Transformer Services

Quality Services at Minimum Time and Cost

We provide onsite Transformer services. Each member of our field and repair team for maintenance and services of transformer is highly-trained and outfitted with state-of-the-art testing equipment and repair tools. We use top quality materials to ensure quality services at minimum time and cost, thus delivering excellent services to our customer.

On Site Services

Assembly Testing & Commissioning of new and old transformers.
Attending Shutdowns and preventive maintenance activities.
On site OLTC inspection and preventive maintenance.
Oil Filtration / Regeneration / Passivation activities
Shifting of transformers & other substation equipment.
Attending all types of leakages.
Refurbishment / Repair / Replacement Cooler Installations.

Oil Maintenance

Transformer Oil Replacement, Treatment & Filtration Services

Reliable on-site oil sample collection and management.

Oil sample testing and analysis by a SABS accredited laboratory.

Sample testing for:

Dielectric strength / breakdown
Moisture content
Acidity
Dissolved gas analysis (DGA)
PCB testing with supply of labeling
Furanic testing (degradation of insulation)
Interfacial surface tension (IFT)
DBPC analysis
Density
Viscosity
Corrosive sulfur test
Oxidation
Sediment and sludge
Flash point
Pour point
Particle count
Degree of polymerization
Dielectric Dissipation factor and resistivity (DDF), Resistivity and Permittivity

Reporting & Care

Managed results that are stored for future referencing and analysis.
Detailed assessment reports on the transformer condition (oil leaks, paint condition and recommended repairs).
Feedback (records and reports) to customers in hard copy and electronically.
On-site cleaning and painting of transformers.

Comprehensive Testing

Transformer Testing Services Like:

Break Down Voltage Test (BDV)
No load test / Open Circuit test
Vector Group verification test
Measurement of impedance voltage/short circuit impedance (principal tap) and load loss (Short circuit test)
Measurement of zero-sequence impedance of three-phase transformers Short-circuit test.
Measurement of acoustic noise level / Measurement of Sound level.
Measurement of voltage ratio and check of phase displacement.
Low Voltage Impedance Testing (Leakage Reactance)
Measurement of no load losses and Magnetizing Current.
Partial discharges Measurement
Lightning Impulse Test
Switching Impulse Test
Tests of on-load tap-charges

Lightning Impulse chopped on the tail test
Capacitance and power factor measurement
Measurement of harmonics in no-load current
Measurement of vibrations
Metals-in Oil
Sweep Frequency Response Analysis (SFRA test)
Dielectric Frequency Response Analysis (DFRA)
Power Factor Test of Windings
Power Factor Test of Bushings
Surge Arrester Test
IR/PI Winding Insulation Resistance Test
Core Insulation Measurement
Transformer Turns Ratio
Winding Excitation
Winding Resistance
Current Transformer Ratio, Polarity and Saturation
Operational Check of Controls
Calibration of Gauges
Phase Relation