At Saare substation, a 4 MVA power transformer was replaced, ensuring the reliability of local electricity supply for a smaller area. Upgrading the compact unit improves energy loss indicators and reduces maintenance costs.
Small-capacity 4 MVA transformers play an important role in the power supply of dispersed rural areas, where lines are long and loads are modest. At Saare substation, an outdated unit was replaced with a modern, high-efficiency transformer that meets energy efficiency standards. The new unit is equipped with a digital protection system that enables remote monitoring and fast fault detection.
Installation was carried out as a planned outage, during which the old unit was dismantled, the foundation was prepared, and the new transformer was installed with all connections and grounding systems. The short commissioning period enabled return to service with minimal outage time, which is essential from the perspective of regional supply security.
