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Predictive maintenance of transformers. Tests

ARE YOU INTERESTED?

This service is intended for any organisation managing electrical transformers that need to be validated during their reception, prior to their implementation or once in service, electrical companies involved in generation, transport and distribution, as well as engineering companies providing regular or regulatory inspections.

A complete diagnosis

CEIS implements a series of testing techniques that allow for optimisation of the service life of electrical transformers and the analysis of the origin or cause of faults and defects in the latter. The transformer measurement service includes:

  • Capacity and tan delta test in general insulation
  • Capacity and tan delta test in terminals
  • Excited nucleus test
  • Transformation ratio test
  • Ohmic resistance test of windings
  • Dynamic resistance measurement test for OLTC assessment
  • Insulation resistance test
  • Frequency dielectric spectroscopy test
  • Magnetic balance
  • Frequency response of stray losses (FRSL) measurement
  • Demagnetization

BENEFITS OF THE SERVICE

The power transformer electrical measurement service provides a series of tangible advantages in the operation of these assets, such as:

  • Reduction of the unavailability times of the transformer
  • Reduction of maintenance costs in the medium term, avoids corrective interventions.
  • Optimización de la vida útil de los activos, maximizando el retorno de la inversión.
  • Optimisation of the service life of the assets, maximising the return on investment
  • Increasing knowledge on the status of your equipment.

Electrical transformers:

The network core

The importance of predictive maintenance of power transformers

The electricity network is a strategic and critical infrastructure for the economy of a nation, and as a result, the assets that make it up, such as generation units, LV/MV transport and distribution units, interconnection substations, power transformers and transformation centres close by are of fundamental importance.

One of the main assets of an electrical infrastructure is the electrical transformer, which enables the transfer of electrical energy in the appropriate technical conditions and the reduction of network losses from generation to consumption points.

A transformer fault has serious consequences at economic and social level, causing massive power cuts, ceasing production of a production centre and, in the most extreme case, even leading to economic bankruptcy. Maintenance activities are of great importance in order to preserve, maintain or restore the service life of assets making up the network.

Predictive maintenance or smart maintenance of a transformer is oriented to actions only bearing in mind the condition of the asset defined based on a series of modifications, tests, analyses, data collection, manufacturer’s expertise and exploitation curve.

Our predictive maintenance services for transformers

ELECTRICITY MEASUREMENTS: Electrical tests enabling to assess the status of the different parts making up an electric machine and to check the evolution of the latter in order to determine potential maintenance actions to be implemented.
ANALYSIS OF DIELECTRIC OILS: Oil is one of the main components of a transformer which plays a dual role – as electrical insulator of the active parts and cooler – since it contributes to the release of the thermal energy of the equipment. The chemical and physical analysis of certain parameters in this oil enables to determine the status and assessment of the equipment.

ARE YOU INTERESTED?

This service is intended for any organisation managing electrical transformers that need to be validated during their reception, prior to their implementation or once in service, electrical companies involved in generation, transport and distribution, as well as engineering companies providing regular or regulatory inspections.

A complete diagnosis

CEIS implements a series of testing techniques that allow for optimisation of the service life of electrical transformers and the analysis of the origin or cause of faults and defects in the latter. The transformer measurement service includes:

  • Capacity and tan delta test in general insulation
  • Capacity and tan delta test in terminals
  • Excited nucleus test
  • Transformation ratio test
  • Ohmic resistance test of windings
  • Dynamic resistance measurement test for OLTC assessment
  • Insulation resistance test
  • Frequency dielectric spectroscopy test
  • Magnetic balance
  • Frequency response of stray losses (FRSL) measurement
  • Demagnetization

BENEFITS OF THE SERVICE

The power transformer electrical measurement service provides a series of tangible advantages in the operation of these assets, such as:

  • Reduction of the unavailability times of the transformer
  • Reduction of maintenance costs in the medium term, avoids corrective interventions.
  • Optimización de la vida útil de los activos, maximizando el retorno de la inversión.
  • Optimisation of the service life of the assets, maximising the return on investment
  • Increasing knowledge on the status of your equipment.

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