Services

Expert care for the full life cycle of your electrical assets

From diagnosis to major rehabilitation, from preventive maintenance to 24/7 emergency. Every service backed by precision instrumentation and a documented protocol.

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Power transformer maintenance

Preventive, corrective and major maintenance for distribution and power transformers from 75 kVA to 230 MVA, under IEEE C57 and IEC 60076.

Transformer rehabilitation & repair (incl. shell-type)

Major rehabilitation and repair of distribution and power transformers — including shell-type (armored) transformers — up to 230 MVA.

Shell-type (acorazado) transformer repair

Repair and rehabilitation of shell-type power transformers and their tap changers, up to 230 MVA — a capability few shops in Mexico and Latin America offer.

Power transformer rewinding

Total or partial rewinding of high- and low-voltage windings, with conductor and insulation to the design specification, up to 230 MVA.

Diagnostics & electrical testing

Diagnostic electrical testing of transformers and substations with Omicron and Megger instrumentation and a documented protocol.

Substation maintenance

Maintenance and integration of MV and HV substations up to 230 kV: breakers, protection, instrument transformers and documented commissioning.

Tap changer (OLTC) repair

Repair and maintenance of on-load (OLTC) and de-energized (DETC) tap changers: contacts, mechanism, oil and acceptance testing.

Transformer bushing repair & replacement

Diagnosis, repair and replacement of transformer bushings — one of the most violent causes of catastrophic failure.

Transformer magnetic core repair

Repair of the magnetic core: shorted laminations, core ground faults and restacking, diagnosed with excitation current and core-loss testing.

Transformer drying

Removal of moisture from the paper insulation to restore dielectric strength and extend insulation life, verified by testing.

Transformer & substation commissioning

Pre-energization testing and acceptance protocol to confirm a transformer or substation is fit to enter service.

Modernization & repowering

Upgrade and repower transformers and substations to extend their useful life and capacity, integrating modern protection and control.

Thermographic inspection

Infrared predictive inspection of transformers and substations, performed under load, to find hot spots before they cause failure.

Switchboard maintenance

Maintenance of distribution, control and protection boards and MCC cabinets, with cleaning, re-torque, thermography and testing.

Dielectric oil filtering

Vacuum dehydration and filtering of transformer dielectric oil to restore dielectric strength and remove moisture, gases and particles.

24/7 emergency service

Immediate remote diagnosis and on-site crew for critical assets with unplanned outages, across Mexico.

Transformer sales

Supply of distribution and power transformers backed by Grupo TEMISA, with technical support and commissioning.

Substation sales

Supply and integration of medium- and high-voltage substations, with engineering, testing and commissioning.

Switchboard sales

Supply of distribution, control and protection boards and MCC cabinets, with technical support.

Talk to a transformer specialist

Tell us about your asset and we'll respond with a diagnosis and a tailored quote — not generic pricing.

Contact / Quote Call +52 33 3614 2460