Mikovhe Electrical & Training Projects

MV Miniature, NEC/NER/AUX up to 1MVA 33KV, Power & Distribution Transformers up to 60MVA 132KV

At Mikovhe Electrical and Training Projects, we specialize in the maintenance, refurbishment, and repair of power and distribution transformers. Our team of qualified technicians and engineers is equipped with the expertise and modern tools required to ensure reliable transformer performance, safety, and efficiency.

Our end-to-end approach ensures that each transformer leaving our workshop meets the highest standards of safety, reliability, and performance, in compliance with SANS and IEC specifications.

We provide a full range of transformer services, including:

  • MV Miniature, NEC/NER/AUX Systems – Servicing and testing of medium-voltage miniature substations, neutral earthing resistors, and auxiliary units up to 1 MVA / 33 kV.

  • Power & Distribution Transformers – Repair, testing, and refurbishment of units up to 60 MVA / 132 kV.

  • Full Condition Assessment – Comprehensive inspections including insulation resistance, oil analysis, thermographic scanning, and visual checks to assess transformer health.

  • Complete Incoming Tests – Electrical and mechanical tests performed upon transformer arrival to determine condition prior to service.

  • Core Repairs and Replacement – Reconditioning or replacement of damaged magnetic cores to restore efficiency.

  • Full Rewinding Services – Precision rewinding of HV and LV windings using high-quality copper conductors and insulation materials.

  • Coil and Supply Lead Repairs – Repair or replacement of worn or damaged leads and coils.

  • Protection Evaluation and Replacement – Testing, calibration, and replacement of protection relays and components to ensure safe operation.

  • Bushing Servicing, Refurbishment, and Replacement – Maintenance of HV and LV bushings to prevent oil or dielectric failures.

  • Sandblasting and Tank Respray – Surface treatment, corrosion control, and professional respraying of transformer tanks and conservators.

  • Main Tank Repairs or Replacement – Structural repairs or complete replacement of damaged transformer tanks.

  • Auxiliary Parts Servicing and Replacement – Maintenance and replacement of radiators, conservators, valves, and breathers.

  • LV and HV Box Repairs or Replacement – Refurbishment or upgrade of low- and high-voltage terminal boxes.

  • Pressure and Leak Testing – Transformer pressure tests to identify and eliminate oil or gas leaks.

  • OLTC (On-Load Tap Changer) Servicing – Cleaning, inspection, contact replacement, and performance testing of tap changers.

  • Factory Acceptance Testing (FAT) – Comprehensive functional testing before dispatch or commissioning.

  • Final Testing and Reporting – Post-repair testing, commissioning, and detailed test reports with performance certification.

MV Miniature, NEC/NER/AUX up to 1MVA 33KV, Power & Distribution Transformers up to 60MVA 132KV

At Mikovhe Electrical and Training Projects, we specialize in the maintenance, refurbishment, and repair of power and distribution transformers. Our team of qualified technicians and engineers is equipped with the expertise and modern tools required to ensure reliable transformer performance, safety, and efficiency.

Our end-to-end approach ensures that each transformer leaving our workshop meets the highest standards of safety, reliability, and performance, in compliance with SANS and IEC specifications.

We provide a full range of transformer services, including:

  • MV Miniature, NEC/NER/AUX Systems – Servicing and testing of medium-voltage miniature substations, neutral earthing resistors, and auxiliary units up to 1 MVA / 33 kV.

  • Power & Distribution Transformers – Repair, testing, and refurbishment of units up to 60 MVA / 132 kV.

  • Full Condition Assessment – Comprehensive inspections including insulation resistance, oil analysis, thermographic scanning, and visual checks to assess transformer health.

  • Complete Incoming Tests – Electrical and mechanical tests performed upon transformer arrival to determine condition prior to service.

  • Core Repairs and Replacement – Reconditioning or replacement of damaged magnetic cores to restore efficiency.

  • Full Rewinding Services – Precision rewinding of HV and LV windings using high-quality copper conductors and insulation materials.

  • Coil and Supply Lead Repairs – Repair or replacement of worn or damaged leads and coils.

  • Protection Evaluation and Replacement – Testing, calibration, and replacement of protection relays and components to ensure safe operation.

  • Bushing Servicing, Refurbishment, and Replacement – Maintenance of HV and LV bushings to prevent oil or dielectric failures.

  • Sandblasting and Tank Respray – Surface treatment, corrosion control, and professional respraying of transformer tanks and conservators.

  • Main Tank Repairs or Replacement – Structural repairs or complete replacement of damaged transformer tanks.

  • Auxiliary Parts Servicing and Replacement – Maintenance and replacement of radiators, conservators, valves, and breathers.

  • LV and HV Box Repairs or Replacement – Refurbishment or upgrade of low- and high-voltage terminal boxes.

  • Pressure and Leak Testing – Transformer pressure tests to identify and eliminate oil or gas leaks.

  • OLTC (On-Load Tap Changer) Servicing – Cleaning, inspection, contact replacement, and performance testing of tap changers.

  • Factory Acceptance Testing (FAT) – Comprehensive functional testing before dispatch or commissioning.

  • Final Testing and Reporting – Post-repair testing, commissioning, and detailed test reports with performance certification.

MANUFACTURING

  • Design and manufacturing of distribution transformers and miniature substations up to 1 MVA, for 11 kV, 22 kV, and 33 kV systems — including LNERs, NECRTs, and other related equipment.
  • Design and manufacturing of LV panels and MV switchgears according to system-voltage specifications.
  • Design and manufacturing of oil purification, regeneration, and sludge plants for hydraulic oil, transformer oil, and turbine oil sludge applications.

MANUFACTURING

  • Design and manufacturing of distribution transformers and miniature substations up to 1 MVA, for 11 kV, 22 kV, and 33 kV systems — including LNERs, NECRTs, and other related equipment.
  • Design and manufacturing of LV panels and MV switchgears according to system-voltage specifications.
  • Design and manufacturing of oil purification, regeneration, and sludge plants for hydraulic oil, transformer oil, and turbine oil sludge applications.