Refurbishment

Upon receipt of the transformer in the factory, a visual inspection and electrical control will be performed to identify which rehabilitation actions will be taken, as well as to provide a delivery date. Pending the root cause and agreed actions taken, the active part will be untanked and inspected.

Following upgrade/service of noble parts, accessories and other auxiliary equipment, the active part is dried and replaced in the tank, which is refilled with oil and high-voltage test performed. After the factory acceptance test the newly revitalized transformer is ready to be delivered back to its owner.

If requested, Hitachi Energy can of course cater for the transport of the unit back and forth from the site.

The rehabilitation would not replace the windings or the core, but rather rejuvenate the transformer performing refurbishment on eg, coolers, radiators, breathers, pumps and valves, provide services such as re-gasketing, inspection and re-clamping of connections, oil filtration, revision of tap changer, or clean, re-tighten and dry the active part. All is concluded by performing the appropriate tests.