Customised transformer designs, built to order

Bespoke Transformers

Special Transformers for Bespoke Requirements

Get exactly what your projects need with a bespoke design and build transformer. Our distribution transformers can be customised to meet your specific site requirements. Often referred to as "special transformers", customising the design incurs longer lead times than standard products. Choose from a range of modifications, including but not limited to:

• Breathing Type (Free Breathing or Hermetically Sealed)

• Core Materials (Amorphous or CRGO)

• Winding Materials (Copper or Aluminium)

• Voltage Ratio

• Multi Windings (three or more)

• Impedance

• K Factor (electrostatic shielding)

• Vector Group

• Type of Cooling

• Voltage Regulation

ETX at 33kV

Earthing Transformers

Also known as zig-zag transformers due to their vector grouping, earthing transformers create a neutral point for the power system by providing a path to the ground or earth for fault currents. In the event of a fault in normal operating conditions, such as a short circuit, the earthing transformer allows the fault current to flow to the ground. This protects the equipment, mitigating potential hazards such as electrical shocks or fires and limits the magnitude of transient overvoltages by providing a low impedance path to the ground.

Product Specifications:

• Short Time Current Rating and Duration

  • Maximum Current: 1500 amps

  • Duration: 10 seconds

• Vector Group: ZN or any other vector group as per IEC 60076

AUX up to 4500kVA for dual winding

Auxiliary Transformers

Auxiliary transformers typically step down or up the voltage to a safer level suitable to power plant auxiliary loads and equipment on site, such as lighting, CCTV, and fire systems. They also help isolate the control circuits from higher voltages in the main power system, ensuring the site facilities' safety and proper functioning. Our auxiliary transformers are designed bespoke to your needs and installed where necessary as part of your power transformer assembly.

Typical Product Specifications:

• Primary Voltage Levels: 6.6kV, 11kV, 11-6.6kV or 33kV

• Secondary Voltage Levels: 415V or 433kV

• kVA rating can go higher than 4500kVA in the case of three-winding or more

• Vector Groups: Dyn11 or Dyn1, or any other vector groups as per IEC 60076