• Mobile substations are generally used to supply power to open cast mining dragline excavators.
  • A robust construction capable of handling harsh conditions when lifted by a crane or dragged over open ground. This minimises both torsional and linear stresses on the equipment.
  • M.V. enclosure is equipped with outdoor open bushings to allow for overhead lines connection.
  • All controls and monitoring are carried out remotely in a segregated control room.
  • A fence is integral to the skid to protect and prevent un-authorised access.

Specifications

Oil Cooled Transformer

Range/Rating 3MVA up to 15MVA, 3 phase, 50Hz
Primary Voltage Up to 33000V.
Secondary Voltage Up to 22000V.
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 with winding temperature monitoring
Insulation Class A, 105°C
Duty Cycle Continuous
Transporter Skid base, wheels or free standing
Atmosphere Open Pit
Standards IEC/SANS 60076/1-5/8/11/12 and SANS 780

Dry Type Transformer

Range/Rating 3MVA up to 10MVA, 3 phase, 50Hz
Primary Voltage Up to 22000V.
Secondary Voltage Up to 11000V.
Tapping Arrangement OFF-LOAD Tap switch, or as per customer requirements
Vector Group Dyn11 or as per customer requirements
Cooling Method ANAN
Windings Copper wound with winding temperature monitoring
Insulation Class C, 220°C
Duty Cycle Continuous
Transporter Skid base, wheels or free standing
Atmosphere Open Pit
Standards IEC/SANS 60076/1-5/8/11/12