Hitachi Energy presented innovative transformers with surge arresters at the InnoTrans 2024 exhibition. This solution is designed to improve equipment reliability and prevent breakdowns. This was reported by the railway transport news portal Railway Supply.

Surge arresters for transformers
Photo, source: Hitachi Energy

Surge arresters protect transformer windings in the event of sharp voltage spikes. This technology can be used in both dry and oil-filled transformers. This innovation helps prevent equipment damage, reducing repair or replacement costs, and minimizing production downtime.

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The solution is based on varistors connected in parallel to the transformer windings. As voltage increases, their resistance sharply decreases, providing effective equipment protection. This reduces the risk of transformers failing due to critical voltage surges.

Transformers equipped with such arresters are successfully used in metro power systems in several countries, including India and European states. These systems ensure stable equipment operation in challenging conditions, guaranteeing safety and long-term performance.

Hitachi Energy promotes its solutions globally, offering innovations to improve the efficiency and reliability of energy systems.

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