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To extend the life of your assets, Hitachi Energy provides advanced services to be performed on-site, aiming to maintain the performance of the transformer for which specific equipment and a higher degree of expertise are required. It is usually linked with diagnostic tests and possible engineering studies to clearly determine the most appropriate route of action and ensure a condition-based maintenance plan.


Typical Advanced Maintenance Services Other Advanced Maintenance Services
  • Maintenance undertaken during an outage typically every 3-5 years
  • Includes electrical measurements and testing
  • Tap-changer services package can be customized to include inspection, oil sampling, or maintenance interval services to ensure the reliable operation of your tap-changer
  • Oil services, including drying, de-gassing, and reclaiming
Advanced Maintenanace for Transformers Service

Oil Services

Tap-changer Services

  • Annual visual inspections of motor-drive mechanism, heater, oil
  • Oil sampling and diagnostics with recommendations
  • Interval maintenance checks based on OEM guidelines
  • Contact replacements as needed
  • Latest upgrade kits

TXLife Advance Maintenance Package

  • Oil analysis
  • Functional electrical testing
  • Review of operating parameters
  • Testing of protection and control devices
  • Tap-changer maintenance
  • Condition assessment based on on-site data collected by our team

Routine Maintenance

Hitachi Energy provides preventive actions to be performed on-site that aim to maintain the performance of your transformers.

Transformers Parts

Hitachi Energy provides high-quality spare parts and consumables, sub-assemblies, or complete finished products for the maintenance of an existing installation.

Oil Regeneration or Reclamation

Hitachi Energy offers an oil reclamation or regeneration process whereby oil is processed to achieve a significant condition improvement, aimed at being as close to “as new” as possible by removing aging products.

On-site low frequency heating (LFH) drying

Hitachi Energy offers a plant and process concept that underlines the importance of assessing the insulation system's moisture and temperature. Temperature and vacuum are the main factors for drying speed and drying quality.


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Transformer service

Aging assets, rising energy demand, and the critical need to avoid unplanned outages are challenging worldwide utilities and industrials. The service portfolio of Hitachi Energy allows utilities and industrials to maximize the return on transformer assets by ensuring high reliability, reducing life cycle costs, and ensuring optimized performance while lowering environmental impact.
Hitachi Energy Power Transformers


Hitachi Energy offers distribution and power transformers, Dry-type and EconiQ™ Transformers as well as services, for industrial and commercial applications.