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TXLife Condition Assessment

In a fast-changing environment, asset managers need to keep up with past challenges to produce, transmit, distribute, and deliver electrical power in a reliable way. Aging assets, rising energy demand, and the need to deliver without unplanned outages are some of the challenges utilities and industries are facing today around the world.

Fixing these challenges means that new solutions are needed to maintain the installed base of assets as well as when refurbishing, repairing, or upgrading legacy transformers. Since the late 90s, Hitachi Energy has offered a modular three-step approach to a Condition-Based Maintenance or Reliability Centered Maintenance program:

Step 1. Fleet screening survey: A quick scan of a large population (20 to 200 units) collects easily accessible data, such as unit nameplate data, oil and dissolved-gas-in-oil data, load profile, history of the unit, and sister units.

Step 2. Condition assessment: At this stage, transformer design experts focus on a smaller number of units (10 to 20) identified in step 1. They use modern design rules and tools to evaluate the original design. Advanced diagnostic tests are performed to assess each of the principal properties of the transformer in a structured way. This assessment leads to an estimate of each transformer`s risk of failure and defines action plans to improve the reliability of each unit.

Step 3. Expertise: The number of units to be further analyzed is typically limited to two or three out of a population of 100 units. This third module of the assessment process provides accurate information with respect to overloading transformers, enhancing their performance (power or voltage increase), or extending their lifetime.

Our service offerings assess the operational condition of transformers, provide recommendations to mitigate risks, and enhance the performance of aged equipment to meet possible new requirements. It also provides state-of-the-art information on online monitoring solutions, maintenance, and repair options to be used to ensure reliable operating conditions.


Why Hitachi Energy

  • With our Condition-Based Maintenance Program, control maintenance costs can be optimized while achieving highly reliable power delivery.
  • Using the Mature Transformer Management Program (MTMP™), units at Risk of Failure and units requiring further attention and actions are singled out.
  • With screening, capital expenditure can be steered to units most in need, and the investment plan can be evaluated for different service options in a pre-set time frame (e.g., 2012 to 2042).
Engineering and Consulting Services

Scope of work

Mature Transformer Management Program (MTMP)

It is three steps approach that can be applied to a single or fleet of transformers. The steps include fleet screening, design and condition assessment, and life assessment /profiling of the transformer fleet. The reports provide each transformer's condition and life assessment with recommendations for further action in order to minimize or eliminate the risk of failures.

For more information on MTMP, please download the leaflet below:

Basic Diagnostics Testing

Visual Inspection, Standard Oil Test (SOT), Dissolved Gas Analysis (DGA), Furan Analysis, Polychlorinated Biphenyl (PCB), Copper Sulphide (Cu2S), Standard and Special Tests


Advance Diagnostics Testing

Advanced Dissolved Gas Analysis (ADGA), Frequency Response Analysis (FRA), On-Load Tap Changer Vibration Diagnostic, Dielectric Frequency Response (DFR), Partial Discharge Analysis (PDA)

For more information on Advance Diagnostics Testing, please download the leaflet below:


High-voltage testing, including applied and induced testing with Partial Discharge measurement on-site.

For more information on TrafoSiteTesting, please see the links below:

TXLife - Bushing Diagnostics Package

Our bushing diagnostics package includes required inspection and testing to determine the condition of your bushings accurately, providing early warning of failure and enabling proactive replacement planning. Following recommended factory test protocols and fully supported by factory experts, our locally trained service teams can fully support you in understanding the condition of your bushings and the best way to manage reliable operation.

For more information on TXLife Bushing Diagnostic Package, please download the leaflet below.

Inspection and diagnostics

Hitachi Energy extends the life time of your transformers.

APM Edge

APM Edge is an on-premise, standalone asset performance management (APM) software, a subset of the larger Hitachi Energy digital enterprise APM software.
TXplore™ internal transformer

TXplore™ transformer inspection robot

Hitachi Energy's TXplore™ accomplishes an internal inspection examining the structure of the transformer without the need to remove the oil and send an inspector into the confined space of a power transformer. The TXplore™ system avoids the danger of a spill when handling the oil and the risk of sending someone inside the transformer to perform an inspection.


Our Global Service Teams are here to support you anytime!

Get to know more

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.