SERVICES

The interruption of the electrical service due to a medium or high-power transformer not only causes inconvenience but can also result in significant financial losses. This is why it is essential to have an efficient maintenance plan that ensures optimal operation.

To avoid failures and extend the life of a transformer, it is crucial to conduct regular inspections and monitor both the operating temperature and the condition of the oil and the internal components. These steps not only allow us to make informed decisions but also protect our investment and guarantee service continuity.

Below, you can discover the specialized services that ITESA offers to keep your transformers in perfect condition and prevent any interruptions.

Corrective Maintenance for TRANSFORMERS

Modification of Connection Group
Voltage Change in M.V. & L.V.
Structural Design Modification (Tank & Cover)
Replacement of Mineral and/or Vegetable Dielectric Oil
Replacement of Bushings on M.V. & L.V. sides

Substation Assembly and Accessory Connections

Installation and assembly of Cell Substations
Transformer installation
Installation and calibration of disconnectors
Installation of fuses
Verify the work area
Assembly of Incoming Cell
Assembly of Transformer Cell
Assembly of Low Voltage Cell
Installation of Disconnector and/or Protection Cell
Mounting of Distribution Transformer
Installation of Magnetic Circuit Breaker in L.V. Cell
Electrical Testing on Disconnector
Transformer Magnetic Circuit Breaker L.V.

Installation and Assembly of Transformers

Installation of Distribution Transformer – Mixed types
On-site Overhead Transformer and Cut-Off Maintenance Services
On-site Transformer Inspection and Evaluation Services
Field testing
Qualified personnel for each type of work
Power Factor Test
Winding Capacitance Test
Excitation Current Test
Transformation Ratio Test
Winding Resistance Test
Insulation Resistance Test
Dew Point Test

Oil Extraction & Analysis

Withdrawal of Oil Samples from Transformers on-site or in plant
Physical-Chemical Analysis
- Water content / humidity
- Interfacial tension
- Color
- Visual appearance
- Dielectric strength
- Power loss factor (100%)
Chromatographic Analysis
Corrosive Sulfides Analysis
PCB (Discard) Analysis
Particle Count
Oxidation Inhibitor
PCB (Quantitative) Analysis

Electrical Testing (In factory and/or field)

Prueba de Relación de Trasformación
Transformation Ratio Test
Winding Resistance Test
Insulation Resistance Test
Applied Voltage Test
Short Circuit Test
No-Load Test
Induced Voltage Test
Impulse Test

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