Custom Power Transformers

These transformers are critical assets across high-voltage transmission networks and large-scale power systems. PTI power transformers are engineered for use in:

• Utilities & Transmission Operators – Step-up and step-down transformers supporting grid stability and long-distance power transmission.
• Mining & Heavy Industry – Ruggedised designs for remote operations, high load variability, and harsh environmental conditions.
• Renewable Energy Projects – Grid connection and integration for wind, solar, and hybrid power projects.
• Infrastructure & Industrial Facilities – Reliable voltage transformation for ports, rail, data centres, and large manufacturing sites.

Each transformer is designed to meet site-specific electrical, environmental, and regulatory requirements.

Custom Distribution Transformers

• Ratings available from 16 to 100 kVA up to 5 MVA 3-phase
• Designed to IEC and AS/NZ Standards (ANSI, UL, and NEMA available on request)
• Mineral or Ester oil filled (K class fluid)
• Free breathing or sealed transformers
• For general purpose, lighting and power loads in residential, commercial, industrial and mining applications
• K rated transformers meeting the demands of nonlinear loads such as VSD and inverter applications, with electrostatic screen
• De energised tap changer (automatic tap changer for on load switching available on request (TM Ecotap VPD)

Freely Breathing Transformer

Freely breathing transformers allow air exchange with the environment and are commonly used in applications where conditions are less restrictive or where cost efficiency is a priority.

In mining and industrial environments, they are suitable for:

• General-purpose applications with controlled exposure
• Sites where regular maintenance access is available
• Lower-risk environments with moderate operating conditions

Customisation ensures they can still perform reliably in selected mining scenarios.

Rate Power -50kVA - 10000kVA

Rate Voltage -400V - 33000V

Nitrogen Gas Sealed Type

Nitrogen gas sealed transformers are designed to prevent moisture ingress and contamination, making them ideal for harsh and variable environments.

They are particularly effective in:

• High-humidity regions across Africa
• Dust-heavy mining environments in Australia
• Remote sites where maintenance access is limited

By sealing the transformer with nitrogen gas, internal components are protected, extending service life and improving reliability.

Rate Power

• 30kVA - 5000kVA
• 400V - 33000V
• Rate Voltage

Dry Type Transformers for Mining

Dry type transformers are increasingly popular in mining due to their safety and environmental benefits. They do not use oil, making them ideal for sensitive or confined environments.

Custom dry type transformers for mining are commonly used in:

• Underground mining operations
• Enclosed processing facilities
• Areas requiring reduced fire risk and minimal environmental impact

Across both Australia and Africa, dry type transformers are preferred where safety, low maintenance, and sustainability are key priorities.

• Rate Power 50kVA - 10000kVA
• Rate Voltage - 400V - 33000V

Choosing the Right Custom Transformer Solution

At PTI, we work hand-in-hand with key project stakeholders to ensure transformer solutions are not only compliant but technically robust, fully documented and defensible under engineering review.

Selecting the right transformer depends on several factors, including:

• Site conditions and environmental challenges
• Load requirements and operational scale
• Installation location (surface, underground, remote)
• Maintenance capabilities and access

Working with an experienced supplier ensures that each transformer is designed to meet the specific demands of the mining environment.

Contact our team today to learn more about how our custom transformer solutions can support your project.