Transformer Services

Quality Services at Minimum Time and Cost

We provide both onsite and offsite 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
Internal inspection of core and windings with repair
Drying CCA at Site
On Site Winding Replacement
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

Off Site Services

Rewinding to meet original specification with thermally upgraded insulation.
Installation of advanced technology on-load & off load tap changers.
Replacing old and absolute bushings with new hybrid bushings.
Replacement of old rusted and leaked tanks, radiators.
Drying out and overhauling of transformers.
Replacement of damaged core.
Installation of technologically upgraded measuring and monitoring devices on transformer.
Rewiring protection accessories with new added features.
We repair transformers, voltage regulators, oil circuit reclosers, and pad mounted switches.
Gaskets and oil seal replacement, repair of oil leaks.
Our engineers work closely with local electrical contractors or in-house maintenance staff to design a program that meets your needs. We can rebuild your original transformer on site and in place if the situation demands.

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.
Separate Source AC withstand voltage test.
Induced AC voltage test
Partial discharges Measurement
Lightning Impulse Test
Switching Impulse Test
Tests of on-load tap-charges

Temperature Rise Test (Short-circuit method)
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 & Resistance
Current Transformer Ratio, Polarity and Saturation
Phase Relation