Reliable transformers
17 Lincoln Road,
Benoni South,
Gauteng Province,
South Africa
Contact Details
Tel: +27 11 421 2333
Fax: +27 11 421 3446

SWER Tranformers (Single Wire Earth Return)

SWER Transformers are principally used for rural electrification.

Single Wire Earth Return (SWER) or single wire ground return is a single-wire transmission line for supplying single-phase electrical power from an electrical grid to remote areas at low cost. Its distinguishing feature is that the earth (or sometimes a body of water) is used as the return path for the current, to avoid the need for a second wire (or neutral wire) to act as a return path.

Cooling & Enclosures
  • Oil Filled, Sealed
  • Oil Filled, Free Breathing
  • Winding Material
  • Copper
  • Aluminium
  • Mounting & Base
  • Flat
  • Skids
  • Pole or Platform Mount
  • Standard Fittings
  • Oil Level Gauge
  • Filler & Drain Valves
  • Lifting Lugs
  • Optional Fittings
  • LV Cable Box
  • Silica Gel Breather
  • Oil Thermometers
  • Pole-Mount Bracket
  • Tap-Switch
    KVA 16KVA 300KVA
    Primary Voltage 12.7KV, 19.1KV
    Custom Voltages available on request.
    Secondary Voltages 240V 0 240V
    Custom Voltages available on request.
    Electrical Winding Resistance, Winding ratio & Vector Verification, Load Loss, No-load Loss, Power Frequency, Insulation Breakdown.
    Mechanical Effectiveness of sealing, Paint thickness, Vibration & Noise.


    Our name says it all. We have been producing top quality products for more than 30 years and will continue to innovate and improve our products to ensure that you, the customer, get the best value for your money.

    We design, manufacture and test our products strictly according to the SANS 780 and other applicable transformer specifications.


    Our warranty covers any defective workmanship and/or materials for a period of 12 Calendar months from the date of purchase. Carry in Warranty.

    Proudly made in South Africa

    Our products are proudly designed and manufactured in South Africa.

    We understand the challenges our customers face in Africa. Our engineers go the extra mile to ensure that our transformers are practical and easy to handle and install. Many of our design innovations focus specifically on lifting, moving and cable installation.

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