Oil Cooled Transformers

Distribution / Power

✓  Transformers are designed, manufactured and routine tested in accordance with IEC / SANS standards.

✓  The oil cooled distribution transformers rating vary from 315kVA up to 10MVA, with the primary voltage up to 22kV and secondary voltage up to 11kV.

✓  Available in standard or customised tapping arrangement, with ON-LOAD or OFF-LOAD tap changer.

✓  Transformer enclosure can be either hermetically sealed or free breathing, depending on the size as specified by SANS / IEC standard.

✓  The units are either skid base mounted, wheels or free standing, with cable boxes or outdoor open bushings, fitted with all necessary fittings (WTI, OTI, Pressure Relief Valve, etc.)


Range/Rating 315kVA up to 10MVA, 3 phase, 50Hz.
Primary Voltage Up to 22000V.
Secondary Voltage Up to 11000V.
Tapping Arrangement ON or OFF-LOAD Tap switch, as per customer requirements
Vector Group Dyn11 or as per customer requirements
Cooling Method ONAN
Windings Copper wound
Insulation Up to Class A, 105 degrees
Duty Cycle Continuous
Transporter Skid base, wheels or free standing
Atmosphere Underground (non-fiery) or surface
Standards IEC/SANS

Excellence skills & Quality work

Hansen + Genwest  provides a 24/7 service
for breakdowns, installations, commissioning
and maintenance. 

Our Products and Services

Hansen + Genwest will continue with dry type transformers that have stood the test of time, as well as the customised products and services that makes us a leader in our field. We will also focus our efforts on introducing new and unique products as the market dictates.

Flameproof Transformer 1
Flameproof Power Pack
Dry Type Transformers
Mobile Substation
Flame Proof Gate End Boxes
Air Reliant Compressors
HAUHINCO Pumps (Agency)