The 300 kW On-Grid/Off-Grid Transfer Switch (STS) adopts a hybrid topology with a transfer time of less than 15 ms. It supports millisecond-level fault response and integrates grid phase tracking, enabling seamless transitions between grid-connected and off-grid operation in coordination with a PCS. The unit delivers over 99.9% efficiency at full load and features a compact 2U design to save space. Its IP65 protection rating suits demanding environments. Multiple communication interfaces, power-quality analysis, and a mechanical isolation disconnect are integrated. Passive cooling eliminates routine maintenance, ensuring stable and reliable power supply.
Core Advantages
| Fast, Seamless Transfer |
Based on a hybrid design, the transfer time is under 15 ms, enabling millisecond-level fault response and proactive transition to off-grid operation. Integrated grid phase tracking allows smooth, seamless switching between grid-connected and off-grid modes in coordination with a PCS, ensuring uninterrupted power to the load. |
| High Reliability & Stability |
With an IP65 protection rating, the unit is suitable for highly polluted and other harsh installation environments. Active arc-suppression technology extends electrical service life and supports all load types. Passive cooling requires no additional maintenance, delivering excellent operational reliability and stability. |
| High Efficiency & Power Density |
Conduction loss is close to zero, and efficiency exceeds 99.9% at full load, significantly reducing energy consumption and system operating costs. The compact 2U enclosure saves cabinet space and improves space utilization. |
| Smart Integration |
Supports Ethernet, CAN, and RS485 communication protocols for operating and energy-consumption monitoring. Built-in power-quality analysis helps the system manage harmonics. A mechanical isolation disconnect is also integrated, eliminating the need for a separate system contactor and simplifying the overall system architecture. |