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Single Phase Step Voltage Regulator – Product Release

Tyree Transformers continues to grow with the expansion of our product range. With the addition of Single-Phase Step Voltage Regulators to our existing range of transformers and regulators, we are poised to offer even more comprehensive solutions to support our customers’ power management needs.

Team Tyree developed this product in direct response to significant demand from our utility clients. In recent years, there has been a notable scarcity of alternatives to fully imported products. This scarcity created a need for an alternative solution, prompting our team to create a product that meets our clients’ specific requirements.

Tyree’s regulators feature the following;

  • Type tested to IEC60076-21
  • 32-step voltage regulation available in circuit A, B or other for OPEN or CLOSED DELTA applications.
  • Type tested and field proven reactor type on-load tap-changer (OLTC) to match existing network practice
  • Neutral Position / Bypass indication, and test with redundant verification test and isolation for operator safety
  • AS / IEC compliant aerial bushings
  • Hot dip galvanised tank for superior corrosion protection
  • Robust outdoor rated control enclosure wired to AS3000
  • Utility grade and proven SEL voltage regulator controller with 240VAC auxiliary to suit the Australian domestic market
  • Filled with either mineral oil or natural ester high flash point fluid

Tyree’s Single Phase Step Voltage Regulators are offered in standard ratings of up to 300A, covering voltage classes of 12kV, 24kV, and 36kV. These regulators provide essential voltage control solutions for various applications. With a commitment to efficiency and timely delivery, our factory lead times from order placement are currently under 20 weeks. This ensures that our customers can rely on prompt access to our range, facilitating smoother operations and project timelines.


Manufactured in our state-of-the-art facility located in Mittagong, New South Wales, our Single-Phase Step Voltage Regulators are meticulously designed to withstand the most challenging environmental conditions encountered in both Australia and New Zealand. Recognizing the diverse and often harsh landscapes of these regions, our regulators undergo rigorous testing and engineering processes to ensure optimal performance and durability.

For more information on this product and Tyree, please visit our website www.tyree.com.au or contact our sales team sales@tyree.com.au