ArmCoil’s power transformer repair services are performed at our Roodepoort facility in Johannesburg, South Africa.

Our power transformer repair services facility is accredited and managed in accordance with our ISO9001:2015 and ISO14001:2004 quality and environment systems.

ArmCoil complies to all SANS780, IEC, TRANSNET & ESKOM repair specifications for power transformers. We offer our repair services on the following all types of power transformers such as ONAN & ONAF.

ArmCoil’s work area is 6700m2 under roof, which is equipped with a maximum 50tonne overhead remote crane among others and lifting equipment. The facility and its content are insured together with 24hour security.

The power transformer repair services capabilities are: (but not limited to)

  • Full electrical and mechanical condition assessment and repair recommendations.
  • Full rewinding on all types of distribution transformers up to 88kV (88000V).
  • Localised coil and supply lead repair services available where possible.
  • Time and Temperature Controlled Curing Oven facilities.

Complete Test Bay Facility including all calibrated testing equipment which includes:

  • No Load Testing or routine testing.
  • Load Testing.
  • Complete distribution transformer Temperature Stabilising Testing.
  • Efficiency comparison testing.
  • Oil sampling, testing and reporting in accordance to SANS555.
  • Ratio testing.
  • SFRA testing.
  • Power transformer core repairs and replacement services.
  • Cooling upgrades and redesign.
  • Protection evaluation and upgrade services.
  • Bushing servicing, refurbishment and replacement.
  • Sandblasting and respray facility.
  • Mechanical repairs and upgrade of power transformer.
  • Radiator replacement and repairs.
  • Conservator replacement and repairs.
  • Main tank replacement and repairs.
  • LV & HV Box replacement and repairs.
  • All type of auxiliary parts replacement and servicing.
  • Transformer pressure testing for leaks.
  • OLTC replacement modifications.
  • OLTC servicing, refurbishment and replacement services.
  • Mechanical design and manufacturing of power transformer for upgrade purposes.
  • Factory acceptance testing services (FAT) on power transformers.
  • OEM assembly and testing of power transformers.