Kolector Etra d.o.o. was contracted by Westermost Rough Limited to supply and install 34/0.4 kV auxiliary and earthing transformers on the offshore substation platform serving the Westermost Rough transmission assets. These auxiliary transformers provide low‑voltage supplies and earthing functions needed for the operation of the offshore HVAC substation, supporting control, protection, lighting and ancillary systems within the OFTO’s offshore asset.