperature sensors monitor transformer windings and core temperature in real time, with an intelligent thermostat providing temperature display, fan control, and over-temperature alarm functions. The system supports MODBUS/RS485 communication protocol, enabling remote monitoring of the unit's overall operation status (voltage, current, temperature, fault alerts) from the central control room. This reduces manual on-site inspection workload and improves fault diagnosis and response efficiency.

To shorten your project construction cycle, our compact unitized substation adopts a pre-assembled and pre-commissioned design. On-site installation only requires simple fixing and wiring (supporting copper bar and cable terminal connections), reducing on-site construction time by 70% compared to traditional substations. We also provide custom 3-phase compact substation solutions: you can customize rated capacity (50kVA-2000kVA), HV/LV voltage levels, protection grade, fan layout, and monitoring system configuration according to project drawings, perfectly matching your specific project needs.

All Kechang 3 Phase Compact Unitized Substations pass international certifications such as IEC 60076, CE, UL, and RoHS, and comply with EU EcoDesign and DOE energy efficiency regulations, ensuring product quality and global project compliance. With 18+ years of electrical equipment manufacturing experience, we provide a 3-year quality guarantee and complete pre-delivery inspection reports for each unit, with an expected service life of 25-30 years. Our professional team offers one-stop services from pre-sales technical scheme design to on-site installation guidance and after-sales maintenance, timely solving any problems encountered in your project.